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Development of high conversion efficiency silicon solar cells with silicon nanowire surface

Research Project

Project/Area Number 18K03498
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 13020:Semiconductors, optical properties of condensed matter and atomic physics-related
Research InstitutionUniversity of Hyogo

Principal Investigator

Yoshida Haruhiko  兵庫県立大学, 工学研究科, 准教授 (90264837)

Co-Investigator(Kenkyū-buntansha) 森 英喜  兵庫県立大学, 工学研究科, 助教 (50364039)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2018: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywordsシリコン系太陽電池 / シリコンナノワイヤ / 表面反射率 / キャリアライフタイム / パッシベーション / 界面特性
Outline of Final Research Achievements

Si nanowires fabricated on Si substrates were applied as a method to suppress the optical reflection at the Si surface. Moreover, it has been expected that the solar cell with Si nanowire surface is able to utilize light of the shorter wavelength. However, a further study on the optical and electrical properties of the Si nanowires is necessary for the practical use.
In this study, the reflectance and the minority carrier lifetime of the Si nanowires with various lengths on Si substrates were characterized and optimized. Also, it has been proved that a gallium oxide is effective as a novel passivation film for Si solar cells.

Academic Significance and Societal Importance of the Research Achievements

結晶系シリコン太陽電池の更なる変換効率向上のためには、キャリア再結合(電気のもととなる電子の消失)及び入射光の反射の抑制が重要となる。さらに、次世代太陽電池としては結晶系シリコン太陽電池の変換効率の限界を超える新しい太陽電池の構造の開発が望まれている。
本課題で得られた光の反射率及びキャリア再結合のシリコンナノワイヤ長依存性や新しい太陽電池用のパッシベーション(保護)膜に関する知見は次世代太陽電池の開発に貢献できるものであると考えられる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (4 results)

All 2019

All Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] Optical and Electrical Properties of Si Nanowire for Si Solar Cells2019

    • Author(s)
      Masaya Kuriyama, Hidenobu Mori, and Haruhiko Yoshida
    • Organizer
      The 2019 IMFEDK, IEEE
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] ミストCVD法により成膜したGaOx膜のアニール効果(Ⅱ)2019

    • Author(s)
      松田 紘明、森 英喜、新船 幸二、吉田 晴彦
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] ミストCVD法により成膜したGaOx膜のアニール効果2019

    • Author(s)
      松田 紘明、森 英喜、新船 幸二、佐藤 真一、吉田 晴彦
    • Organizer
      第66回 応用物理学会 春季学術講演会
    • Related Report
      2018 Research-status Report
  • [Presentation] 高見建也、堀川 裕貴、森 英喜、吉田 晴彦2019

    • Author(s)
      SiNx/Si構造の電気特性におけるファイヤースルー処理の影響(Ⅲ)
    • Organizer
      第66回 応用物理学会 春季学術講演会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-01-27  

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