染谷薄膜素子研究室 CEMS

  • FUKUDA, Kenjiro

    Degree Ph. D.
    Position Senior Research Scientist
    E-mail kenjiro.fukuda "at" riken.jp

    Biography

    Kenjiro Fukuda received his Ph.D. from the Department of Applied Physics at the University of Tokyo in 2011. From 2011 to 2015, he worked at Yamagata University as an assistant professor, and then joined RIKEN, where he is currently a Senior research scientist in the thin-film device laboratory and emergent soft system research team, Center for Emergent Matter Science. From 2014 to 2018, he has also been a PRESTO researcher of the Japan Science and Technology Agency. His current research interests include organic transistors, flexible electronics, and printed electronics.

    Publications

    • ResearcherID: K-9505-2018

    • ORCID: 0000-0001-8015-5819

    • Jump to Google Scholar Citations

    • *corresponding author

    • [*] Shumpei Katayama et al., Submitted.

    • [*] Lulu Sun et al., Submitted.

    • [*] Theodorus Jonathan Wijaya et al., Submitted.

    • [*] Seiichi Takamatsu et al., Submitted.

    • [*] Masahito Takakuwa et al., Submitted.

    • [*] Lulu Sun et al., Submitted.

    • [111] Kenjiro Fukuda*, Lulu Sun, Baocai Du, Masahito Takakuwa, Jiachen Wang, Takao Someya, Lluis F. Marsal, Yinhua Zhou, Yiwang Chen, Hongzheng Chen, S. Ravi P. Silva, Derya Baran, Luigi A. Castriotta, Thomas M. Brown, Changduk Yang, Weiwei Li, Anita W. Y. Ho-Baillie, Thomas Österberg, Nitin P. Padture, Karen Forberich, Christoph J. Brabec, Osbel Almora*, "A bending test protocol for characterizing the mechanical performance of flexible photovoltaics", Nature Energy, doi:10.1038/s41560-024-01651-2 (2024).

    • [110] Tatsuma Miyake, Masahito Takakuwa, Daishi Inoue, Daisuke Hashizume, Tomoyuki Yokota, Shinjiro Umezu, Kenjiro Fukuda*, Takao Someya*, "Direct Conductive Bonding of Silver Electrodes on Ultrathin Polymer Films" ACS Applied Electronic Materials, doi:10.1021/acsaelm.4c01197 (2024).

    • [109] Sunghoon Lee*, Joo Sung Kim, Yan Wang, Yusaku Tagawa, Wenqing Wang, Lulu Sun, Xiaoping Liang, Md Osman Goni Nayeem, Tomoyuki Yokota, Kenjiro Fukuda, Takao Someya*, "An ultrasoft nanomesh strain sensor with extreme mechanical durability against friction for on-skin applications" Device, 3, 100559 (2024).

    • [108] Baocai Du, Sixing Xiong, Lulu Sun, Yusaku Tagawa, Daishi Inoue, Daisuke Hashizume, Wenqing Wang, Ruiqi Guo, Tomoyuki Yokota, Shuxu Wang, Yasuhiro Ishida, Sunghoon Lee, Kenjiro Fukuda*, and Takao Someya*, "A water-resistant, ultrathin, conformable organic photodetector for vital sign monitoring", Science Advances, 10, eadp2679 (2024).

    • [107] Yu Ding, Sixing Xiong, Lulu Sun, Yiying Wang, Yinhua Zhou, Yaowen Li, Jun Peng, Kenjiro Fukudao*, Takao Someya*, Ruiyuan Liu*, and Xiaohong Zhang, "Metal nanowire-based transparent electrode for flexible and stretchable optoelectronic devices", Chemical Society Reveiws, 53, 7784-7827 (2024).

    • [106] Jiachen Wang, Yuto Ochiai, Niannian Wu, Kiyohiro Adachi, Daishi Inoue, Daisuke Hashizume, Desheng Kong, Naoji Matsuhisa, Tomoyuki Yokota, Qiang Wu, Wei Ma, Lulu Sun, Sixing Xiong, Baocai Du, Wenqing Wang, Chih-Jen Shih, Keisuke Tajima, Takuzo Aida, Kenjiro Fukuda* & Takao Someya*, "Intrinsically stretchable organic photovoltaics by redistributing strain to PEDOT:PSS with enhanced stretchability and interfacial adhesion", Nature Communications, 15, 4902 (2024).
    • [105] Wenqing Wang, Suksmandhira Harimurti, Daishi Inoue, Md Osman Goni Nayeem, Jiachen Wang, Chika Okuda, Daisuke Hashizume, Sunghoon Lee, Kenjiro Fukuda, Tomoyuki Yokota, Takao Someya*, "Janus Membrane-based Wearable pH Sensor with Sweat Absorption, Gas-Permeability, and Self-Adhesiveness”, ACS Appl. Mater. Interfaces, 16, 27065–27074 (2024).

    • [104] Zehao Wang, Simin Cheng, Kenjiro Fukuda, Wenping Hu*, Xiaomin Xu*, Takao Someya*, "Flexible Near-Infrared Organic Photodetectors for Emergent Wearable Applications", Wearable Electronics, 1, 53-77 (2024).

    • [103] Sunghoon Lee, Xiaoping Liang, Joo Sung Kim, Tomoyuki Yokota, Kenjiro Fukuda, Takao Someya, “Permeable Bioelectronics toward Biointegrated Systems”, Chem. Rev. 124, 6543–6591 (2024).

    • [102] Ahmed Miguel RománAbolhosen, Shinyoung Lee, Kenjiro Fukuda, Takao Someya, Leobardo HernándezGonzález, and Jun Shintake, "Functional soft robotic composites based on organic photovoltaic and dielectric elastomer actuator", Scientific Reports, 14, 9953 (2024).

    • [101] Lulu Sun, Jiachen Wang, Hiroyuki Matsui, Shinyoung Lee, Wenqing Wang, Shuyang Guo, Hongting Chen, Kun Fang, Yoshihiro Ito, Daishi Inoue, Daisuke Hashizume, Kazuma Mori, Masahito Takakuwa, Sunghoon Lee, Yinhua Zhou, Tomoyuki Yokota, Kenjiro Fukuda*, Takao Someya*, "All-solution-processed ultraflexible wearable sensor enabled with universal trilayer structure for organic optoelectronic devices", Science Advances, 10, eadk9460 (2024).

    • [100] Sixing Xiong, Kenjiro Fukuda*, Kyohei Nakano, Shinyoung Lee, Yutaro Sumi, Masahito Takakuwa, Daishi Inoue, Daisuke Hashizume, Baocai Du, Tomoyuki Yokota, Yinhua Zhou, Keisuke Tajima & Takao Someya*, "Waterproof and ultraflexible organic photovoltaics with improved interface adhesion", Nature Communications, 15, 681 (2024).

    • [99] Osbel Almora, Carlos I. Cabrera, Sule Erten-Ela, Karen Forberich, Kenjiro Fukuda, Fei Guo, Jens Hauch, Anita W. Y. Ho-Baillie, T. Jesper Jacobsson, Rene A. J. Janssen, Thomas Kirchartz, Maria A. Loi, Xavier Mathew, David B. Mitzi, Mohammad K. Nazeeruddin, Ulrich W. Paetzold, Barry P. Rand, Uwe Rau, Takao Someya, Eva Unger, Lídice Vaillant-Roca, Christoph J. Brabec, "Device Performance of Emerging Photovoltaic Materials (Version 4)", Advanced Energy Materals, 26, 2303173 (2024).
    • [98] Yu Kato, Kenjiro Fukuda, Takao Someya, Tomoyuki Yokota, "Ultra-flexible temperature-insensitive strain sensor", Journal of Materials Chemistry C, 11, 14070-14078 (2023).
    • [97] Sungjun Park, Masahito Takakuwa, Kenjiro Fukuda, Sunghoon Lee, Tomoyuki Yokota, Takao Someya*, "Toward ultraflexible organic electronic devices", MRS Bulletin, 48, 1 (2023).
    • [96] Ruiqi Guo, Wenqing Wang, Masahito Takakuwa, Kenjiro Fukuda*, Takao Someya*, "In Silico Design of Freeform Solar Cell Structures from High-Throughput Artificial Intelligence-Generated Configurations", Solar RRL, 7, 2300594 (2023).
    • [95] Jiachen Wang, Lulu Sun, Sixing Xiong, Baocai Du, Tomoyuki Yokota, Kenjiro Fukuda*, and Takao Someya*, "Flexible Solution-Processed Electron-Transport-Layer-Free Organic Photovoltaics for Indoor Application", ACS Applied Materials & Interfaces, 15, 21314-21323 (2023).
    • [94] Baocai Du, Kenjiro Fukuda*, Tomoyuki Yokota, Daishi Inoue, Daisuke Hashizume, Sixing Xiong, Shinyoung Lee, Masahito Takakuwa, Lulu Sun, Jiachen Wang, and Takao Someya*, "Surface-Energy-Mediated Interfacial Adhesion for Mechanically Robust Ultraflexible Organic Photovoltaics", ACS Applied Materials & Interfaces, 15, 14624-14633 (2023).
    • [93] Steven I. Rich, Masahito Takakuwa, Kenjiro Fukuda*, and Takao Someya*, ACS Applied Materials & Interfaces, 15, 12495-12501 (2023).
    • [92] Zhi Jiang, Nuan Chen, Zhigao Yi, Junwen Zhong, Feilong Zhang, Shaobo Ji, Rui Liao, Yan Wang, Haicheng Li, Zhihua Liu, Yang Wang, Tomoyuki Yokota, Xiaogang Liu, Kenjiro Fukuda*, Xiaodong Chen*, and Takao Someya*, “A 1.3-micrometre-thick elastic conductor for seamless on-skin and implantable sensors”, Nat. Electron., 5, 784-793 (2022).
    • [91]Simin Cheng, Zirui Lou, Lan Zhang, Haotian Guo, Zitian Wang, Chuanfei Guo, Kenjiro Fukuda, Shaohua Ma, Guoqing Wang, Takao Someya, Hui-Ming Cheng, and Xiaomin Xu,“Ultrathin Hydrogel Films Toward Breathable Skin-Integrated Electronics”, Advanced Materials, 35, 2206793 (2023).
    • [90] Lulu Sun, Kenjiro Fukuda, and Takao Someya,“Recent progress in solution-processed flexible organic photovoltaics”, npj Flexible Electronics, 6, 89 (2022).
    • [89] Yujiro Kakei, Shumpei Katayama, Shinyoung Lee, Masahito Takakuwa, Kazuya Furusawa, Shinjiro Umezu, Hirotaka Sato, Kenjiro Fukuda*, and Takao Someya*, “Integration of body-mounted ultrasoft organic solar cell on cyborg insects with intact mobility”, npj Flexible Electronics, 6, 78 (2022).
    • [88] Shuhei Shimanoe, Kenjiro Fukuda, Takao Someya*, and Tomoyuki Yokota*, “Development of Air-Stable Photomultiplication-Type Organic Photodetector and Analysis of Active Layer using Removable Top Electrode”, Advanced Electronic Materials, 8, 202200651 (2022).
    • [87] Barbara Mazzolai*, Alessio Mondini, Wmanuela Del Dottore, , Laura Margheri, Federico Carpi, Koichi Suzumori, Matteo Cianchetti, Thomas Speck, Stoyan K Smoukov, Ingo Burgert, Tobias Keplinger, Gilberto De Freitas Siqueira, Felix Vanneste, Olivier Goury, Christian Duriez, Thrishantha Nanayakkara1, Bram Vanderborght, Joost Brancart, Seppe Terryn, Steven I Rich, Ruiyuan Liu, Kenjiro Fukuda, Takao Someya, Marcello Calisti, Cecilia Laschi, Wenguang Sun, Gang Wang, Li Wen, Robert Baines, Sree Kalyan Patiballa, Rebecca Kramer-Bottiglio, Daniela Rus, Peer Fischer, Friedrich C Simmel, and Andreas Lendlein, “Roadmap on soft robotics: multifunctionality, adaptability and growth without borders”, Multifunctional Materials, 5, 032001 (2022).
    • [86] Jae Joon Kim, Siyoung Hab, Lina Kim, Yutaro Kato, Yan Wang, Chihiro Okutani, Haoyang Wang, Chunya Wang, Kenjiro Fukuda, Sunghoon Lee, Tomoyuki Yokota, Oh Seok Kwon, and Takao Someya,
      “Antimicrobial second skin using copper nanomesh”, Proceedings of the National Academy of Sciences of the United States of America, 119, e220830119 (2022).
    • [85] Steven I. Rich, Shinyoung Lee, Kenjiro Fukuda*,Takao Someya*, “Developing the Nondevelopable: Creating Curved-Surface Electronics from Nonstretchable Devices”, Advanced Materials, 34, 2106683 (2022).
    • [84] Ruiyuan Liu*, Zhong Lin Wang, Kenjiro Fukuda* & Takao Someya*,
      “Flexible self-charging power sources”,
      Nature Reviews Materials, 7, 870-886 (2022).
    • [83] Tomoyuki Yokota*, Iwao Shirayama, Kenji Kuwada, Mari Koizumi, Wakako Yukita, Katsuyuki Morii, Hirohiko Fukagawa, Takahisa Shimizu, Kenjiro Fukuda*, and Takao Someya*,
      “Air-Stable Ultra-Flexible Organic Photonic System for Cardiovascular Monitoring”,
      Advanced Materials Technologies, 7, 2200454 (2022).
    • [82] Tatsuhiro Horii, Toshinori Fujie, Kenjiro Fukuda*, "Flexible Thin-Film Device for Powering Soft Robots", Journal of Robotics and Mechatronics, 34, 227-230 (2022).
    • [81] Koichi Suzumori, Ryuma Niiyama, Kenjiro Fukuda, Kohei Nakajima, "Special Issue on Science of Soft Robots", Journal of Robotics and Mechatronics, 34, 193-194 (2022).
    • [80] Jiachen Wang, Kenjiro Fukuda*, Daishi Inoue, Daisuke Hashizume, Lulu Sun, Sixing Xiong, Tomoyuki Yokota, and Takao Someya*, “Solution-Processed Electron-Transport Layer-free Organic Photovoltaics with Liquid Metal Cathodes”, ACS Applied Materials & Interfaces, 14, 14165-14173 (2022).
    • [79] Sixing Xiong, Kenjiro Fukuda*, Shinyoung Lee, Kyohei Nakano,Xinyun Dong,Tomoyuki Yokota,Keisuke Tajima, Yinhua Zhou, Takao Someya*
      “Ultrathin and Efficient Organic Photovoltaics with Enhanced Air Stability by Suppression of Zinc Element Diffusion”, Advanced Science, 2105288 (2022).
    • [78] Junwen Zhong, Zhaoyang Li, Masahito Takakuwa, Daishi Inoue, Daisuke Hashizume, Zhi Jiang, Yujun Shi, Lexiang Ou, Md Osman Goni Nayeem, Shinjiro Umezu, Kenjiro Fukuda*, Takao Someya*, “Smart Face Mask based on an Ultrathin Pressure Sensor for Wireless Monitoring of Breath Conditions”, Advanced Materials, 34, 2107758 (2022).
    • [77] Haotian Guo, Sakeena Saifi, Kenjiro Fukuda, Hui-Ming Cheng, ZiruiLou∗, Xiaomin Xu*, “Flexible organic photodetectors and their use in wearable systems”, Digital Signal Processing, 125, 103145 (2022).
    • [76] Masahito Takakuwa, Kenjiro Fukuda*, Tomoyuki Yokota, Daishi Inoue, Daisuke Hashizume, Shinjiro Umezu*, Takao Someya*, “Direct gold bonding for flexible integrated electronics”, Science Advances, 7, eabl6228 (2021).
    • [75] Takashi Ohya, Haruki Ohtomo, Tetsutaro Kikuchi, Daisuke Sasaki, Yohei Kawamura, Katsuhisa Matsuura, Tatsuya Shimizu, Kenjiro Fukuda*,, Takao Someya* and Shinjiro Umezu*, “Simultaneous measurement of contractile force and field potential of dynamically beating human iPS cell-derived cardiac cell sheet-tissue with flexible electronics”, Lab on a Chip, 21, 3899-3909 (2021).
    • [74] Akihiro Maeda, Ruiyuan Liu, Kilho Yu, Shinyoung Lee, Kyohei Nakano, Masahito Takakuwa, Shipei Zhang, Keisuke Tajima, Kenjiro Fukuda*, Shinjiro Umezu*, Takao Someya*, “Photoactive layer formation in the dark for high performance of air-processable organic photovoltaics”, Journal of Physics: Materials, 4, 044016 (2021).
    • [73] Hanbee Lee, Zhi Jiang, Tomoyuki Yokota, Kenjiro Fukuda*, Sungjun Park, Takao Someya, “Stretchable organic optoelectronic devices: Design of materials, structures, and applications”, Materials Science & Engineering R, 146, 100631 (2021).
    • [72] Steven I. Rich*, Zhi Jiang, Kenjiro Fukuda, and Takao Someya, “Well-rounded devices: the fabrication of electronics on curved surfaces – a review”, Materials Horizons, 8, 1926-1958 (2021).
    • [71] Hiroaki Jinno, Tomoyuki Yokota, Mari Koizumi, Wakako Yukita, Masahiko Saito, Itaru Osaka, Kenjiro Fukuda, Takao Someya, “Self-powered ultraflexible photonic skin for continuous bio-signal detection via air-operation-stable polymer light-emitting diodes”, Nature Communications, 12, 2234 (2021).
    • [70] Tomoyuki Yokota*, Kenjiro Fukuda, Takao Someya, “Recent progress of flexible image 1 sensors for biomedical application”, Advanced Materials, 33, 2004416 (2021).
    • [69] Tsukuru Minamiki, Tsuyoshi Minami, Yi-Pu Chen, Taisei mano, Yasunori Takeda, Kenjiro Fukuda, Shizuo Tokiyo, "Flexible organic thin-film transistor immunosensor printed on a one-micron-thick film", Commun. Mater., 2, 8 (2021).
    • [68] Zhi Jiang Kilho Yu Haoyang Wang Steven Rich Tomoyuki Yokota Kenjiro Fukuda* Takao Someya*, “Ultraflexible Integrated Organic Electronics for Ultrasensitive Photodetection”, Advanced Materials Technologies, 6, 2000956 (2021).
    • [67] Fei Qin, Wen Wang, Lulu Sun, Xueshi Jiang, Lin Hu, Sixing Xiong, Tiefeng Liu, Xinyun Dong, Jing Li, Youyu Jiang, Jianhui Hou, Kenjiro Fukuda, Takao Someya, and Yinhua Zhou, “Robust metal ion-chelated polymer interfacial layer for ultraflexible non-fullerene organic solar cells”, Nature Communications, 11, 4508 (2020).
    • [66] Kenjiro Fukuda*, Kilho Yu, Takao Someya*, “The Future of Flexible Organic Solar Cells”,
      Advanced Energy Materials      , 10, 2000765 (2020).
    • [65] Ruiyuan Liu, Masahito Takakuwa, Ailong Li, Daishi Inoue, Daisuke Hashizume, Kilho Yu, Shinjiro Umezu, Kenjiro Fukuda*, Takao Someya*, “An Efficient Ultra‐Flexible Photo‐Charging System Integrating Organic Photovoltaics and Supercapacitors”,
      Advanced Energy Materials      , 10, 2000523 (2020).
    • [64] Zhi Jiang, Fanji Wang, Kenjiro Fukuda*, Akchheta Karki, Wenchao Huang, Kilho Yu, Tomoyuki Yokota, Keisuke Tajima, Thuc-Quyen Nguyen, and Takao Someya, “Highly efficient organic photovoltaics with enhanced stability through the formation of doping-induced stable interfaces”, Proceedings of the National Academy of Sciences of the United States of America, 117, 6391-6397 (2020).
    • [63] Masahito Takakuwa, Soo Won Heo, Kenjiro Fukuda*, Keisuke Tajima, Sungiun Park, Shinjiro Umezu*, and Takao Someya*, “Nano-Grating Structured Ultra-Thin Substrate for Ultra-Flexible Organic Photovoltaics”,
      Small Methods, 4, 1900762 (2020).
    • [62] Wenchao Huang, Zhi Jiang, Kenjiro Fukuda*, Xuechen Jiao, Christopher R. McNeill, Tomoyuki Yokota, Takao Someya*, “Efficient and Mechanically Robust Ultraflexible Organic Solar Cells Based on Mixed Acceptors”,
      Joule , 4, 128-141 (2020).
    • [61] Hyunjae Lee, Sunghoon Lee, Wonryung Lee, Tomoyuki Yokota, Kenjiro Fukuda, Takao Someya*, “Ultrathin organic electrochemical transistor with nonvolatile and thin gel electrolyte for long-term electrophysiological monitoring”, Advanced Functional Materials, 29, 1906982 (2019).
    • [60] Yi-Lin Wu, Kenjiro Fukuda*, Tomoyuki Yokota, and Takao Someya*, “Highly Responsive Organic Image Sensor Based on Two-Terminal Organic Photodetector with Photomultiplication”, Advanced Materials, 31, 1903687 (2019).
    • [59] Kilho Yu, Steven Rich, Sunghoon Lee, Kenjiro Fukuda*, Tomoyuki Yokota, and Takao Someya*, “Organic Photovoltaics: Toward Self-Powered Wearable Electronics”, Proceedings of the IEEE, 107, 2137-2154 (2019).
    • [58] Zhi Jiang, Md Osman Goni Nayeem, Kenjiro Fukuda*, Su Ding, Hanbit Jin, Tomoyuki Yokota, Daishi Inoue, Daisuke Hashizume, and Takao Someya*, “Highly Stretchable Metallic Nanowire Networks Reinforced by the Underlying Randomly Distributed Elastic Polymer Nanofibers via Interfacial Adhesion Improvement”, Advanced Materials, 31, 1903446 (2019).
    • [57] Hiroki Kimura, Kenjiro Fukuda*, Hiroaki Jinno, Sungjun Park, Masahiko Saito, Itaru Osaka, Kazuo Takimiya, Shinjiro Umezu*, Takao Someya*, “High Operation Stability of Ultraflexible Organic Solar Cells with Ultraviolet‐Filtering Substrates”, Advanced Materials, 31, 1808033 (2019).
    • [56] Sunghoon Lee, Daisuke Sasaki, Dongmin Kim, Mami Mori, Tomoyuki Yokota, Hyunjae Lee, Sungjun Park, Kenjiro Fukuda, Masaki Sekino, Katsuhisa Matsuura, Tatsuya Shimizu and Takao Someya*, “Ultrasoft electronics to monitor dynamically pulsing cardiomyocytes”, Nature Nanotechnology, 14, 156-160 (2019).
    • [55] Zhi Jiang, Kenjiro Fukuda*, Wenchao Huang, Sungjun Park, Roda Nur, Md Osman Goni Nayeem, Kilho Yu, Daishi Inoue, Masahiko Saito, Hiroki Kimura, Tomoyuki Yokota, Shinjiro Umezu, Daisuke Hashizume, Itaru Osaka, Kazuo Takimiya, and Takao Someya*, “Durable Ultra-flexible Organic Photovoltaics with Novel Metal-Oxide-Free Cathode”, Advanced Functional Materials, 29, 1808378 (2019).
    • [54] Sungjun Park†, Soo Won Heo†, Wonryung Lee†, Daishi Inoue, Zhi Jiang, Kilho Yu, Hiroaki Jinno, Daisuke Hashizume, Masaki Sekino, Tomoyuki Yokota, Kenjiro Fukuda*, Keisuke Tajima*, and Takao Someya*, “Self-powered ultra-flexible electronics via nano-grating-patterned organic photovoltaics”, Nature, 561, 516-521 (2018). (†: equally contributed)
    • [53] Yi-Lin Wu, Naoji Matsuhisa, Peter Zalar, Kenjiro Fukuda*, Tomoyuki Yokota, Takao Someya*, "Low‐Power Monolithically Stacked Organic Photodiode‐Blocking Diode Imager by Turn‐On Voltage Engineering", Advanced Electronic Materials, 4, 1800311 (2018).
    • [52] Sungjun Park, Kenjiro Fukuda, Ming Wang, Chulhyo Lee, Tomoyuki Yokota, Hanbit Jin, Hiroaki Jinno, Hiroki Kimura, Peter Zalar, Naoji Matsuhisa, Shinjiro Umezu, Guillermo C. Bazan, and Takao Someya*, Advanced Materials, 30, 1802359 (2018). (selected as Cover Picture).
    • [51] Zhi Jiang, Kenjiro Fukuda*, Xiaomin Xu, Sungjun Park, Daishi Inoue, Hanbit Jin, Masahiko Saito, Itaru Osaka, Kazuo Takimiya, and Takao Someya*, “Reverse‐Offset Printed Ultrathin Ag Mesh for Robust Conformal Transparent Electrodes for High‐Performance Organic Photovoltaics”, Advanced Materials, 30, 1707526 (2018). (selected as Frontispiece)
    • [50] Xiaomin Xu†, Kenjiro Fukuda†*, Akchheta Karki, Sungjun Park, Hiroki Kimura, Hiroaki Jinno, Nobuhiro Watanabe, Shuhei Yamamoto, Satoru Shimomura, Daisuke Kitazawa, Tomoyuki Yokota, Shinjiro Umezu, Thuc-Quyen Nguyen, and Takao Someya*, “Thermally stable, highly efficient, ultraflexible organic photovoltaics”, Proceedings of the National Academy of Sciences of the United States of America, 115, 4589-4594 (2018). (†: equally contributed)
    • [49] Takashi Ohya, Kazuki Nakazono, Tetsutaro Kikuchi, Daisuke Sasaki, Katsuhisa Sakaguchi, Tatsuya Shimizu, Kenjiro Fukuda, Takao Someya, Shinjiro Umezu, “Simple action potential measurement of cardiac cell sheet utilizing electronic sheet”, Artificial Life and Robotics, 23, 321-327 (2018).
    • [48] A. Sukma Aji, P. Solís Fernández, H. Ji, K. Fukuda, H. Ago*, “High Mobility WS2 Transistors Realized by Multilayer Graphene Electrodes and Application to High Responsivity Flexible Photodetectors”, Advanced Functional Materials, 27, 1703448 (2017).
    • [47] Hiroaki Jinno, Kenjiro Fukuda*, Xiaomin Xu, Sungjun Park, Yasuhito Suzuki, Mari Koizumi, Tomoyuki Yokota, Itaru Osaka, Kazuko Takimiya, and Takao Someya*, “Stretchable and waterproof elastomer-coated organic photovoltaics for washable electronic textile applications”, Nature Energy, 2, 780-785 (2017).
    • [46] Kenjiro Fukuda*, and Takao Someya, "Recent Progress in the Development of Printed Thin-film Transistors and Circuits with High-resolution Printing Technology", Advanced Materials, 29, 1602736 (2017).
    • [45] Rei Shiwaku, Yasunori. Takeda, Takashi Fukuda, Kenjiro. Fukuda, Daisuke Kumaki, and Shizuo Tokito*, "Printed 2 V-operating organic inverter arrays employing a small-molecule/polymer blend", Scientific Reports, 6, 34723 (2016)
    • [44] Jimin Kwon, Yasunori Takeda, Kenjiro Fukuda, Kilwon Cho, Shizuo Tokito*, and Sungjune Jung*, "Three-Dimensional, Inkjet-Printed Organic Transistors and Integrated Circuits with 100% Yield, High Uniformity, and Long-Term Stability", ACS Nano, 10, 10324-10330 (2016).
    • [43] Tomohito Sekine*, Kenjiro Fukuda, Daisuke Kumaki and Shizuo Tokito, "The effect of mechanical strain on contact resistance in flexible printed organic thin-film transistors", Flexible and Printed Electronics, 1, 035005 (2016)."
    • [42] Tomohito Sekine*, Ryo Sugano, Tomoya Tashiro, Kenjiro Fukuda, Daisuke Kumaki, Fabrice Domingues Dos Santos, Atsushi Miyabo, and Shizuo Tokito*, "Fully printed and flexible ferroelectric capacitors based on a ferroelectric polymer for pressure detection", Japanese Journal of Applied Physics, 55, 10TA18 (2016).
    • [41] Ryo Sugano, Yoshinori Hirai, Tomoya Tashiro, Tomohito Sekine, Kenjiro Fukuda, Daisuke Kumaki, Fabrice Domingues dos Santos, Atsushi Miyabo, and Shizuo Tokito*, "Ultrathin flexible memory devices based on organic ferroelectric transistors", Japanese Journal of Applied Physics, 55, 10TA04 (2016)."
    • [40] Kenjiro Fukuda*, Tomohito Sekine, Rei Shiwaku, Takuya Morimoto, Daisuke Kumaki, and Shizuo Tokito, "Free-standing Organic Transistors and Circuits with Sub-micron Thicknesses" , Scientific Reports, 6, 27450 (2016).
    • [39] Yasunori Takeda, Kazuma Hayasaka, Rei Shiwaku, Koji Yokosawa, Takeo Shiba, Masashi Mamada, Daisuke Kumaki, Kenjiro Fukuda, Shizuo Tokito*, "Fabrication of Ultra-Thin Printed Organic TFT CMOS Logic Circuits Optimized for Low-Voltage Wearable Sensor Applications", Scientific Reports, 6, 25714 (2016).
    • [38] Jimin Kwon, Yasunori Takeda, Kenjiro Fukuda, Kilwon Cho, Shizuo Tokito*, and Sungjune Jung*, "Vertically Stacked Complementary Organic Field-Effect Transistors and Logic Circuits Fabricated by Inkjet Printing", Advanced Electronic Materials, 1600046 (2016).
    • [37] Ryo Sugano, Tomoya Tashiro, Tomohito Sekine, Kenjiro Fukuda, Daisuke Kumaki, Shizuo Tokito*, "Enhanced Memory Characteristics in Organic Ferroelectric Field-Effect Transistors through Thermal Annealing" AIP Advances, 5, 117106 (2015).
    • [36] Tomohito Sekine, Kenjiro Fukuda, Daisuke Kumaki*, and Shizuo Tokito, "Enhanced Adhesion Mechanisms between Printed Nano-Silver Electrodes and Underlying Polymer Layers", Nanotechnology, 26, 32101 (2015).
    • [35] Shohei Norita, Daisuke Kumaki*, Yu Kobayashi, Tsubasa Sato, Kenjiro Fukuda, Shizuo Tokito, "Inkjet-Printed Copper Electrodes using Photonic Sintering and their Application to Organic Thin-Film Transistors", Organic Electronics, 25, 131-134 (2015).
    • [34] Tsuyoshi Minami, Tsubasa Sato, Tsukuru Minamiki, Kenjiro Fukuda, Daisuke Kumaki, Shizuo Tokito, "A novel OFET-based biosensor for the selective and sensitive detection of lactate levels", Biosensors and Bioelectronics, 74, 45-48 (2015).
    • [33] Kenjiro Fukuda*, Yudai Yoshimura, Tomoko Okamoto, Yasunori Takeda, Daisuke Kumaki, Yoshinori Katayama, and Shizuo Tokito, "Reverse-offset Printing Optimized for Scalable Organic Thin-film Transistors with Sub-micrometer Channel Lengths", Advanced Electronic Materials, 1, 1500145 (2015).
    • [32] Kenjiro Fukuda*, Tsukuru Minamiki, Tsuyoshi Minami, Makoto Watanabe, Takashi Fukuda, Daisuke Kumaki, and Shizuo Tokito, "Printed organic transistors with uniform electrical performance and their application to amplifiers in biosensors", Advanced Electronic Materials, 1, 1400052 (2015). (Selected as Back Cover)
    • [31] Tomohito Sekine*, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito*, "Highly stable flexible printed organic thin-film transistor devices under high strain conditions using semiconducting polymers", Japanese Journal of Applied Physics, 54, 04DK10 (2015).
    • [30] Yasunori Takeda, Yudai Yoshimura, Faiz Adi Ezarudin Bin Adib, Daisuke Kumaki, Kenjiro Fukuda*, and Shizuo Tokito*, "Flip-flop logic circuit based on fully solution-processed organic thin film transistor devices with reduced variations in electrical performance", Japanese Journal of Applied Physics, 54, 04DK03 (2015).
    • [29] Tsukuru Minamiki, Tsuyoshi Minami*, Daisuke Yokoyama, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito, "Extended-gate organic field-effect transistor for the detection of histamine in water", Japanese Journal of Applied Physics, 54, 04DK02 (2015).
    • [28] Tsuyoshi Minami*, Tsukuru Minamiki, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito, "Cysteine Detection in Water using an Organic Field Effect Transistor (OFET) with an Extended-Gate Gold Electrode", Japanese Journal of Applied Physics, 54, 04DK01 (2015).
    • [27] Rei Shiwaku, Yudai Yoshimura, Yasunori Takeda, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito*, "Control of threshold voltage in organic thin-film transistors by modifying gate electrode surface with MoOX aqueous solution and inverter circuit applications", Applied Physics Letters, 106, 053301 (2015).
    • [26] Tsuyoshi Minami*, Tsukuru Minamiki, Yuki Hashima, Daisuke Yokoyama, Tomohito Sekine, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito, "An extended-gate type organic field effect transistor functionalised by phenylboronic acid for saccharide detection in water", Chemical Communications, 50, 15613-15615 (2014).
    • [25] Tsukuru Minamiki, Tsuyoshi Minami*, Ryoji Kurita, Osamu Niwa, Shin-ichi Wakida, Kenjiro Fukuda, Daisuke Kumaki and Shizuo Tokito, "A Label-Free Immunosensor for IgG Based on an Extended-Gate Type Organic Field Effect Transistor", Materials, 7(9), 6843-6852 (2014).
    • [24] Yudai Yoshimura, Yasunori Takeda, Kenjiro Fukuda*, Daisuke Kumaki, and Shizuo Tokito, "High-speed operation in printed organic inverter circuits with short channel length", Organic Electronics, 15, 2696-2701 (2014).
    • [23] Kenjiro Fukuda*, Yasunori Takeda, Yudai Yoshimura, Rei Shiwaku, Lam Truc Tran, Tomohito Sekine, Makoto Mizukami, Daisuke Kumaki, and Shizuo Tokito, "Fully-printed high-performance organic thin-film transistors and circuitry on one-micron-thick polymer films", Nature Communications, 5, 4147 (2014)."
    • [22] Tsukuru Minamiki, Tsuyoshi Minami*, Ryoji Kurita, Osamu Niwa, Shinichi Wakida, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito, "Accurate and reproducible detection of proteins in water using an extended-gate type organic transistor biosensor", Applied Physics Letters, 104, 243703 (2014).
    • [21] Ryo Sugano*, Yasunori Takeda, Yu Kobayashi, Kenjiro Fukuda, Daisuke Kumaki, and Shizuo Tokito, "Fine patterning method for silver nanoparticle electrodes using differential hydrophobic and hydrophilic surface properties", Japanese Journal of Applied Physics, 53, 04EK01 (2014).
    • [20] Tomohito Sekine, Hideaki Ikeda, Akifumi Kosakai, Kenjiro Fukuda, Daisuke Kumaki*, Shizuo Tokito, "Improvement of mechanical durability on organic TFT with printed electrodes prepared from nanoparticle ink", Applied Surface Science, 294, 20-23 (2014).
    • [19] Kenjiro Fukuda*, Yasunori Takeda, Makoto Mizukami, Daisuke Kumaki and Shizuo Tokito, "Fully Solution-Processed Flexible Organic Thin Film Transistor Arrays with High Mobility and Exceptional Uniformity", Scientific Reports, 4, 3947 (2014).
    • [18] Yasunori Takeda, Yudai Yoshimura, Yu Kobayashi, Daisuke Kumaki, Kenjiro Fukuda*, and Shizuo Tokito*, "Integrated circuits using fully solution-processed organic TFT devices with printed silver electrodes", Organic Electronics, 14, 3362-3370 (2013).
    • [17] Kenjiro Fukuda*, Kenta Hikichi, Tomohito Sekine, Yasunori Takeda, Tsukuru Minamiki, Daisuke Kumaki, and Shizuo Tokito, "Strain sensitivity and durability in p-type and n-type organic thin-film transistors with printed silver electrodes", Scientific Reports, 3, 2048 (2013)."
    • [16] Kenjiro Fukuda*, Yasunori Takeda, Yu Kobayashi, Masahiro Shimizu, Tomohito Sekine, Daisuke Kumaki, Masato Kurihara, Masatomi Sakamoto, and Shizuo Tokito, "Patterning Method for Silver Nanoparticle Electrodes in Fully Solution-Processed Organic Thin-Film Transistors Using Selectively Treated Hydrophilic and Hydrophobic Surfaces", Japanese Journal of Applied Physics, 52, 05DB05 (2013).
    • [15] Kenjiro Fukuda*, Tomohito Sekine, Daisuke Kumaki, and Shizuo Tokito, "Profile Control of Inkjet Printed Silver Electrodes and their Application to Organic Transistors", ACS Applied Materials and Interfaces, 5, 3916-3920 (2013).
    • [14] Kenjiro Fukuda*, Tatsuya Suzuki, Takuma Kobayashi, Daisuke Kumaki, Shizuo Tokito, "Suppression of threshold voltage shifts in organic thin-film transistors with bilayer gate dielectrics", Physica Status Solidi A, 210, 839-844 (2013).
    • [13] Kenjiro Fukuda*, Tomohito Sekine, Yu Kobayashi, Yasunori Takeda, Masahiro Shimizu, Naoya Yamashita, Daisuke Kumaki, Mitsunori Itoh, Minami Nagaoka, Takami Toda, Sayaka Saito, Masato Kurihara, Masatomi Sakamoto, and Shizuo Tokito, "Organic integrated circuits using room-temperature sintered silver nanoparticles as printed electrodes", Organic Electronics, 13, 3296-3301 (2012).
    • [12] Kenjiro Fukuda*, Tatsuya Suzuki, Daisuke Kumaki, and Shizuo Tokito, "Reverse DC bias stress shifts in organic thin-film transistors with gate dielectrics using parylene-C", Physica Status Solidi A, 209, 2073-2077 (2012).
    • [11] Kenjiro Fukuda*, Tomohito Sekine, Yu Kobayashi, Daisuke Kumaki, Mitsunori Itoh, Minami Nagaoka, Takami Toda, Sayaka Saito, Masato Kurihara, Masatomi Sakamoto and Shizuo Tokito, "Stable organic thin-film transistors using full solution-processing and low-temperature sintering silver nanoparticle inks", Organic Electronics, 13, 1660-1664 (2012).
    • [10] Kazunori Kuribara, He Wang, Naoya Uchiyama, Kenjiro Fukuda, Tomoyuki Yokota, Ute Zschieschang, Cherno Jaye, Daniel Fischer, Hagen Klauk, Tatsuya Yamamoto, Kazuo Takimiya, Masaaki Ikeda, Hirokazu Kuwabara, Tsuyoshi Sekitani, Yueh-Lin Loo, and Takao Someya*, "Organic transistors with high thermal stability for medical applications", Nature Communications, 3, 723 (2012)."
    • [9] Kenjiro Fukuda, Tsuyoshi Sekitani, Ute Zschieschang, Hagen Klauk, Kazunori Kuribara, Tomoyuki Yokota, Takushi Sugino, Kinji Asaka, Masaaki Ikeda, Hirokazu Kuwabara, Tatsuya Yamamoto, Kazuo Takimiya, Takanori Fukushima, Takuzo Aida, Makoto Takamiya, Takayasu Sakurai and Takao Someya*, "A 4 V Operation, Flexible Braille Display Using Organic Transistors, Carbon Nanotube Actuators, and Organic Static Random-Access Memory", Advanced Functional Materials, 21, 4019-4027 (2011). Selected as Cover picture"
    • [8] Yoshiaki Nakamura*, Kenjiro Fukuda, Shogo Amari, and Masakazu Ichikawa, "Fe3Si nanodots epitaxially grown on Si(111) substrates using ultrathin SiO2 film technique", Thin Solid Films, 519, 8512-8515 (2011)."
    • [7] Kenjiro Fukuda, Tsuyoshi Sekitani, Tomoyuki Yokota, Kazunori Kuribara, Tsung-Ching Huang, Takayasu Sakurai, Ute Zschieschang, Hagen Klauk, Masaaki Ikeda, Hirokazu Kuwabara, Tatsuya Yamamoto, Kazuo Takimiya, Kwang-Ting Cheng, and Takao Someya*, "Organic Pseudo-CMOS Circuits for Low-Voltage Large-Gain High-Speed Operation", IEEE Electron Device Letters, 32, 1448-1450 (2011).
    • [6] Wen Liu, Juin J. Liou, Kazunori Kuribara, Kenjiro Fukuda, Tsuyoshi Sekitani, Takao Someya, J. Chung, Yoon-Ha Jeong, Zhixin Wang, and Cheng-Li Lin, "Study of Organic Thin-Flim Transistors Under Electrostatic Discharge Stresses", IEEE Electron Device Letters, 32, 967-969 (2011).
    • [5] Tomoyuki Yokota, Takashi Nakagawa, Tsuyoshi Sekitani, Yoshiaki Noguchi, Kenjiro Fukuda, Ute Zschieschang, Hagen Klauk, Ken Takeuchi, Makoto Takamiya, Takayasu Sakurai, and Takao Someya, "Control of threshold voltage in low-voltage organic complementary inverter　circuits with floating gate structures", Applied Physics Letters, 98, 193302 (2011). "
    • [4] Tsung-Ching Huang, Kenjiro Fukuda, Chun-Ming Lo, Yung-Hui Yeh, Tsuyoshi Sekitani, Takao Someya, Kwang-Ting Cheng, "Pseudo-CMOS: A Design Style for Low-Cost and Robust Flexible Electronics”, IEEE Transactions on Electron Devices, 58, 141 (2011).
    • [3] Kenjiro Fukuda, Tomoyuki Yokota, Kazunori Kuribara, Tsuyoshi Sekitani, Ute Zschieschang, Hagen Klauk, and Takao Someya*, “Thermal stability of organic thin-film transistors with self-assembled monolayer dielectrics”, Applied Physics Letters, 96, 053302 (2010)."
    • [2] Kenjiro Fukuda, Takanori Hamamoto, Tomoyuki Yokota, Tsuyoshi Sekitani, Ute Zschieschang, Hagen Klauk, and Takao Someya*, “Effects of the alkyl chain length in phosphonic acid self-assembled monolayer gate dielectrics on the performance and stability of low-voltage organic thin-film transistors", Applied Physics Letters, 95, 203301 (2009)."
    • [1] Kenjiro Fukuda, Tsuyoshi Sekitani, Takao Someya*, “Effects of annealing on electronic and structural characteristics of pentacene thin-film transistors on polyimide gate dielectrics”, Applied Physics Letters, 95, 023302 (2009).

    Proceedings

    • [2] T.-C. Huang, K. Fukuda, C.-M. Lo, Y.-H. Yeh, T. Sekitani, T. Someya, K.-T. Cheng, “Pseudo-CMOS: A Novel Design Style for Flexible Electronics”, Design, Automation & Test in Europe Conference & Exhibition (DATE), pp.154-159 (2010).
    • [1] Y. Kato, S. Iba, T. Sekitani, Y. Noguchi, K. Hizu, X. Wang, K. Takenoshita, Y. Takamatsu, S. Nakano, K. Fukuda, K. Nakamura, T. Yamaue, M. Doi, K. Asaka, H. Kawaguchi, M. Takamiya, T. Sakurai, and T. Someya, “A Flexible, Lightweight Braille Sheet Display with Plastic Actuators Driven by An Organic Field-Effect Transistor Active Matrix”, International Electron Device Meeting, pp.105-108 (2005).

    Invited Talks

    • [103] 福田憲二郎, 染谷隆夫, “超薄型・塗布プロセスによる有機太陽電池高性能化と応用”, 第21回「次世代の太陽光発電システム」シンポジウム（第4回日本太陽光発電学会学術講演会）, 広島国際会議場, 広島県, 2024/7/12.
    • [102] K. Fukuda, T. Someya, “Ultrathin Organic Photovoltaics for Emerging Applications”, Chinese Materials Conference 2024 & The 2nd World Materials Conference (CMC & WMC 2024), Guangzhou, China, 2024/7/10.
    • [101] K. Fukuda, T. Someya, “Ultrathin Organic electronics for healthcare devices”, Nano Korea 2024, Seoul, South Korea, 2024/7/4.
    • [100] K. Fukuda, T. Someya, “Ultrathin Organic photonics and electronics for wearable applications”, Workshop on Nanomaterial innovations: Pioneering the Future of Healthcare, Seoul National University, South Korea, 2024/7/2.
    • [99] K. Fukuda, T. Someya, “Flexible organic photovoltaics having extreme thinness and light-weight properties: Challenges and potential applications”, InInternational Conference on Science and Technology of Synthetic Electronic Materials (ICSM 2024), S-57-05, Dresden, Germany, 2024/6/27.
    • [98] K. Fukuda, T. Someya, “Ultrathin Organic Photovoltaics for Emerging Applications”, International Symposium on Polmer Physics 2024 (PP’2024), Chongqing, China, 2024/6/12.
    • [97] K. Fukuda, T. Someya, “Ultrathin Organic electronics for conforming to any shaped curved surface”, IUMRS-ICEM 2024, SE6-I1, City University of Hong Kong, Hong Kong, 2024/5/19.
    • [96] K. Fukuda, T. Someya, “Ultra-flexible organic solar cells for next-generation power sources”, Sino-German Workshop on Printable Photovoltaics, Huazhong University of Science and Technology (HUST), Wuhan, China, 2024/4/17.
    • [95] K. Fukuda, T. Someya, “Very Thin and Lightweight Flexible Organic Solar Cells: Performance and Potential Applications”, 2nd International Emerging PV workshop (EPVW2) at Next Generation Solar Energy (NGSE8), the Friedrich-Alexander University Erlangen-Nürnberg, Germany, 2023/12/14.
    • [94] 福田 憲二郎, 染谷 隆夫, “超柔軟かつ軽量な有機太陽電池の基礎と応用”, 第35回　高分子学会関東支部茨城地区若手の会交流会, 独立行政法人教員支援機構, 茨城県, 2023/10/31 (2023).
    • [93] Kenjiro Fukuda and Takao Someya, “Performance Improvement and Potential Applications of Ultrathin Organic Solar Cells”, 244th ECS Meeting, I02-2179, Gothenburg, Sweden, 2023/10/11 (2023).
    • [92] Kenjiro Fukuda and Takao Someya, “Ultrathin organic solar cells for next-generation applications in wearable electronics and soft robots”, RIKEN-NCHU Joint Symposium, National Chung Hsing University, Taiwan, 2023/9/1 (2023).
    • [91] 福田 憲二郎, 染谷 隆夫, “フレキシブルデバイスの現状と今後の展開”, 一般社団法人　電子情報技術産業協会シーンオリエンテッド先端実装技術分科会, JEITA会議室, 東京都, 2023/8/2 (2023).
    • [90] Kenjiro Fukuda and Takao Someya, “Ultrathin organic solar cells: basics and applications”, iCANX, Online, 2023/8/1 (2023).
    • [89] 福田 憲二郎, 染谷 隆夫, “超薄型エレクトロニクスを利用したウェアラブルデバイス・ソフトロボティクス応用 ”, 日本学術振興会R025先進薄膜界面機能創成委員会 第14回研究会, 東京大学本郷キャンパス, 東京都, 2023/6/27 (2023).
    • [88] Kenjiro Fukuda and Takao Someya, “Rechargeable cyborg insects using ultrathin organic solar cell”, EM-NANO2023, H-2, Ishikawa Industrial Promotion Center, Ishikawa, Japan, 2023/6/7 (2023).
    • [87] Kenjiro Fukuda and Takao Someya, "Ultrathin organic solar cells for wearable/soft robot applications", IEEE EDTM2023, 46E-1, Coex, Seoul, Korea, 2023/3/9 (2023).
    • [86] 福田 憲二郎, 染谷 隆夫, "世代ウェアラブルエレクトロニクスに向けたフレキシブル・伸縮性デバイスの開発", 第9回 ウェアラブル EXPO セミナー[WEA-S3], 東京ビッグサイト, 東京都, 2023/1/27 (2023).
    • [85] 福田 憲二郎, "有機電子素子の基礎", 化学技術基礎講座, オンライン, 2022/12/13 (2022).
    • [84] 福田 憲二郎, 染谷隆夫, "柔軟な有機太陽電池ー生体との親和性の高い発電技術を目指してー", 22-2有機エレクトロニクス研究会「カーボンニュートラル実現にむけた有機薄膜太陽電池の新展開」, RCC文化センター, 広島県, 2022/12/8 (2022).
    • [83] 福田 憲二郎, "フレキシブル有機太陽電池の作製技術と特性向上、応用展開", 技術情報協会「フレキシブル・透明太陽電池の開発動向とその高効率化、応用展開」, オンライン, 2022/12/6 (2022).
    • [82] 福田 憲二郎、染谷 隆夫, "超薄型エレクトロニクスの性能向上と集積化デバイス", 第183回有機エレクトロニクス研究センター講演会, 山形大学工学部, 2022/10/31 (2022).
    • [81] Kenjiro Fukuda and Takao Someya, "Thin and Flexible Organic Photovoltaics: Advanced Applications for Wearable Electronics and Soft Robots", ICEAN2022, Newcastle, Australia, 2022/10/20 (2022).
    • [80] 福田 憲二郎、高桑 聖仁, 染谷 隆夫, "超薄型・柔軟エレクトロニクス用途を目指した高分子フィルム上金の直接接合技術", 接着・接合技術コンソーシアム　第3回電池接着ワーキンググループ, オンライン, 2022/10/6 (2022).
    • [79] 福田 憲二郎、筧裕二朗, 片山俊平, Shinyoung Lee, 高桑聖仁, 古澤和也, 梅津信二郎, 佐藤裕崇, 染谷 隆夫, "超薄型有機太陽電池を利用した再充電可能なサイボーグ昆虫", 第32回フレキシブル医療IT研究会, 東京大学, 東京都, 2022/10/4 (2022).
    • [78] 福田 憲二郎、染谷 隆夫, "超薄型有機太陽電池を用いたウェアラブルエレクトロニクスへの電力供給技術", 第252回有機エレクトロニクス材料研究会(JOEM), Online, 2022/9/16 (2022).
    • [77] Kenjiro Fukuda and Takao Someya, "Ultrathin Solar Cells -The Basic Performance and Potential Applications-", RIKEN-NTU NTU NEUROSCIENCE WORKSHOP, Lee Kong Chian School of Medicine Clinical Sciences Building, Novena HQ Learning Studio, Singapore, 2022/9/5 (2022).
    • [76] 福田 憲二郎、染谷 隆夫, "超薄型有機太陽電池の基礎と応用", 2022年 第17回 有機デバイス・物性院生研究会, T1, 山形大学 米沢キャンパス, Japan, 2022/7/20 (2022).
    • [75] Kenjiro Fukuda and Takao Someya, "Advanced Technologies for Ultra-Flexible and Highly Stable Organic Solar Cells", THE 29th INTERNATIONAL WORKSHOP ON ACTIVE-MATRIX FLATPANEL DISPLAYS AND DEVICES (AM-FPD22), 1_2, Kyoto, Japan, 2022/7/7 (2022).
    • [74] Kenjiro Fukuda and Takao Someya, "Flexible and Reliable Organic Solar CellS", CIMTEC2022 9th Forum on New Materials, FB-3:IL11, Perugia, Italy, 2022/6/29 (2022).
    • [73] 福田憲二郎、染谷隆夫, "超薄型有機電子素子を利用したウェアラブルエレクトロニクス応用の可能性", 表面改質技術研究委員会　本委員会,　オンライン, 2022/6/21 (2022).
    • [72] 福田憲二郎、染谷隆夫, "有機材料を用いたIoTセンサ用超軽量発電技術", センサ＆IoTコンソーシアムセミナー,　オンライン, 2022/6/6 (2022).
    • [71] Kenjiro Fukuda, "Strategies of Ultraflexible Organic Devices Toward Self-Powered Bioelectronic Applications", 2022 MRS Spring MEeting & Exhibit, SB04.06.01, Honolulu, Hawaii, 2022/5/11 (2022).
    • [70] (Short course lecture) Kenjiro Fukuda, "Potentials of ultra-thin electronics and photonics to contribute to the SDGs",The 6th Electron Devices Technology and Manufacturing Conference (EDTM 2022), online, 2022/3/06 (2022).
    • [69] 福田憲二郎、染谷隆夫, "超薄型有機電子素子を利用した集積化デバイスの実現とウェアラブルエレクトロニクス応用", 第２４回『トライボコーティングの現状と将来』シンポジウム, 鈴木梅太郎ホール, 理研、2022/2/25 (2022).
    • [68] (Keynote) Kenjiro Fukuda and Takao Someya, "Ultraflexible organic electronic devices for self-powered applications", 1st International Conference on Energy Materials (ICEM2021), online, A-01558, 2021/11/08 (2021).
    • [67] Kenjiro Fukuda and Takao Someya, "Ultraflexible organic electronics: toward wearable applications", RIKEN-NYCU Joint Symposium, online, 2021/10/19 (2021).
    • [66] Kenjiro Fukuda and Takao Someya, "Ultra-Flexible Organic Integrated Systems for Self-Powered Sensors", IUMRS-ICA 2021, WeI3-2, online, 2021/10/08 (2021).
    • [65] Kenjiro Fukuda and Takao Someya, "Ultrathin organic solar cells: performance, stability, and applications", The 11th International Conference on Flexible and Printed Electronics (ICFPE2021), 1Rm101-10-07, online, 2021/9/27 (2021).
    • [64] Kenjiro Fukuda and Takao Someya, "Recent Progress of Ultraflexible Organic Solar Cells and Photodetectors", The 21st international Meeting on Information Display (iMiD2021), COEX, Seoul Korea & online, 2021/8/27 (2021).
    • [63] 福田憲二郎、染谷隆夫, "有機太陽電池の薄型化・高効率化・高安定化への取り組みと応用", 電子情報技術部会 ナノフォトニクスエレクトロニクス交流会 講演会「有機薄膜太陽電池の最新動向」, online, 2021/7/16 (2021).
    • [62] Kenjiro Fukuda, "How to prepare presentation slides?", Young Researchers Society for Flexible and Stretchable Electronics 2nd event, online, 2021/6/15 (2021).
    • [61] (Keynote) Kenjiro Fukuda, Takao Someya, "Recent Progress of Ultraflexible Organic Electronic Devices – From Energy Harvesting to Sensors", 2021 International Forum on Graphene in Shenzhen, 2021/4/9, online (2021).
    • [60] 福田 憲二郎, "超薄型有機太陽電池が切り拓くウェアラブルエレクトロニクスへの電源供給技術", 2020/12/4, 第4 4 回ポリマー光部品(POC)研究会, オンライン (2020).
    • [59] Kenjiro Fukuda, Ruiyuan Liu, Zhi Jiang, Kilho Yu, and Takao Someya, "Flexible organic solar cells and integrated systems for wearable electronics", 2020/12/1, 2020 Virtual MRS Spring/Fall Meeting & Exhibit, F.FL03.03.02, online (2020).
    • [58] Kenjiro Fukuda, Tomoyuki Yokota, Zhi Jiang, Sunghoon Lee, Wenchao Huang, Hyunjae Lee1 and Takao Someya, "Ultra-thin organic photovoltaics and sensors for wearable sensors", 2020/12/1, 2020 Virtual MRS Spring/Fall Meeting & Exhibit, S.SM04.02.03, online (2020).
    • [57] 福田 憲二郎, "超薄型有機太陽電池による自立駆動型システム", 2020/12/4, 第29回ポリマー材料フォーラム, B-8, オンライン (2020).
    • [56] 福田 憲二郎, "有機太陽電池の薄型化と高性能化、その応用可能性について ", 2020/11/16, TIA-EXA広域エレクトロニクス融合セミナー, オンライン (2020).
    • [55] 福田 憲二郎, 染谷隆夫, "超柔軟有機太陽電池を利用したウェアラブルエレクトロニクスの可能性", 2020/4/30, FMIT研究会(動画コンテンツ) (2019).
    • [54] 福田 憲二郎, "フレキシブル太陽電池を利用したウェアラブルエレクトロニクス応用の可能性", 理化学研究所 創発物性科学研究センター(CEMS) セミナー プリンテッドエレクトロニクスの研究開発動向, 2019/12/13, 理化学研究所東京連絡事務所 (2019).
    • [53] (Keynote) Kenjiro Fukuda, Kilho Yu, Steven Rich and Takao Someya, "Toward flexible movement of soft robots: the possibility of ultraflexible/stretchable electronic devices", 30th 2019 International Symposium on Micro-NanoMechatronics and Human Science (MHS2019), MP1-2, 2019/12/2, Nagoya University, Aichi, Japan (2019).
    • [52] 福田 憲二郎, "柔軟性に優れた薄型有機太陽電池の現状と可能性やわらかな有機エレクトロニクスが創世するしなやかな動き", 第4回フロンティア太陽電池セミナー, 2019/11/26, 広島市文化交流会館 (2019).
    • [51] (基調講演) 福田 憲二郎, "やわらかな有機エレクトロニクスが創世するしなやかな動き", 第2回ソフトロボット創世シンポジウム「ソフトロボットの新学術×産学共創」, 2019/9/12, 山形大学米沢キャンパス (2019).
    • [50] 福田 憲二郎, Zhi Jiang, Kilho Yu, Steven Rich, 染谷 隆夫, "しなやかな動きを創る―変形自在の太陽電池ー", 日本機械学会2019年度年次大会 先端技術フォーラム, 2019/9/10, 秋田大学手形キャンパス (2019).
    • [49] Kenjiro Fukuda, "A02研究班「しなやかな動き」",第37回日本ロボット学会学術講演会オープンフォーラム「科研費新学術領域ソフトロボティクス」, 2019/9/3, 早稲田大学 (2019).
    • [48] 福田憲二郎 "Ultra-flexible organic solar cells and their applications to self-powered wearable electronics", RIKEN-NCHU Joint Symposium, 2019/8/31, National Tsung Shing University, Taiwan (2019).
    • [47] Kenjiro Fukuda and Takao Someya, "Ultra-thin organic solar cells for self-powered wearable electronics", Symposium of “Carbon-based Nanodevices and Flexible Electronics”, 2019/8/10, Peking University, Biejing, China (2019).
    • [46] Kenjiro Fukuda, "Ultra-Flexible Organic Solar Cells for Power Solutions of Wearable Electronics", SPIE Optics+Photonics, 11094-18, 2019/8/14, San Diego, CA, USA (2019).
    • [45] 福田憲二郎 "基礎から学ぶプリンテッド エレクトロニクス材料・プロセス技術", 化学技術基礎講座　電子部品・材料の物性化学―最先端産業を支える電子・光学材料開発に必須の基礎をマスターしよう―, 2019/7/26, 化学会館 (2019).
    • [44] （キーノート講演）福田憲二郎、染谷隆夫 "実用化が進むテキスタイル型太陽電池の動向", 最先端実装技術シンポジウム, 2019/6/5, 東京ビッグサイト (2019).
    • [43] Kenjiro Fukuda and Takao Someya, "Toward Self-Powered and Skin-Conformal Sensor Devices - Integration of Ultra-Thin Sensors with Organic Solar Cells-", 235th ECS Meeting, 2092, 2019/5/29, Dallas, TX, USA (2019).
    • [42] 福田憲二郎, 染谷隆夫 “超薄型有機太陽電池が生み出す、無意識エレクトロニスの可能性", ポリマーフロンティア21, , 2019/4/24, 東工大蔵前会館, 東京都.
    • [41] Kenjiro Fukuda, Takao Someya, “Ultra lightweight organic solar cells as power solution for soft robotics", Robosoft2019 Workshop on “Toward the nature of information processing in soft machines”, 2019/4/14, COEX, Seoul, Korea.
    • [40] 福田憲二郎, 染谷隆夫 “超薄型有機デバイスを用いた自立駆動型センサ実現に向けた取り組み", 電気化学会第86回大会, 2019/3/27, 1F20, 京都大学吉田キャンパス, 京都府.
    • [39] 福田憲二郎, “薄くて軽い、有機太陽電池のもつ可能性”, ２０１８年度Ｐ＆Ｉ研究会シンポジウム「2次元を飛び出した印刷技術」, 2018/12/12, DIC（株）会議室, 東京都.
    • [38] Kenjiro Fukuda and Takao Someya, “Ultrathin and Light-Weight Organic Solar Cells as the Power Source for Soft Robots”, Materials Research Society (MRS) 2018 Fall Meeting & Exhibit, GI02.09.03, 2018/11/28, Hynes Convention Center, Boston, Massachusetts, USA.
    • [37] Kenjiro Fukuda and Takao Someya, "Ultraflexible solar cells and photodetectors: towards conformal photonic systems", International Conference on Emerging Advanced Nanomaterials (ICEAN) 2018, 4C-IL-3, 2018/10/31, NEX Newcastle, NSW, Australia (2018).
    • [36] 福田憲二郎、 "私たちの活動に溶け込むデバイスの創生", 日本化学秋季事業　第８回CSJ化学フェスタ2018, 2018/10/23, 船堀タワーホール、東京都 (2018).
    • [35] Kenjiro Fukuda and Takao Someya, "Flexible and printable organic solar cells for high-performance and stable operation", 4DMS2018, 127, 2018/8/27, DCC, Daejeon, Korea (2018).
    • [34] Kenjiro Fukuda and Takao Someya, "Stretchable and Waterproof Organic Solar Cells", IUMRS-ICEM 2018, Fr-F1-2, 2018/8/24, DCC, Daejeon, Korea (2018).
    • [33] 福田憲二郎 "基礎から学ぶプリンテッド エレクトロニクス材料・プロセス技術", 化学技術基礎講座　電子部品・材料の物性化学―最先端産業を支える電子・光学材料開発に必須の基礎をマスターしよう―, 2018/7/26, 化学会館 (2018).
    • [32] 福田憲二郎, "薄くて軽くて安定な有機太陽電池 の実現に向けて", 有機エレクトロニクス材料研究会第229回研究会, 新宿ＮＳビル, 東京都.
    • [31] Kenjiro Fukuda, Hiroaki Jinno, Takao Someya, "Ultraflexible/stretchable Organic Solar Cells: Toward Wearable Electronic Systems", The 35th International Conference of Photopolymer Science and Technology, A-89, 2018/6/28, Makuhari Messe, Chiba, Japan.
    • [30] Kenjiro Fukuda, Hiroaki Jinno, Takao Someya, "Ultraflexible/stretchable Organic Solar Cells: Toward Wearable Electronic Systems", The 35th International Conference of Photopolymer Science and Technology, A-89, 2018/6/28, Makuhari Messe, Chiba, Japan.
    • [29] 福田憲二郎, "洗濯可能な超薄型有機太陽電池:安定性と高効率の両立についての取り組み", フレキシブル医療IT 第１５回研究会, 2018/6/25, 東京大学弥生講堂.
    • [28] Kenjiro FUkuda, Hiroaki Jinno, Xiaomin Xu, Sungjun Park, Takao Someya, "Ultraflexible organic solar cells: approaches to high performance and stable operation", 10th International Symposium on Organic Molecular Electronics (ISOME 2018), I2-2, 2018/5/31, Sunmesse Tosu, Saga, Japan
    • [27] 福田憲二郎, 甚野裕明, 染谷隆夫 "耐水性の伸縮性有機太陽電池", 日本化学会第98春季年会(2018), 3A4-47, 2018/3/20, 日本大学理工学部　船橋キャンパス.
    • [26] 福田憲二郎, 染谷隆夫 "アクチュエータへの実装を目指した超フレキシブル有機エレクトロニクスの開発", 日本化学会第98春季年会(2018), 1A5-38, 2018/3/22, 日本大学理工学部　船橋キャンパス.
    • [25] Kenjiro Fukuda, Hiroaki Jinno, Xiaomin Xu, Sungjun Park and Takao Someya "Development of Ultrathin, High Performance and Stable Organic Photovoltaic Devices", CEMSupra 2018, 2018/1/10, Ito hall, The University of Tokyo, Japan (2018).
    • [24] 福田憲二郎, 染谷 隆夫 "洗濯可能な超薄型有機太陽電池", 有機エレクトロニクス研究会, 2017/12/13, 化学会館7階ホール (2017).
    • [23] 福田憲二郎 "基礎から学ぶプリンテッド エレクトロニクス材料・プロセス技術", 2017印刷・情報・電子用材料研究会基礎講座「基礎から学ぶ有機半導体材料/光機能材料＆印刷成膜技術, July 14th, 産業技術総合研究所　臨海副都心センター別館11階 会議室1 (2017).
    • [22] 福田憲二郎 "基礎から学ぶプリンテッド エレクトロニクス材料・プロセス技術", 化学技術基礎講座　電子部品・材料の物性化学―最先端産業を支える電子・光学材料開発に必須の基礎をマスターしよう―, 2017/7/20, 化学会館 (2017).
    • [21] Kenjiro Fukuda, Hiroaki Jinno, Xiaomin Xu, Sungjun Park, and Takao Someya "Toward ultra-flexible and highly stable organic solar cells: Materials and Technologies", The 34th International Conference of Photopolymer Science and Technology, A-96, June 29th, Makuhari Messe, Chiba, Japan (2017).
    • [20] Kenjiro Fukuda, Hiroaki Jinno, Xiaomin Xu, Sungjun Park, and Takao Someya "Ultra-thin and Large-area Organic Electronic Devices for Wearable Applications", 9th International Conference on Materials for Advanced Technologies (ICMAT2017), R-06-1, June 21st, Suntec Singapore, Singapore (2017).
    • [19] Kenjiro Fukuda, Hiroaki Jinno, Xiaomin Xu, Sungjun Park, Tomoyuki Yokota, and Takao Someya, "Ultraflexible opto-electrical devices", 9th International Conference on Materials for Advanced Technologies (ICMAT2017), J-01-3, June 19th, Suntec Singapore, Singapore (2017).
    • [18] Kenjiro Fukuda, Takao Someya, "Printed Integrated Circuits and power sources with Ultimate Thinness", 12th International Conference on Nano-Molecular Electronics (ICNME), S4-I-1, December 15th, Kobe International Conference Center, Kobe, Japan (2016).
    • [17] Kenjiro Fukuda, "Recent progress of fully-printed and ultra-flexible integrated circuits", 16th INTERNATIONAL CONFERENCE ON NANOTECHNOLOGY (IEEE NANO 2016), WePM18, August 24th, Sendai International Center, Miyagi, Japan (2016).
    • [16] 福田 憲二郎, "印刷技術を用いた軽量・大面積有機電子デバイスの作製と応用展開の可能性", 第10回集積化MEMS技術研究会, 東大駒場リサーチキャンパス, 東京都, 2016年5月20日.
    • [15] Kenjiro Fukuda, Shizuo Tokito, "Printed organic thin-film transistors with excellent electrical uniformity", Eighth International Conference on Molecular Electronics and Bioelectronics (M&BE8), Tower Hall Funabori, Tokyo, Japan, 24th, June (2015).
    • [14] Kenjiro Fukuda, Shizuo Tokito, "Fully-printed organic integrated circuits with high mobility, exceptional uniformity and ultra-flexibility", EMN EAST Meeting Energy Materials Nanotechnology, 20-23 April, Beijing Xijiao Hotel, Beijing, China (2015).
    • [13] Kenjiro Fukuda, "Fully-printed and Ultraflexible Organic Integrated Circuits", BIT's Annual World Congress of Smart Materials-2015 (WCSM), Session603, 24th March, Busan Exhibition & Convention Center (BEXCO), Republic of Korea (2015).
    • [12]福田憲二郎, "超薄型フィルム上の大面積全印刷有機集積回路", ふくしまものづくり企業交流会, コラッセふくしま, 2015年1月20日.
    • [11]福田憲二郎, "全印刷型有機集積回路～高性能化、高均一化、軽量化への取り組み～", プリンテッド・エレクトニクス研究会　第4回研究会, 国立オリンピック記念青少年総合センター, 東京都, 2015年1月16日.
    • [10] K. Fukuda, Y. Takeda, and S. Tokito "Fully-Printed Organic TFTs and Circuits on Ultra-Flexible Substrates", The 21st International Display Workshops (IDW'14), FLX4-2, 4th December, Toki Messe Niigata Convention Center, Niigata, Japan (2014).
    • [9] 福田憲二郎"印刷手法による高性能トランジスタ型有機メモリ素子の開発", 第4回A-STEP発 新技術説明会, 12, JST東京本部別館ホール, 2014年11月28日.
    • [8] 福田憲二郎, 時任静士, "高分子フィルム上に形成する軽量・大面積有機集積回路", プラスチック成形加工学会大143回講演会, 山形, 2014年9月11日.
    • [7]福田憲二郎, 時任静士, "印刷で作る柔らかな集積回路", 平成26年度産学交流夏季セミナー, 平成26年8月28日.
    • [6]福田憲二郎, 時任静士, "オール印刷型フレキシブル有機集積回路実現を目指した基盤研究", 情報科学用有機材料第１４２委員会「有機光エレクトロニクス部会　第５８回研究会」－プリンタブル・エレクトロニクスの最前線－, 東京理科大学森戸記念館, 東京都, 2014年1月21日
    • [5] 福田憲二郎, 時任静士, "インクジェット印刷による有機トランジスタの作製と高性能化", 第二回アンビエント技術セミナー『PE(Printed Electronics)が求める次世代材料 ープロセスの現状と材料課題ー』, 富士フイルム（株）東京ミッドタウン本社, 東京都, 2014年1月16日
    • [4] 福田憲二郎, 時任静士, "印刷型有機TFTの高性能化と集積回路応用", JOEMアカデミー2013第2回, 山形大学工学部, 山形県, 2013年10月4日
    • [3] 福田憲二郎，引地健太，竹田泰典，南木創，小林拓磨，関根智仁，熊木大介，時任静士, "インクジェット銀電極を用いたフレキシブル有機トランジスタの実現", 第60回応用物理学関係連合講演会, 28a-G15-6, 神奈川工科大学, 神奈川県, 2013年3月28日.　(講演奨励賞受賞記念講演)
    • [2] 福田憲二郎, 時任静士, “Printed Organic TFTs and Integrated Circuits", nanotech 2013 シーズ＆ニーズセミナー B "Applications of Nanotechnology in Electronics, Energy and Mobility", 東京ビッグサイト, 東京都, 2013年1月31日.
    • [1] 福田憲二郎, 時任静士, "印刷で作る有機TFTの高性能化とフレキシブルデバイスへの応用", マイクロ・ナノファブリケーション研究会第１８回公開研究会, 回路会館, 東京都, 2012年12月11日.

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