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2011 Fiscal Year Annual Research Report

高効率太陽電池用高品質基板材料の新規作成法

Research Project

Project/Area Number 22760005
Research InstitutionShizuoka University

Principal Investigator

ムカンナン アリバナンドハン  静岡大学, 電子工学研究所, 助教 (50451620)

Keywords太陽電池 / シリコン / シリコンゲルマニウム / ガリウム添加 / 少数キャリア寿命 / 格子間酸素濃度 / 欠陥密度 / 酸素析出物
Research Abstract

市販されているシリコン(Si)太陽電池の変換効率は約20%であり、変換効率のさらなる向上が求められている。太陽電池の変換効率を高くするためには、結晶欠陥発生を抑制することが必要である。本研究は、変換効率を向上させるために、偏析係数の大きなゲルマニム(Ge)に注目し、(1)Geの添加がSi結晶中のボイド欠陥形成および光照射による結晶品質劣化に及ぼす効果を明らかにすること及び(2)ガリウム(Ga)をドープしたシリコンゲルマニウム(Si_<1-x>Ge_x)結晶の偏析現象、欠陥発生機構及び寿命に対するGe組成の効果を明らかにすることを目的とした。Ge組成が異なるGaドープSi_xGe_<1-x>結晶(x=0,0.006,0.03,0.045,0.06)を回転引き上げ法で成長させ、欠陥密度と格子間酸素濃度に対するGe組成依存性を調べた。光照射前後のウエハーの寿命特性を微小光容量減衰法と表面光電圧法により測定した。結晶をSeccoエッチャントを用いてエッチングすることで成長欠陥に対応したエッチピットを形成し、エッチピット密度を測定した。その結果、(1)Gaドープ濃度を増加させると、少数キャリア寿命が増加すること、(2)光照射減衰実験により、BドープSi結晶の劣化が急速に起こることに対して、BとGeをドープSi結晶の劣化は低濃度添加の場合抑制されること、(3)Ge組成が高い程、欠陥密度と格子間酸素濃度が減少すること等が明らかとなった。これらの現象は、Ge-空孔の複合体が不均一核形成センターとして働くことで、酸素析出物を形成し、その結果として格子間酸素濃度が減少することを示している。

  • Research Products

    (16 results)

All 2012 2011 Other

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (11 results) Remarks (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Impact of Ge codoping on the enhancement of minority carrier lifetime in B-doped Czochralski -grown Si2012

    • Author(s)
      M.ARIVANANDHAN, R.GOTOH, T.WATAHIKI, K.FUJIWARA, Y.HAYAKAWA, S.UDA, M.KONAGAI
    • Journal Title

      J.Appl.Phys.

      Volume: 111 Pages: 043707

    • DOI

      10.1063/1.3687935

    • Peer Reviewed
  • [Journal Article] Growth of homogeneous polycrystalline Sil-xGex and Mg2Si1-xGex for therm oelectric application2011

    • Author(s)
      Y.HAYAKAWA, M.ARIVANANDHAN, Y.SAITO, T.KOYAMA, Y.MOMOSE, H.IKEDA, A.TANAKA, C.WEN, Y.KUBOTA, T.NAKAMURA, D.K.ASWAL, S.BHATTACHARY, S.MOORTHY BABU, Y.INATOMI, H.TATSUOKA
    • Journal Title

      Thin Solid Films

      Volume: 519 Pages: 8532-8537

    • DOI

      10.1016/j.tsf.2011.05.033

    • Peer Reviewed
  • [Journal Article] The Impact of Ge Codoping on Grown-in o precipitates in Ga-dopedCzochralski-silicon2011

    • Author(s)
      M.ARIVANANDHAN, R.GOTH, K.FUJIWARA, T.OZAWA, Y.HAYAKAWA, S.UDA
    • Journal Title

      J.Crystal Growth

      Volume: 321 Pages: 24-28

    • DOI

      10.1016/j.jcrysgro.2011.02.028

    • Peer Reviewed
  • [Presentation] In-situ observation of dissolution process of Si into Ge melt by X-ray penetration Method2012

    • Author(s)
      M.OMPRAKASH, M.ARIVANANDHAN, H.MORII, T.AOKI, T.KOYAMA, Y.MOMOSE, A.TANAKA, H.IKEDA, H.TATSUOKA, Y.OKANO, T.OZAWA, Y.INATOMI, S.MOORTHY BABU, Y.HAYAKAWA
    • Organizer
      59th Spring meeting of Japan Society of Applied Physics
    • Place of Presentation
      Waseda Univercity (Tokyo, Japan)
    • Year and Date
      2012-03-17
  • [Presentation] The effect of Ge codoping on the B-O pair formation in B-doped CZ-Si2012

    • Author(s)
      M.ARIVANANDHAN, R.GOTOH, K.FUJIWARA, S.UDA, Y.HAYAKAWA, M.KONAGAI
    • Organizer
      59th Spring meeting of Japan Society of Applied Physics
    • Place of Presentation
      Waseda Univercity (Tokyo, Japan)
    • Year and Date
      2012-03-16
  • [Presentation] Growth of Ternary Alloy Semiconductors under Microgravity Experiment2012

    • Author(s)
      Y.HAYAKAWA, M.ARIVANANDHAN, G.RAJESH, M.OMPRAKASH, T.KOYAMA, Y.MOMOSE, A.TANAKA, T.OZAWA, Y.OKANO, K.SAKATA, Y.INATOMI
    • Organizer
      Seminar at Anna University
    • Place of Presentation
      Anna University (Chennai, India)(Invited)
    • Year and Date
      2012-02-23
  • [Presentation] Growth of Homogeneous Si_<1-x>Ge_x and Mg_2Si_<1-x>Ge_x for Thermoelectric Application2012

    • Author(s)
      Y.HAYAKAWA, M.ARIVANANDHAN, M.OMPRAKASH, T.KOYAMA, Y.MOMOSE, H.IKEDA, A.TANAKA, H.TATSUOKA, A.ISHIDA, Y.OKANO, Y.INATOMI, D.K.ASWAL, S.BHATTACHARYA, D.THANGARAJU, S.MOORTHY BABU
    • Organizer
      Seminar at Anna University
    • Place of Presentation
      Anna University (Chennai, India)(Invited)
    • Year and Date
      2012-02-23
  • [Presentation] Growth of homogeneous Si_<1-x>Ge_x and Mg_2Si_<1-x>Ge_x for thermoelectric application2012

    • Author(s)
      Y.HAYAKAWA, M.ARIVANANDHAN, M.OMPRAKASH, T.KOYAMA, Y.MOMOSE, A.TANAKA, H.IKEDA, T.TATSUOKA, A.ISHIDA, Y.INATOMI, D.K.ASWAL, S.BHATTACHARYA, S.MOORTHY BABU
    • Organizer
      International Conference on Recent trends in Advanced Materials (ICRAM)
    • Place of Presentation
      VIT Univercity (Vellore, India)(Invited)
    • Year and Date
      2012-02-21
  • [Presentation] Impact of Ge codoping on the enhancement of minority carrier lifetime in B-doped Czochralski-grown Si2011

    • Author(s)
      M.ARIVANANDHAN, R.GOTOH, T.WATAHIKI, K.FUJIWARA, Y.HAYAKAWA, S.UDA, M.KONAGAI
    • Organizer
      International conference on Advanced Materials
    • Place of Presentation
      PSG College of Technology (Coimbatore, India)(Invited)
    • Year and Date
      2011-12-12
  • [Presentation] The influence of germanium codoping on the reduction of interstitial oxygen concentration in boron-doped Czochralski-silicon : a novel approach to suppress light induced degradation2011

    • Author(s)
      M.ARIVANANDHAN, R.GOTOH, T.WATAHIKI, K.FUJIWARA, Y.HAYAKAWA, M.KONAGAI, S.UDA
    • Organizer
      21^<st> International Photovoltaic Science and Engineering Conference
    • Place of Presentation
      Fukuoka Sea Hawk (Fukuoka, Japan)
    • Year and Date
      2011-11-30
  • [Presentation] Improvement of photovoltaic characteristics of B-doped CZ-Si by Ge codoping2011

    • Author(s)
      M.ARIVANANDHAN, R.GOTOH, T.WATAHIKI, K.FUJIWARA, Y.HAYAKAWA, M.KONAGAI, S.UDA
    • Organizer
      41^<st> National Conference on Crystal Growth
    • Place of Presentation
      Tsukuba Conference Center (Tsukuba, Japan)
    • Year and Date
      2011-11-05
  • [Presentation] Enhancement of Photovoltaic characteristics of CZ grown-Si by Ge codoping2011

    • Author(s)
      M.ARIVANANDHAN, R.GOTOH, T.WATAHIKI, K.FUJIWARA, Y.HAYAKAWA, S.UDA, M.KONAGAI
    • Organizer
      Invited Seminar at Department of Physics, Alagappa University
    • Place of Presentation
      Alagappa University (Karaikudi, India)(Invited)
    • Year and Date
      2011-10-12
  • [Presentation] Thermoelectric properties of compositionally homogeneous Si1-xGex and Mg2Si1-xGex bulk crystals2011

    • Author(s)
      M.ARIVANANDHAN, Y.SAITO, T.KOYAMA, Y.MOMOSE, A.TANAKA, H.IKEDA, T.TATSUOKA, A.ISHIDA, S.BHATTACHARYA, D.K.ASWAL, S.MOORTHY BABU, Y.INATOMI, Y.HAYAKAWA
    • Organizer
      Invited Seminar at Crystal Growth Centre, Anna University
    • Place of Presentation
      Anna University (Chennai, India)(Invited)
    • Year and Date
      2011-10-10
  • [Presentation] Thermoelectric properties of homogeneous Si1-xGex and Mg2Si1-xGex bulk crystals2011

    • Author(s)
      M.ARIVANANDHAN, Y.SAITO, T.KOYAMA, Y.MOMOSE, A.TANAKA, H.IKEDA, T.TATSUOKA, A.ISHIDA, S.BHATTACHARYA, D.K.ASWAL, S.MOORTHY BABU, Y.INATOMI, Y.HAYAKAWA
    • Organizer
      Autumn meetings of Japanese society for applied physics (JSAP)
    • Place of Presentation
      Yamagata Univ.(Yamagata, Japan)
    • Year and Date
      2011-09-02
  • [Remarks]

    • URL

      http://maruhan.rie.shizuoka.ac.jp/

  • [Patent(Industrial Property Rights)] High quality crystalline Silicon with low light induced degradation and its Growth Method2011

    • Inventor(s)
      S.Uda, M.Arivanandhan, R.Gotoh, K.Fujiwara, Y.Hayakawa
    • Industrial Property Rights Holder
      S.Uda, M.Arivanandhan, R.Gotoh, K.Fujiwara, Y.Hayakawa
    • Industrial Property Number
      2011-067402
    • Filing Date
      2011-03-25

URL: 

Published: 2013-06-26  

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