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A study of the mechanism behind alkali-metal effects on compound semiconductor thin-film photovoltaics

Research Project

Project/Area Number 16K04969
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Thin film/Surface and interfacial physical properties
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, 研究チーム長 (60415643)

Research Collaborator Taguchi Noboru  産業技術総合研究所
Tanaka Shingo  産業技術総合研究所
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords太陽電池 / 半導体薄膜 / 光電変換素子 / エネルギー / 表面・界面 / 応用物理 / エネルギー変換素子 / アルカリ金属効果 / 欠陥物性・制御 / カルコゲナイド / 薄膜 / カルコパイライト / アルカリ金蔵 / Cu(In,Ga)Se2 / アルカリ金属 / アルカリ効果
Outline of Final Research Achievements

The mechanism behind so-called alkali-effects on CIGS photovoltaics has long been studied to date. In this research project, effects of alkali-metal Rb are particularly focused upon. It was found in this study that the presence of elemental In was important to obtain the alkali-beneficial effects so that In-free CuGaSe2 photovoltaic devices did not show significant improvements with Rb addition. It was also revealed that Rb addition to In-containing CIGS films using RbF postdeposition treatment (RbF-PDT) showed surface morphology modification with the formation of a RbInSe2 compound layer of about some nano-meter in thickness, whereas In-free CuGaSe2 films showed no such compound layer formation. These new findings published in journals such as J. Phys. Chem. C 2018, 122, 3809-3817 and Appl. Phys. Lett. 2018, 113, 063901 are expected to bring new insights into developments in CIGS photovoltaics.

Academic Significance and Societal Importance of the Research Achievements

Cu(In,Ga)Se2 (CIGS)に代表されるカルコパイライト化合物薄膜太陽電池におけるアルカリ金属効果のメカニズムに関連した多くの重要な知見を得ることができた。今後は得られた成果を応用して、更なる太陽電池デバイス性能向上に必要な技術開発への展開が期待できるとともに、軽く、曲げることも可能な軽量フレキシブルCIGS太陽電池の実用化など、スマートエネルギー社会において求められる太陽光発電の進化と多様な用途展開の実現が期待できる。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • Products Report
  • Research Products

    (16 results)

All 2019 2018 2017 2016

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 2 results) Patent(Industrial Property Rights) (3 results) (of which Overseas: 1 results)

  • [Journal Article] An over 18%-efficient completely buffer-free Cu(In,Ga)Se2 solar cell2018

    • Author(s)
      Shogo Ishizuka, Jiro Nishinaga, Takashi Koida and Hajime Shibata
    • Journal Title

      Applied Physics Express

      Volume: 11 Issue: 7 Pages: 0755021-4

    • DOI

      10.7567/apex.11.075502

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of RbF postdeposition treatment and heat-light soaking on the metastable acceptor activation of CuInSe2 thin film photovoltaic devices2018

    • Author(s)
      Shogo Ishizuka, Hajime Shibata, Jiro Nishinaga, Yukiko Kamikawa, and Paul J. Fons
    • Journal Title

      Applied Physics Letters

      Volume: 113 Issue: 6 Pages: 0639011-5

    • DOI

      10.1063/1.5031898

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Direct insights into RbInSe2 formation at Cu(In,Ga)Se2 thin film surface with RbF postdeposition treatment2018

    • Author(s)
      Noboru Taguchi, Shingo Tanaka, and Shogo Ishizuka
    • Journal Title

      Applied Physics Letters

      Volume: 113 Issue: 11 Pages: 1139031-4

    • DOI

      10.1063/1.5044244

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Si-Doped Cu(In,Ga)Se2 Photovoltaic Devices with Energy Conversion Efficiencies Exceeding 16.5% without a Buffer Layer2018

    • Author(s)
      Ishizuka Shogo、Nishinaga Jiro、Iioka Masayuki、Higuchi Hirofumi、Kamikawa Yukiko、Koida Takashi、Shibata Hajime、Fons Paul
    • Journal Title

      Advanced Energy Materials

      Volume: 8 Issue: 11 Pages: 1702391-1702391

    • DOI

      10.1002/aenm.201702391

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Group III Elemental Composition Dependence of RbF Postdeposition Treatment Effects on Cu(In,Ga)Se2 Thin Films and Solar Cells2018

    • Author(s)
      Ishizuka Shogo、Taguchi Noboru、Nishinaga Jiro、Kamikawa Yukiko、Tanaka Shingo、Shibata Hajime
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 122 Issue: 7 Pages: 3809-3817

    • DOI

      10.1021/acs.jpcc.8b00079

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Si-Doping Effects in Cu(In,Ga)Se2 Thin Films and Applications for Simplified Structure High-Efficiency Solar Cells2017

    • Author(s)
      Ishizuka Shogo、Koida Takashi、Taguchi Noboru、Tanaka Shingo、Fons Paul、Shibata Hajime
    • Journal Title

      ACS Applied Materials & Interfaces

      Volume: 9 Issue: 36 Pages: 31119-31128

    • DOI

      10.1021/acsami.7b09019

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] カルコパイライト太陽電池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 、永井武彦 、反保衆志 、柴田肇
    • Organizer
      2019年 第66回応用物理学会春季学術講演会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] Effects of RbF Post-Deposition Treatment on CuInSe2-based Thin Films and Solar Cells2018

    • Author(s)
      S. Ishizuka*, N. Taguchi, S. Tanaka, J. Nishinaga, Y. Kamikawa, P. Fons, and H. Shibata
    • Organizer
      E-MRS Spring Meeting 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CIGS太陽電池の表面と粒界のアルカリ金属効果2018

    • Author(s)
      石塚尚吾、田口昇、田中真悟
    • Organizer
      2018年 第79回応用物理学会秋季学術講演会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Cu(In,Ga)Se2薄膜へのSi添加効果と バッファフリー太陽電池への応用2017

    • Author(s)
      石塚尚吾、鯉田崇、西永慈郎、上川由紀子、田口昇、田中真悟、柴田肇
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] Challenges for high-efficiency buffer-free Cu(In,Ga)Se2 solar cells2017

    • Author(s)
      Shogo Ishizuka, Takashi Koida, Noboru Taguchi, Shingo Tanaka, Paul J. Fons, Hajime Shibata
    • Organizer
      33rd EU-PVSEC
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Effects of RbF-PDTs on Quaternary CIGS and Ternary CGS Thin Film Solar Cells2017

    • Author(s)
      S. Ishizuka, N. Taguchi, J. Nishinaga, Y. Kamikawa, S. Tanaka, and H. Shibata
    • Organizer
      PVSEC-27
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] CIGS太陽電池の表面・界面に残された課題2016

    • Author(s)
      石塚尚吾
    • Organizer
      平成28年度応用物理学会「多元系化合物・太陽電池研究会」年末講演会
    • Place of Presentation
      磐梯熱海ホテル華の湯
    • Year and Date
      2016-12-10
    • Related Report
      2016 Research-status Report
    • Invited
  • [Patent(Industrial Property Rights)] 太陽電池及びその製造方法2019

    • Inventor(s)
      石塚 尚吾
    • Industrial Property Rights Holder
      産業技術総合研究所
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2019-501293
    • Filing Date
      2019
    • Related Report
      Products Report
  • [Patent(Industrial Property Rights)] 太陽電池及びその製造方法2018

    • Inventor(s)
      石塚尚吾
    • Industrial Property Rights Holder
      石塚尚吾
    • Industrial Property Rights Type
      特許
    • Filing Date
      2018
    • Related Report
      2017 Research-status Report
    • Overseas
  • [Patent(Industrial Property Rights)] 太陽電池及びその製造方法2017

    • Inventor(s)
      石塚尚吾
    • Industrial Property Rights Holder
      石塚尚吾
    • Industrial Property Rights Type
      特許
    • Filing Date
      2017-02-27
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2021-07-06  

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