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Development of a Soft Process for CdTe Solar Cell using Photo-assisted Electrodeposition

Research Project

Project/Area Number 14350399
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Metal making engineering
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

HIRATO Tetsuji  KYOTO UNIVERSITY, Dept.Materials Science & Engineering, Associate Professor, 工学研究科, 助教授 (70208833)

Co-Investigator(Kenkyū-buntansha) AWAKURA Yasuhiro  KYOTO UNIVERSITY, Dept.Materials Science & Engineering, Professor, 工学研究科, 教授 (70109015)
MATSUBARA Eiichiro  TOHOKU UNIVERSITY, Institute for Materials Research, Professor, 金属材料研究所, 教授 (90173864)
MURASE Kuniaki  KYOTO UNIVERSITY, Dept.Materials Science & Engineering, Associate Professor, 工学研究科, 助教授 (30283633)
SAGA Tatsuo  SARP COOP, SOLAR SYSTEM DIVISION, DIRECTOR, ソーラーシステム事業部・第一事業部, 部長
Project Period (FY) 2002 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥15,500,000 (Direct Cost: ¥15,500,000)
Fiscal Year 2004: ¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2003: ¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥8,400,000 (Direct Cost: ¥8,400,000)
KeywordsCadmium Telluride / Cadmium Sulfide / Compound Semiconductor / Solar Cell / Electrodeposition / Chemical Bath Deposition / Transparent Electroconductive Substrate / Transmission Electron Microscope / 透明電導性基板
Research Abstract

To develop a new soft process for CdTe thin layer solar cell, photo-assisted electrodeposition of CdTe from ammoniacal basic electrolytes was investigated. The electrical properties of polycrystalline CdTe layers electrodeposited were examined by resistivity and Hall effect measurement, As-deposited CdTe layers were found to be p-type with resistivity of 10^7-10^9Ω cm, carrier density of 10^9-10^<11> cm^<-3>, and mobility ca. 1 cm^2 V^<-1> s^<-1>. This high resistivity of CdTe layer from basic baths probably leads to low-efficiency solar cells. The microstructures of CdTe layers electrodeposited from basic electrolytes were investigated by transmission electron microscopy and compared with those from a conventional acidic sulfate electrolyte. As^- deposited CdTe layers from a basic electrolyte were composed of randomly oriented crystallites with a grain size of ca.10 nm, while those from an acidic electrolyte consisted of defective columnar grains with a <111> preferred growth orientation. Each of the columnar has a diameter of of ca.150 nm. The small grain size of the polycrystalline CdTe deposits from the basic electrolyte suggests that nucleation of new grains occurs frequently during electrodeposition. By annealing at 573 K for 1 h in an Ar atmosphere, CdTe grains from the basic electrolyte grew by about a factor of four, but at the same time, nano-voids were formed at the grain boundaries. In contrast, CdTe grains from the acidic electrolyte did not grow by annealing the same conditions. Since a large grain size is desirable for CdTe layers to be used in high-efficiency solar cells, it is important to control the nucleation of new grains during electrodeposition and the grain growth of CdTe deposits by annealing.

Report

(4 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • 2002 Annual Research Report
  • Research Products

    (40 results)

All 2005 2004 2003 2002 Other

All Journal Article (29 results) Publications (11 results)

  • [Journal Article] Galvanic Contact Deposition of CdTe Layers using Ammoniacal Basic Aqueous Solution2005

    • Author(s)
      K.Arai, S.Hagiwara, K.Murase, T.Hirato, Y.Awakura
    • Journal Title

      Journal of the Electrochemical Society 152(4)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrochemical QCM Studies of CdTe Formation and Dissolution in Ammoniacal Basic Aqueous Electrolytes2005

    • Author(s)
      K.Murase, Y.Tanaka, T.Hirato, Y.Awakura
    • Journal Title

      Journal of the Electrochemical Society 152(5)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Galvanic contact Deposition of CdTe Layers using Ammoniacal Basic Aqueous Solution2005

    • Author(s)
      K.Arai
    • Journal Title

      Journal of the Electrochemical Society 152(4)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Electrochemical QCM Studies of CdTe Formation and Dissolution in Ammoniacal Basic Aqueous Electrolytes2005

    • Author(s)
      K.Murase
    • Journal Title

      Journal of the Electrochemical Society 152(5)(印刷中)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Comparison of Microstructures of CdTe Layers Electrodeposited from Basic Ammoniacal and Acidic Sulfate Electrolytes2004

    • Author(s)
      M.Miyake, K.Murase, H.Inui, T.Hirato, Y.Awakura
    • Journal Title

      Journal of the Electrochemical Society 151(3)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Hall Effect Measurements on CdTe Layers Electrodeposited from Acidic Aqueous Electrolyte2004

    • Author(s)
      M.Miyake, K.Murase, T.Hirato, Y.Awakura
    • Journal Title

      Journal of Electroanalytical Chemistry 562

      Pages: 247-253

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 酸性クエン酸水溶液からのCdTe薄膜電析2004

    • Author(s)
      邑瀬邦明, 小田 暢, 平藤哲司, 粟倉泰弘
    • Journal Title

      表面技術 55(5)

      Pages: 360-365

    • NAID

      10012931608

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Analytical Transmission Electron Microscopy Study of CdTe Layer Electrodeposited from Basic Ammoniacal Aqueous Electrolyte2004

    • Author(s)
      M.Miyake, K.Murase, H.Inui, T.Hirato, Y.Awakura
    • Journal Title

      Journal of the Electrochemical Society 151(11)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrodeposition of CdTe Semiconductor Layers from Basic Ammoniacal Aqueous Solutions - Thermodynamics, Morphology, and Electrical Properties2004

    • Author(s)
      Y.Awakura, K.Murase, T.Hirato
    • Journal Title

      High Temperature Materials and Processes 23(5-6)

      Pages: 383-398

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 電位-pH図を使って半導体電析を解釈する〜CdTe電析を例に〜2004

    • Author(s)
      邑瀬邦明, 粟倉泰弘
    • Journal Title

      表面技術 55(12)

      Pages: 903-906

    • NAID

      10014096715

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrodeposition of CdTe from Acidic Aqueous Solutions Containing Citric Acid2004

    • Author(s)
      K.Murase, T.Oda, T.Hlrato, Y.Awakura
    • Journal Title

      Journal of the Surface Finishing society of Japan 55(5)

      Pages: 360-365

    • NAID

      10012931608

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrodeposition of CdTe Semiconductor Layers from Basic Ammoniacal Aqueous Solutions-Thermodynamics, Morphology, and Electrical Properties2004

    • Author(s)
      Y.Awakura, K.Murase, T.Hirato
    • Journal Title

      High Temperature Materials and Processes 23(5-6)

      Pages: 383-398

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Interpretation of Semiconductor Electrodeposition Using Potential-pH Diagrams : The Case of CdTe2004

    • Author(s)
      K.Murase, Y.Awakura
    • Journal Title

      Journal of the Surface Finishing society of Japan 55(12)

      Pages: 360-365

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrodeposition of CdTe Semiconductor Layers from Basic Ammoniacal Aqueous Solutions - Thermodynamics, Morphology, and Electrical Properties2004

    • Author(s)
      Y.Awakura
    • Journal Title

      High Temperature Materials and Processes 23(5-6)

      Pages: 383-398

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Analytical Transmission Electron Microscopy Study of CdTe Layer Electrodeposited from Basic Ammoniacal Aqueous Electrolyte2004

    • Author(s)
      M.Miyake
    • Journal Title

      Journal of the Electrochemical Society 151(11)

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 酸性クエン酸水溶液からのCdTe薄膜電析2004

    • Author(s)
      邑瀬邦明
    • Journal Title

      表面技術 55(5)

      Pages: 360-365

    • NAID

      10012931608

    • Related Report
      2004 Annual Research Report
  • [Journal Article] 電位-pH図を使って半導体電析を解釈する〜CdTe電析を例に〜2004

    • Author(s)
      邑瀬邦明
    • Journal Title

      表面技術 55(12)

      Pages: 903-906

    • NAID

      10014096715

    • Related Report
      2004 Annual Research Report
  • [Journal Article] Effect of Anions on Electrodeposition of CdTe from Ammonia-alkaline Solution2003

    • Author(s)
      M.Miyake, K.Murase, T.Hirato, Y.Awakura
    • Journal Title

      Surface and Coatings Technology 169/170

      Pages: 108-111

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Photo-assisted Electrodeposition of CdTe Layer from Ammoniacal Basic Aqueous Solutions2003

    • Author(s)
      K.Murase, M.Matsui, M.Miyake, T.Hirato, Y.Awakura
    • Journal Title

      Journal of the Electrochemical Society 150(1)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrodeposition of Thin-Layered CdTe Semiconductor from Basic Aqueous Solutions2003

    • Author(s)
      K.Murase, T.Hirato, Y.Awakura
    • Journal Title

      Metallurgical and Materials Processing Principles and Technologies (Yazawa International Symposium), Vol.3 : Aqueous and Electrochemical Processing

      Pages: 51-64

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrical Properties of CdTe Layers Electrodeposited from Ammoniacal Basic Electrolytes2003

    • Author(s)
      M.Miyake, K.Murase, T.Hirato, Y.Awakura
    • Journal Title

      Journal of the Electrochemical Society 150(6)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 湿式法による太陽電池用CdTe薄膜材料の作製2003

    • Author(s)
      粟倉泰弘, 邑瀬邦明
    • Journal Title

      表面技術 54(12)

      Pages: 984-987

    • NAID

      10011819330

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] 酸性および塩基性水溶液からの電析CdTe半導体薄膜の微細組織2003

    • Author(s)
      三宅正男, 乾 晴行, 邑瀬邦明, 平藤哲司, 粟倉泰弘
    • Journal Title

      まてりあ 42(12)

      Pages: 907-907

    • NAID

      10011817362

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Effect of Anions on Electrodeposition of CdTe from Ammonia-alkaline Solutions2003

    • Author(s)
      M.Miyake, K.Murase, T.Hirato, Y.Awakura
    • Journal Title

      Surface and Coatings Technology 169/170

      Pages: 108-111

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrodeposition of Thin-Layered CdTe Semiconductor from Basic Aqueous Solutions2003

    • Author(s)
      K.Murase, T.Hirato, Y.Awakura
    • Journal Title

      Metallurgical and Materials Processing Principles and Technologies (Yazawa International Symposium)(Aqueous and Electrochemical Processing) Vol.3

      Pages: 51-64

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Preparation of CdTe Films for Solar Cell by Wet Processes2003

    • Author(s)
      Y.Awakura, K.Murase
    • Journal Title

      Journal of the Surface Finishing society of Japan 54(12)

      Pages: 984-987

    • NAID

      10011819330

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Microstructure of CdTe Semiconductor Layers Electrodeposite From Basic and Acidic Aqueous Solutions2003

    • Author(s)
      M.Miyake, H.Inui, K.Murase, T.Hirato, Y.Awakura
    • Journal Title

      Materia Japan 42(12)

      Pages: 907-907

    • NAID

      10011817362

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] ジエチレントリアミンを含む塩基性浴からのCdTe薄膜の電析2002

    • Author(s)
      邑瀬邦明, 本田 崇, 平藤哲司, 粟倉泰弘
    • Journal Title

      表面技術 53(8)

      Pages: 535-543

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Electrodeposition of CdTe from Basic Aqueous Solutions Containing Dirthylenetriamine2002

    • Author(s)
      K.Murase, T.Honda, T.Hirato, Y.Awakura
    • Journal Title

      Journal of the Surface Finishing society of Japan 53(8)

      Pages: 535-543

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] M.Miyake: "Electrical Properties of CdTe Layers Electrodeposited from Ammoniacal Basic Electrolytes"Journal of the Electrochemical Society. 150(6). C413-C419 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Miyake: "Effect of Anions on Electrodeposition of CdTe from Ammonia-alkaline Solutions"Surface and Coatings Technology. 169/170. 108-111 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Miyake: "Comparison of Microstructures of CdTe Layers Electrodeposited from Basic Ammoniacal and Acidic Sulfate Electrolytes"Journal of the Electrochemical Society. 151(3). C168-C175 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Miyake: "Hall Effect Measurements on CdTe Layers Electrodeposited from Acidic Aqueous Electrolyte"Journal of Electroanalytical Chemistry. 562. 247-253 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 三宅正男: "酸性および塩基性水溶液からの電析CdTe半導体薄膜の微細組織"まてりあ. 42(12). 907-907 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 粟倉泰弘: "湿式法による太陽電池用CdTe薄膜材料の作製"表面技術. 54(12). 984-987 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] M.Miyake: "Electrical Properties of CdTe Layers Electrodeposited from Ammoniacal Basic Electrolytes"Journal of the Electrochemical Society. 150(7)(印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Murase: "Photo-assisted Electrodeposition of CdTe Layer from Ammoniacal Basic Aqueous Solutions"Journal of the Electrochemical Society. 150(1). C44-C51 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Miyake: "Effect of Anions on Electrodeposition of CdTe from Ammonia-alkaline Solutions"Surface and Coatings Technology. (印刷中). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Murase: "Electrodeposition of Thin-Layered CdTe Semiconductor from Basic Aqueous Solutions"Metallurgical and Materials Processing Principles and Technologies (Yazawa International Symposium), Vol.3: Aqueous and Electrochemical Processing. 51-64 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 邑瀬邦明: "ジエチレントリアミンを含む塩基性浴からのCdTe薄膜の電析"表面技術. 150(8). 535-543 (2002)

    • Related Report
      2002 Annual Research Report

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Published: 2002-04-01   Modified: 2016-04-21  

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