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Analysis and control of defects in wide-gap thin-film photovoltaic devices

Research Project

Project/Area Number 19K05282
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 29020:Thin film/surface and interfacial physical properties-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Ishizuka Shogo  国立研究開発法人産業技術総合研究所, エネルギー・環境領域, 研究グループ長 (60415643)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
Keywords化合物薄膜 / 太陽電池 / エネルギー変換 / 薄膜 / 半導体 / ワイドギャップ / カルコゲナイド / カルコパイライト / CIS系太陽電池 / ワイドギャップカルコゲナイド / CIGS・CGS / エネルギー変換素子 / 欠陥物性・制御
Outline of Research at the Start

結晶欠陥や界面欠陥による性能律速が実用化を阻んでいるワイドギャップ(ここでは禁制帯幅1.6-2.0 eV)カルコゲナイド薄膜デバイスにおいて、欠陥の解析と制御技術の確立を目指す。技術が確立されることで、民生普及が可能な安価で高性能、長期信頼性に優れる太陽電池や水分解水素生成装置の実現が期待できる。代表的なワイドギャップカルコゲナイド材料の一つである禁制帯幅1.7 eVのCuGaSe2に着目し、薄膜粒内や界面の欠陥制御を行う。材料物性の評価だけでなく、光電変換デバイスを作製し光応答特性の評価も行う。多元系カルコゲナイドの欠陥解析と制御技術を学術的知見として体系化し、実用デバイスへの展開を目指す。

Outline of Final Research Achievements

For conventional photovoltaic solar cells, R&D on a single junction, based on crystalline Si, which can absorb the sunlight in a relatively wide wavelength range, have been dominant for practical applications. For these years, however, multi-junction solar cell technologies are expected to demonstrate high photovoltaic efficiencies beyond the SQ limit, and are attracting attention. To realize highly efficient and cost-effective multi-junction solar cells, R&D of low-cost and high-efficiency top cell materials which have a wider band-gap energy (Eg) than that of conventional Si (Eg~1.1 eV) is necessary. This subject focuses on chalcopyrite CuGaSe2 (Eg~1.7 eV) as a promising top cell material for practical applications for this purpose. The control of material properties of thin-films and improvement of solar energy conversion device performance are investigated.

Academic Significance and Societal Importance of the Research Achievements

Cu(In,Ga)Se2(CIGS)太陽電池に代表されるカルコパイライト系化合物薄膜太陽電池においては、その組成比等の制御により禁制帯幅を広範囲で制御が可能である。しかし理論予測に反し、禁制帯幅の増加に伴い開放電圧の伸びの鈍化や曲線因子の低下が見られ、広禁制帯幅CIGS系材料の高品質化は長年の課題であった。本研究では、広禁制帯幅CIGS系材料の一つである三元系CuGaSe2に着目し、その欠陥制御とデバイス高性能化に取り組んだ。結果、第三者機関測定値としてCuGaSe2太陽電池の世界最高効率を実現し、広禁制帯幅CIGS系材料が有望なタンデム型太陽電池材料と成り得ることを実証した。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (18 results)

All 2022 2021 2020 2019 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (11 results) (of which Int'l Joint Research: 7 results,  Invited: 6 results) Remarks (1 results)

  • [Journal Article] Physical and chemical aspects at the interface and in the bulk of CuInSe2-based thin-film photovoltaics2022

    • Author(s)
      Ishizuka Shogo、Nishinaga Jiro、Beppu Kosuke、Maeda Tsuyoshi、Aoyagi Fuuka、Wada Takahiro、Yamada Akira、Chantana Jakapan、Nishimura Takahito、Minemoto Takashi、Islam Muhammad Monirul、Sakurai Takeaki、Terada Norio
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 24 Issue: 3 Pages: 1262-1285

    • DOI

      10.1039/d1cp04495h

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Role of the Cu-Deficient Interface in Cu(In, Ga)Se2 Thin-Film Photovoltaics with Alkali-Metal Doping2021

    • Author(s)
      Ishizuka Shogo、Fons Paul J.
    • Journal Title

      Physical Review Applied

      Volume: 15 Issue: 5

    • DOI

      10.1103/physrevapplied.15.054005

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impact of Cu-deficient p-n heterointerface in CuGaSe2 photovoltaic devices2021

    • Author(s)
      Ishizuka Shogo
    • Journal Title

      Applied Physics Letters

      Volume: 118 Issue: 13

    • DOI

      10.1063/5.0047062

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Lithium-Doping Effects in Cu(In,Ga)Se2 Thin-Film and Photovoltaic Properties2020

    • Author(s)
      S. Ishizuka, P. J. Fons
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 12 Issue: 22 Pages: 25058-25065

    • DOI

      10.1021/acsami.0c06284

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A comparative study of the effects of light and heavy alkali-halide postdeposition treatment on CuGaSe2 and Cu(In,Ga)Se2 thin-film solar cells2020

    • Author(s)
      S. Ishizuka, N. Taguchi, J. Nishinaga, Y. Kamikawa, H. Shibata
    • Journal Title

      Solar Energy

      Volume: 211 Pages: 1092-1101

    • DOI

      10.1016/j.solener.2020.10.048

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Polycrystalline CuGaSe2 thin film growth and photovoltaic devices fabricated on alkali-free and alkali-containing substrates2020

    • Author(s)
      Ishizuka Shogo、Fons Paul J.
    • Journal Title

      Journal of Crystal Growth

      Volume: 532 Pages: 125407-125407

    • DOI

      10.1016/j.jcrysgro.2019.125407

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] カルコパイライト系太陽電池の動向2022

    • Author(s)
      石塚尚吾
    • Organizer
      第69回応用物理学会春季学術講演会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] Efficiency Enhancement in Lightweight and Flexible CIGS Solar Minimodules2021

    • Author(s)
      S. Ishizuka, Y. Kamikawa, J. Nishinaga, T. Masuda
    • Organizer
      2021 International Conference on Solid State Devices and Materials (SSDM2021)
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CIS系太陽電池のアルカリ金属添加制御と軽量ミニモジュールへの応用2021

    • Author(s)
      石塚尚吾, 上川由紀子, 西永慈郎, 増田泰造
    • Organizer
      日本太陽光発電学会 第18回「次世代の太陽光発電システム」シンポジウム (第1回日本太陽光発電学会学術講演会)
    • Related Report
      2021 Annual Research Report
  • [Presentation] CIS系太陽電池の現在とこれからの研究開発課題2021

    • Author(s)
      石塚尚吾、 西永慈郎、 別府孝介、 前田毅、 青柳風香、 和田隆博、 山田明、 J. Chantana、 西村昂人、 峯元高志、 M. M Islam、 櫻井丘暁、 寺田教男
    • Organizer
      応用物理学会 多元系化合物・太陽電池研究会 2021年度年末講演会
    • Related Report
      2021 Annual Research Report
    • Invited
  • [Presentation] A Comparative Study of the Effects of Light and Heavy Alkali-Halide Postdeposition Treatment on CuGaSe2 and Cu(In,Ga)Se2 Thin-Film Solar Cells2020

    • Author(s)
      S. Ishizuka, N. Taguchi, J. Nishinaga, Y. Kamikawa, H. Shibata
    • Organizer
      Solid State Devices and Materials (SSDM) 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Alkali-metal doping effects on CIGS thin film solar cells: A systematic study from lithium to cesium2020

    • Author(s)
      Shogo Ishizuka
    • Organizer
      PVSEC-30
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Prospects for CIS solar cell research in Japan2020

    • Author(s)
      Shogo Ishizuka
    • Organizer
      International conference on advanced light absorbing materials for next generation photovoltaices (ABSOGEN)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Polycrystalline CuGaSe2 Thin-Film Growth on Sapphire or Zirconia Substrates with Alkali-Metal Doping2019

    • Author(s)
      Shogo Ishizuka, Paul. J. Fons
    • Organizer
      ICCGE-19
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Recent CIGS Photovoltaic Research Activity at AIST2019

    • Author(s)
      S. Ishizuka, J. Nishinaga, Y. Kamikawa, S. Kim, T. Koida, H. Shibata & N. Taguchi
    • Organizer
      2019 EUPVSEC
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] Effects of alkali-metals in CIGS and related multinary compounds2019

    • Author(s)
      Shogo Ishizuka
    • Organizer
      International Workshop on Ternary and Multinary Compounds 2019
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 銅系化合物薄膜のアルカリ金属効果2019

    • Author(s)
      石塚 尚吾、田口昇、金信浩、西永慈郎、上川由紀子
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Research-status Report
  • [Remarks] 高効率な軽量フレキシブルCIS系太陽電池ミニモジュールを開発

    • URL

      https://www.aist.go.jp/aist_j/press_release/pr2021/pr20210531/pr20210531.html

    • Related Report
      2021 Annual Research Report

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

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