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High Voltage Bifacial Amorphous Si Quintuple-Junction Solar Cells for IoT Devices

Research Project

Project/Area Number 19H00773
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 21:Electrical and electronic engineering and related fields
Research InstitutionTokyo City University

Principal Investigator

Konagai Makoto  東京都市大学, 付置研究所, 教授 (40111653)

Co-Investigator(Kenkyū-buntansha) 石川 亮佑  東京都市大学, 付置研究所, 准教授 (50637064)
齊藤 公彦  福島大学, 共生システム理工学類, 特任教授 (70704203)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥44,200,000 (Direct Cost: ¥34,000,000、Indirect Cost: ¥10,200,000)
Fiscal Year 2021: ¥8,970,000 (Direct Cost: ¥6,900,000、Indirect Cost: ¥2,070,000)
Fiscal Year 2020: ¥14,300,000 (Direct Cost: ¥11,000,000、Indirect Cost: ¥3,300,000)
Fiscal Year 2019: ¥20,930,000 (Direct Cost: ¥16,100,000、Indirect Cost: ¥4,830,000)
Keywords太陽電池 / アモルファスシリコン / 多接合太陽電池 / 両面受光 / IoT機器用電源
Outline of Research at the Start

IoT機器に用いられるセンサーなどの自立電源として、動作電圧3以上の高電圧・両面受光5接合シリコン薄膜太陽電池を開発する。本研究の特徴は、従来、太陽電池の高電圧化のために用いられている集積化による配線を行うことなく、多接合構造によってIoT機器を動作させるに十分な電圧を得ることにある。また、多接合セルの各光吸収層を実現可能な範囲の厚さまで狭くするため、両面受光構造を採用するとともに、裏面からの光導入構造を考案する。さらにグラフェンをはく離のための中間層に用いたフレキシブルな高電圧シリコン薄膜太陽電池の形成技術を確立する。

Outline of Final Research Achievements

As an independent power source for IoT devices, we have developed a bifacial multi-junction amorphous Si solar cell that can operate even in low illuminance. With the aim of improving the characteristics, we optimized the i-layer film thickness and bandgap by the plasma CVD method, introduced a microcrystalline phase into the dope layer, and developed various leakage current suppression technologies. As a result, we succeeded in preparing a 6-junction amorphous Si solar cell showing an open circuit voltage of 4.56 V under irradiation of 1000 lx. In addition, we succeeded in obtaining an open circuit voltage of 3.91 V even under ultra-low illuminance of 100 lx. We have also succeeded in preparing a flexible multi-junction solar cell on a polyimide film in addition to a glass substrate.

Academic Significance and Societal Importance of the Research Achievements

本研究では、センサ等のIoT機器用独立電源としての高電圧太陽電池を開発した。太陽電池を用いる場合の課題は、動作電圧を高めるための配線技術である。従来技術では、動作電圧を高めるためレーザ加工を用いた集積化技術が広く用いられてきた。一方、本研究では、レーザ加工を用いなくても、多接合太陽電池構造を用いれば、センサを十分駆動可能な高電圧が得られることを実証した。またガラス基板に加えて、フレキシブルなフィルム上への形成に成功した。フレキシブル多接合アモルファスシリコン太陽電池を用いれば、mmサイズの小さなものから、数mサイズのものまで、用途に応じて大きなフィルムから切り出すことが可能である。

Report

(5 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Annual Research Report
  • 2019 Comments on the Screening Results   Annual Research Report
  • Research Products

    (23 results)

All 2021 2020 2019 Other

All Journal Article (4 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results) Presentation (16 results) (of which Int'l Joint Research: 5 results) Remarks (3 results)

  • [Journal Article] Flexible Bifacial Amorphous Si Quintuple- and Sextuple-Junction Solar Cells for Internet of Things Devices2020

    • Author(s)
      Makoto Konagai, Hiroshi Noge and Ryousuke Ishikawa
    • Journal Title

      Progress in Photovoltaics Res Appl.

      Volume: - Issue: 7 Pages: 1-7

    • DOI

      10.1002/pip.3335

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Flexible Bifacial Amorphous Si Quintuple- and Sextuple-Junction Solar Cells for IoT Devices2020

    • Author(s)
      Makoto Konagai, Hiroshi Noge and Ryousuke Ishikawa
    • Journal Title

      Proc. 37th EU PVSEC 2020

      Volume: - Pages: 295-301

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Bifacial Amorphous Si Quintuple-Junction Solar Cells for IoT Devices with High Open-Circuit Voltage of 3.5V under Low Illuminance2019

    • Author(s)
      Makoto Konagai and Ryo Sasaki
    • Journal Title

      Prog. Photovol. Res. Appl.

      Volume: - Issue: 6 Pages: 1-8

    • DOI

      10.1002/pip.3215

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] High Performance Amorphous Silicon Thin Film Solar Cells Prepared at 100 °C: Toward Flexible Building; Integrated Photovoltaics2019

    • Author(s)
      Dong Won Kang, Jun Ryu, and Makoto Konagai
    • Journal Title

      Electronic Materials Letters

      Volume: 06 Issue: 5 Pages: 623-629

    • DOI

      10.1007/s13391-019-00161-8

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Optical Substrate to Activate Bifacially Multi-junction Amorphous Silicon Solar Cells by One-sided Light Incidence2021

    • Author(s)
      Kimihiko Saito, Hiroshi Noge, Ryousuke Ishikawa, Makoto Konagai
    • Organizer
      31st International Photovoltaic Science and Engineering Conference (PVSEC-31)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 両面受光6接合アモルファスSi太陽電池の動作シミュレーションと構造最適化2021

    • Author(s)
      野毛 宏、小長井 誠、石川 亮佑
    • Organizer
      2021年第68回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report 2020 Annual Research Report
  • [Presentation] ドープ層の微結晶化による6接合アモルファスSi太陽電池の特性改善2021

    • Author(s)
      野毛 宏、浅野 祐希、小長井 誠、石川 亮佑
    • Organizer
      2021年第82回応用物理学会秋季講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] ZEBへの応用を目指した各種太陽電池の屋外年間発電特性2021

    • Author(s)
      小長井 誠,野毛 宏,田中 敦,石川 亮佑
    • Organizer
      第18回次世代の太陽光発電システムシンポジウムム (第1回日本太陽光発電学会学術講演会)
    • Related Report
      2021 Annual Research Report
  • [Presentation] IoTデバイス向けアモルファスシリコン多接合太陽電池2021

    • Author(s)
      野毛 宏、小長井 誠
    • Organizer
      応用物理学会、応用電子物性分科会研究例会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Flexible Bifacial Amorphous Si Quintuple- and Sextuple-Junction Solar Cells for IoT Devices2020

    • Author(s)
      Makoto Konagai, Hiroshi Noge and Ryousuke Ishikawa
    • Organizer
      37th EU PVSEC 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Optical Design of Bifacially Light Receiving by One-sided Light Incidence for Multi-junction Amorphous Silicon Solar Cells2020

    • Author(s)
      Kimihiko Saito and Makoto Konagai
    • Organizer
      PVSEC-30 & GPVC 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bifacial sextuple-junction amorphous SiLICON solar cells on GLASS and polyimide and the optimazation of their i-layer thicknesses by optical simulation2020

    • Author(s)
      Hiroshi NOGE, Makoto KONAGAI, and Ryousuke ISHIKAWA
    • Organizer
      PVSEC-30 & GPVC 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ポリイミド上6接合アモルファスSi太陽電池の作製と低照度特性の改善2020

    • Author(s)
      野毛 宏、小長井 誠、石川 亮佑
    • Organizer
      2020年第81回応用物理学会秋季学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 5接合アモルファスシリコン太陽電池のフレキシブル化2020

    • Author(s)
      米村 百可、石川 亮佑、小長井 誠
    • Organizer
      第17回次世代の太陽光発電システムシンポジウム
    • Related Report
      2020 Annual Research Report
  • [Presentation] 5接合アモルファスシリコン太陽電池の片面光入射両面受光光学設計2020

    • Author(s)
      斉藤 公彦、小長井 誠
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 平坦基板上に作製した6接合アモルファスSi太陽電池の低照度特性2020

    • Author(s)
      小長井 誠、佐々木 崚、野毛 宏、石川 亮佑
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Bifacial Amorphous Si Quintuple-Junction Solar Cells for IoT Devices with High Open-Circuit Voltage of 3.5V under Low Illuminance2019

    • Author(s)
      Makoto Konagai; Ryo Sasaki
    • Organizer
      36th European Photovoltaic Solar Energy Conference and Exhibition
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Amorphous Si Quintuple-Junction Solar Cells on Graphene Layer for IoT Applications2019

    • Author(s)
      Ryousuke Ishikawa; Momoka Yonemura; Ryo Sasaki; Makoto Konagai
    • Organizer
      29th International Photovoltaic Science and Engineering Conf. (PVSEC-29)
    • Related Report
      2019 Annual Research Report
  • [Presentation] 5接合アモルファスSi太陽電池の低照度下での発電特性2019

    • Author(s)
      佐々木 崚; 米村 百可; 石川 亮佑; 小長井 誠
    • Organizer
      第16回 「次世代の太陽光発電システム」シンポジウム
    • Related Report
      2019 Annual Research Report
  • [Presentation] 5接合アモルファスSi太陽電池の低照度下での特性改善2019

    • Author(s)
      小長井 誠; 佐々木 崚; 米村 百可; 石川 亮佑
    • Organizer
      2019年 第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Remarks] 小長井・石川研究室ホームページ、「IoT応用に向けた高電圧アモルファスSi多接合太陽電池開発」

    • URL

      http://www.konagai-labo.org/research.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] 小長井・石川研究室「IoT応用に向けた高電圧アモルファスSi多接合太陽電池開発」

    • URL

      http://www.konagai-labo.org/research.html

    • Related Report
      2020 Annual Research Report
  • [Remarks] 小長井・石川研究室

    • URL

      http://www.konagai-labo.org/

    • Related Report
      2019 Annual Research Report

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Published: 2019-04-18   Modified: 2023-01-30  

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