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原子配列操作によるカルコパイライト型リン化物の物性制御および太陽電池への応用

Research Project

Project/Area Number 16J09443
Research Category

Grant-in-Aid for JSPS Fellows

Allocation TypeSingle-year Grants
Section国内
Research Field Structural/Functional materials
Research InstitutionKyoto University

Principal Investigator

中塚 滋  京都大学, 工学研究科, 特別研究員(PD)

Project Period (FY) 2016-04-22 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,200,000 (Direct Cost: ¥1,200,000)
Keywords太陽電池 / カルコパイライト型化合物 / リン化物 / 化合物半導体 / 規則-不規則変態
Outline of Annual Research Achievements

安価で豊富な元素から構成されるp 型化合物半導体ZnSnP2 は1.66 eV の直接遷移型バンドギャップを有し, 光吸収係数が可視光領域で105 cm-1 程度と高いことから, 安価で高効率な薄膜太陽電池材料として期待される. しかし, ZnSnP2 を太陽電池材料として利用した報告例はこれまでにない. 本研究では, 高効率太陽電池の実現を目
指し, ZnSnP2 バルク結晶を用いた太陽電池作製とその高効率化に取り組んだ. 以下にその実施状況を示す.
すでに実用化されているCIGS 太陽電池のセル構造を元に, Al/AZO/ZnO/CdS/ZnSnP2/Cuのセル構造を用いることで変換効率2%を記録した. しかし, 上記のセル構造においてCdS/ZnSnP2には大きなバンドオフセットが存在することをXPS測定から明らかにしており, CdS とZnS の固溶体(Cd,Zn)S を用いることでバンドオフセットの改善を図った. その結果, 太陽電池の性能を表すパラメータ短絡電流密度 12.3 mA/cm^2J, 開放電圧 0.472 V,曲線因子 0.594, 変換効率3.44 %が得られ, これまでの最高変換効率を記録することができた. 上記の研究成果は, 今後の変換効率向上の指針を示すものである.
さらに変換効率の向上を図るため結晶構造が近くバンドオフセットも小さいと予想されるCdSnP2/ZnSnP2 を用いたpn 接合形成を試みた.ZnSnP2結晶上にCd-Sn薄膜を形成し, これをリン化することでCdSnP2/ZnSnP2 接合の形成が確認された. さらに, CdSnP2 がZnSnP2 結晶上にエピタキシャル成長していることが明らかとなり, 良好な接合形成が示唆された. また, 電気的特性評価からはダイオード特性が確認され, 今後太陽電池への応用が期待される.

Research Progress Status

29年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

29年度が最終年度であるため、記入しない。

Report

(2 results)
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (16 results)

All 2018 2017 2016

All Journal Article (8 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 8 results,  Acknowledgement Compliant: 5 results) Presentation (8 results) (of which Int'l Joint Research: 6 results)

  • [Journal Article] ZnSnP 2 solar cell with (Cd,Zn)S buffer layer: Analysis of recombination rates2018

    • Author(s)
      Akari Shunsuke、Chantana Jakapan、Nakatsuka Shigeru、Nose Yoshitaro、Minemoto Takashi
    • Journal Title

      Sol. Energy Mater. Solar Cells

      Volume: 174 Pages: 412-417

    • DOI

      10.1016/j.solmat.2017.09.035

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Fabrication of CdSnP2 thin films by phosphidation for photovoltaic application2018

    • Author(s)
      Nakatsuka Shigeru, Ryosuke Inou, Yoshitaro Nose
    • Journal Title

      ACS Appl. Energy Mater.

      Volume: accepted Issue: 4 Pages: 1635-1640

    • DOI

      10.1021/acsaem.8b00079

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impact of Heterointerfaces in Solar Cells Using ZnSnP2 Bulk Crystals2017

    • Author(s)
      Nakatsuka Shigeru、Akari Shunsuke、Chantana Jakapan、Minemoto Takashi、Nose Yoshitaro
    • Journal Title

      ACS Appl. Mater. Interfaces

      Volume: 9 Issue: 39 Pages: 33827-33832

    • DOI

      10.1021/acsami.7b08852

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Photoelectrochemical Water Reduction over Ag-Alloyed Wide Gap Cu(In,Ga)S2 Thin Film Photocathodes2017

    • Author(s)
      W. Septina, M. Sugimoto, D. Chao, Q. Shen, S. Nakatsuka, Y. Nose, T. Harada, *S. Ikeda
    • Journal Title

      Physical Chemistry Chemical Physics

      Volume: 19 Issue: 19 Pages: 12502-12508

    • DOI

      10.1039/c7cp01348e

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Solar cells using bulk crystals of rare metal-free compound semiconductor ZnSnP22017

    • Author(s)
      S. Nakatsuka, N. Yuzawa, J. Chantana, T. Minemoto, and Y. Nose
    • Journal Title

      Physica Status Solidi A

      Volume: 214 Issue: 2 Pages: 1-4

    • DOI

      10.1002/pssa.201600650

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Order-Disorder Phenomena and Their Effects on Bandgap in ZnSnP22017

    • Author(s)
      S. Nakatsuka and Y. Nose
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 121 Issue: 2 Pages: 1040-1046

    • DOI

      10.1021/acs.jpcc.6b11215

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] ZnSnP2 thin-film solar cell prepared by phosphidation method under optimized Zn/Sn atomic ratio of its absorbing layer2017

    • Author(s)
      N. Yuzawa, J. Chantana, S. Nakatsuka, and Y. Nose
    • Journal Title

      Current Applied Physics

      Volume: 17 Issue: 4 Pages: 557-564

    • DOI

      10.1016/j.cap.2017.02.005

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Band offset at the heterojunction interfaces of CdS/ZnSnP2, ZnS/ZnSnP2, and In2S3/ZnSnP22016

    • Author(s)
      S. Nakatsuka, Y. Nose, and Y. Shirai
    • Journal Title

      Journal of Applied Physics

      Volume: 119 Issue: 19 Pages: 1-6

    • DOI

      10.1063/1.4950882

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Presentation] Influence of hetero-interfaces on photovoltaic performance in solar cells based on ZnSnP2 bulk crystal2017

    • Author(s)
      中塚滋
    • Organizer
      IEEE PVSC-44
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Device characterization of heterojunction solar cells using rare-metal-free compound ZnSnP22017

    • Author(s)
      中塚滋
    • Organizer
      EU PVSEC2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of CdSnP2/ZnSnP2 p-n junction2017

    • Author(s)
      中塚滋
    • Organizer
      PVSEC27
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ZnSnP2太陽電池における界面構造の最適化2016

    • Author(s)
      中塚滋
    • Organizer
      第1回フロンティア太陽電池セミナー
    • Place of Presentation
      京大化研
    • Year and Date
      2016-11-18
    • Related Report
      2016 Annual Research Report
  • [Presentation] Photovoltaic performance of ZnSnP2 bulk crystals with the efficiency over 1 %2016

    • Author(s)
      S. Nakatsuka
    • Organizer
      PVSEC26
    • Place of Presentation
      Singapore
    • Year and Date
      2016-10-22
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ZnSnP2バルク太陽電池の光電特性に裏面電極材料が与える影響2016

    • Author(s)
      中塚滋
    • Organizer
      第77回応用物理学会秋季学術講演会
    • Place of Presentation
      新潟、朱鷺メッセ
    • Year and Date
      2016-09-14
    • Related Report
      2016 Annual Research Report
  • [Presentation] Fabrication of solar cells based on ZnSnP2 bulk crystals2016

    • Author(s)
      S. Nakatsuka
    • Organizer
      ICTMC20
    • Place of Presentation
      Halle, Germany
    • Year and Date
      2016-09-06
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Bandgap tuning of ZnSnP2 through the order-disorder transition2016

    • Author(s)
      S. Nakatsuka
    • Organizer
      PRICM9
    • Place of Presentation
      Kyoto, Japan
    • Year and Date
      2016-08-02
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research

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Published: 2016-05-17   Modified: 2024-03-26  

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