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Fabrication of hetero-junction with continuous interface for improvement of Si solar cell characteristics

Research Project

Project/Area Number 18K13790
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 21050:Electric and electronic materials-related
Research InstitutionOsaka University

Principal Investigator

Imamura Kentaro  大阪大学, 産業科学研究所, 准教授 (60591302)

Project Period (FY) 2018-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsシリコン太陽電池 / ナノシリコン / ヘテロ接合
Outline of Final Research Achievements

A nanocrystalline silicon layer/crystalline silicon structure was formed by use of the surface structure chemical transfer method. The reaction condition to form a uniform nanocrystalline silicon layer was optimized by investigation of the structure using transmission electron microscope. The porosity profile of the nanocrystalline silicon layer was estimated by ellipsometrical analysis. The energy band structure was estimated by X-ray photoelectron spectroscopy, photoluminescence, and Kelvin probe force microscope measurements. This study made it possible to form a nanocrystalline silicon layer/crystalline silicon structure with a steep band structure. Further development of boron diffusion process will lead to improvement of the conversion efficiency of the nanocrystalline silicon layer/silicon solar cells.

Academic Significance and Societal Importance of the Research Achievements

結晶シリコン太陽電池は、市販される太陽電池の9割以上を占めており、エネルギー問題を解決するための重要なエネルギー変換デバイスである。結晶シリコン太陽電池開発には、高効率化と低コスト化によって発電コストを低減させることが求められている。本研究によって、形成したナノ結晶シリコン層/結晶シリコン構造は急峻なバンド構造を有しており、太陽電池の再結合電流の低減による開放電圧の向上に有望な構造である。また、本研究で用いた方法は、低コストな非真空プロセスであり、発電コストの低減につながる。

Report

(3 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • Research Products

    (6 results)

All 2020 2019

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (4 results) (of which Int'l Joint Research: 2 results)

  • [Journal Article] Enhancement of Boron Back-Surface-Field and Suppression of Auger Recombination to Improve Ultralow-Reflectance Si Solar Cells2020

    • Author(s)
      Kunieda Shogo、Imamura Kentaro、Kobayashi Hikaru
    • Journal Title

      ECS Journal of Solid State Science and Technology

      Volume: 9 Issue: 4 Pages: 045013-045013

    • DOI

      10.1149/2162-8777/ab8b6e

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Black silicon-correlation between microstructure and Raman scattering2019

    • Author(s)
      Jurecka Stanislav, Pincik Emil, Imamura Kentaro, Matsumoto Taketoshi, Kobayashi Hikaru
    • Journal Title

      Journal of Electrical Engineering

      Volume: 70 Issue: 7 Pages: 58-64

    • DOI

      10.2478/jee-2019-0042

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] ベイズ最適化法を用いる拡散工程の最適化によるSi太陽電池の高効率化2020

    • Author(s)
      國枝省吾, 今村健太郎, 小林光
    • Organizer
      第67回応用物理学会春季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Machine learning optimization of diffusion process for black Si solar cells fabricated with surface structure chemical transfer method2020

    • Author(s)
      S. Kunieda, K. Imamura, H. Kobayashi
    • Organizer
      The 23rd SANKEN International Symposium, The 18th SANKEN Nanotechnology International Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] シリコンナノクリスタル層/シリコン構造による結晶シリコン表面でのキャリア再結合の防止2019

    • Author(s)
      鬼塚裕也, 今村健太郎, 小林光
    • Organizer
      第80回応用物理学会秋季学術講演会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Analysis of band-structure of nanocrystalline Si layer for high efficiency Si solar cells2019

    • Author(s)
      Y. Onitsuka, K. Imamura, H. Kobayashi
    • Organizer
      The 22nd SANKEN International Symposium, The 17th SANKEN Nanotechnology International Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2018-04-23   Modified: 2021-02-19  

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