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Photovoltaic Effects of Low-Dimensional Structures

Research Project

Project/Area Number 09044187
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionJoint Research
Research Field 電子デバイス・機器工学
Research InstitutionToyota Technological Institute

Principal Investigator

YAMAGUCHI Masafumi  Toyota Technological Institute, Professor, 大学院・工学研究科, 教授 (50268033)

Co-Investigator(Kenkyū-buntansha) BAMHAM Keith  Imperial College, Blancket Laboratory, Professor, Blancket Laboratory, Professor
YAMAMOTO Akio  Fukui University, Department of Engineering, Professor, 工学部, 教授 (90210517)
KEITH Barnha  Imperial College, Blackett Laboratory, Professor
Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥7,600,000 (Direct Cost: ¥7,600,000)
Fiscal Year 1998: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 1997: ¥4,100,000 (Direct Cost: ¥4,100,000)
KeywordsQuantum Well Structure / Solar Cell / Photovoltaic Effect / Gallium Arsenide / Indium Gallium Arsenide / Indium Gallium Phosphide / Gallium Nitride / Indium Nitride
Research Abstract

Low dimensional structures such as quantum wells (QWs) have potential of high-efficiency photovoltaic energy conversion with a conversion efficiency of more than 30%. The purposes of this project are to c1arify properties of various QW structure solar cells, those of tandem structures and those of them under concentrator condition, and realize high-efficiency.
Properties of GaAs/InGaAs QW structure solar cells under concentrator conditions have been studied. The efficiency is found to increase super-linearly with light intensity. At a ratio of 10-suns, 23% has been obtained. Analytical calculation suggests that minority-carrier lifetime increases with increase in light intensity because of saturation of minority-carrier trapping to the recombination center. Concentrator operation of InGaP/GaAs tandem solar cells has also been examined. High-efficiency of 31.2% has been realized under 5-suns of AM1.5 illumination.
Properties of GaAs/InGaAs, AlGaAs/GaAs and InGaP/GaAs QW structures grown by molecular beam epitaxy have been studied. Potential of InGaP/GaAs system for high-efficiency solar cell application and thermo-photovo1taic application are suggested. Properties of new materials such as InN and GaN grown by metal organic chemical vapor deposition have also been studied. GaN nano-column structure has successfully been fonned by nitridation. Photon recycling effect has been studied for InP solar cells with Bragg reflector. Conversion efficiency is found to increase by about 3% using photon-recycling effect as results of increase in photocurrent and open-circuit voltage.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] M.Yamaguchi et al.: "Toward 40% Super High-Efficiency Multi-Junction Solar Cells" Proceedings of 2nd World Conference of photovoltaic Energy Conversion. 3524-3529 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.-J.Yang et al.: "Investigation of Transferring High Efficiency In GaP_2/GaAs Tandem Solar Cells" Proceedings of 2nd World Conference on Photovoltaic Energy Conversion. 3590-3593 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N.J.Elkins-Paules et al.: "New Approaches in GaAs/AlGaAs Quantumn Well Solar Cells" Proceedings of 2nd World Conference on Photovoltaic Energy Conversion. 3626-3630 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.P.Connolly et al.: "Short Circuit Current Enhancement in GaAs/AlGaAs MQW Solar Cells" Proceedings of 2nd World Conference on Photovoltaic Energy Conversion. 3631-3634 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Hashimoto et al.: "Formation of GaN Nono-Column Structure by Nitridation" Materials Science Forum. 264-268. 1129-1132 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Yamamoto et al.: "A Comparative study on Photon Recycling Effects in In Solar Cells" Proceedings of the 26th IEEE Phtovoltaic Specialists Conference. 903-906 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Yamaguchi et al.: "Toward 40% Super High-Efficiency Multi-Junction Solar Cells" Proceedings of 2^<nd> World Conference on Photovoltaic Energy Conversion. 3524-3529 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.-J.Yang et al.: "Investigation of Transferring High Efficiency InGaP2/GaAs Tandem Solar Cells to Concentrator Applications" Proceedings of 2^<nd> World Conference on Photovoltaic Energy Conversion. 3590-3593 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] N.J.Elkins-Daukes et al.: "New Approaches in GaAs/InGaAs Quantum Well Solar Cells" Proceedings of 2^<nd> World Conference on Photovoltaic Energy Conversion. 3626-3630 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] J.P.Connolly et al.: "Short Circuit Current Enhancement in GaAs/AlGaAs MQW Solar Cells" Proceedings of 2^<nd> World Conference on Photovoltaic Energy Conversion. 3631-3634 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Hashimoto et al.: "Formation of GaN Nano-Column Structure by Nitridation" Materials Science Forum. 1129-1132 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] A.Yamamoto et al.: "A Comparative Study on Photon Recycling Effects in N+-P and P+-N InP Solar Cells with Bragg Reflector" Proceedings of 26^<th> IEEE Photovoltaic Specialists Conference. 903-906 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Yamaguchi et al.: "Toward 40% Super High-Efficiency Malti-Junction Solar Cells" Proc.of the 2nd World Conf.on PV Energy Conversion. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 山口 真史: "火星探査ロボットの太陽電池" 応用物理. 67・11. 1311-1314 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] M.-J.Yang et al.: "Investigation of High-Efficiency In GaP/GaAs Tandem Solar Cells" Jpn.J.Appl.Phys.37・7B. L836-L838 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] N.J.Elkins-Daukes et al.: "New Approaches in GaAs/InGaAs Quantum Well Solar Cells" Proc.of the 2nd World Conf.on PV Energy Conversion. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] J.P.Connolly et al.: "Short Circuit Current Enhancement in GaAs/AlGaAs MQW Solar Cells" Proc.of the 2nd World Conf.on PV Energy Conversion. (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] A.Hashimoto et al.: "Formation of GaN Nano-Column Structure by Nitridation" Materials Science Forum. 264-268. 1129-1132 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] P.R.Griffin et al.: "A Method for Optimising Stained GaAs/InGaAs Quantum Well Solar Cells" Proceedings of 14th European Photovoltaic Solar Energy Conf.1732-1735 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] M-J.Yang et al.: "Properties of GaAs/InGaAs Quantum Well Solar Cells under Low Concentration" Proceedings of 26th IEEE photovoltaic Specialists Conf.(印刷中). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] M.Yamaguchi et al.: "Toward 40% Super High-Efficiency Multi-Junction Solar Cells" Proceedings of 2nd World Conf.on photovoltaic Energy. (発表予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] M-J.Yang et al.: "Investigation of Transferring High Efficiency InGaP/GaAs Tandem Solar Cells" Proceedings of 2nd World Conf.on photovoltaic Energy. (発表予定). (1998)

    • Related Report
      1997 Annual Research Report
  • [Publications] 楊 民挙 他: "低集光領域でのGaAs/InGaAs多重量子井戸太陽電池の特性と解析" 第6回高効率太陽電池ワークショップ予稿集. 140-143 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] A.Yamamoto et al.: "Acomparative study on photan recycling effectis in Inpsolar cells" Proceedings of 26th IEEE photovoltaic Specialists Conf.(印刷中). (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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