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Formation of oxygen-doped semiconducting silicides for top-cell materials in Si-based tandem solar cells

Research Project

Project/Area Number 17K18865
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Research Field Electrical and electronic engineering and related fields
Research InstitutionUniversity of Tsukuba

Principal Investigator

Suemasu Takashi  筑波大学, 数理物質系, 教授 (40282339)

Project Period (FY) 2017-06-30 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2018: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2017: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Keywordsタンデム型太陽電池 / トップセル / 禁制帯幅 / スパッタ法 / 吸収端 / 太陽電池 / タンデム / シリサイド半導体 / ドーピング / 不純物
Outline of Final Research Achievements

C or O doped BaSi2 films were formed by sputtering and their optical absorption edge and photoresponsivity were measured. As for C-doped BaSi2 films, the C concentration reached as high as 10 to the power 21 per 1cc, and the photoresponsivity increased markedly compared to undoped BaSi2 films. In addition, the optical absorption edge increased with C composition. However, the crystalline quality of O-doped BaSi2 films degraded when the O concentration reached a value where the expansion of the band gap might occur. Therefore, it can be stated that the high-level doping of O into BaSi2 is difficult.

Academic Significance and Societal Importance of the Research Achievements

低炭素社会を実現するには、市場の9割を占める結晶Si太陽電池のエネルギー変換効率の大幅な向上が欠かせない。このためには、結晶Siと組み合わせて、2接合タンデム型太陽電池を形成する必要がある。その場合、最適な半導体の禁制帯幅は 1.6~1.7eVであるが、Si基板上に高品質で製膜が可能な、そのような半導体が限られることがボトルネックになっていた。本研究では、炭素ドープBaSi2において、禁制帯幅拡大を示唆する結果が得られたこと、さらに、炭素濃度が1cc当たり10の21乗台においても、分光感度が極端に大きいことを実証した。このため、BaSi2は、トップセル材料として有力な候補であるといえる。

Report

(3 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • Research Products

    (23 results)

All 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (14 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 14 results,  Open Access: 3 results) Presentation (5 results) (of which Int'l Joint Research: 3 results,  Invited: 3 results) Remarks (1 results)

  • [Int'l Joint Research] Beralusian State University(ベラルーシ)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University Grenoble Aples(フランス)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Delft University of Technology(オランダ)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Simple way of finding Ba to Si deposition rate ratios for high photoresponsivity in BaSi2 films by Raman spectroscopy2019

    • Author(s)
      Yamashita Yudai、Takahara Yuuki、Sato Takuma、Toko Kaoru、Uedono Akira、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 5 Pages: 055506-055506

    • DOI

      10.7567/1882-0786/ab14b9

    • NAID

      120007127924

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Operation of BaSi2 homojunction solar cells on p+-Si(111) substrates and the effect of structure parameters on their performance2019

    • Author(s)
      Kodama Komomo、Yamashita Yudai、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 4 Pages: 041005-041005

    • DOI

      10.7567/1882-0786/ab0c4f

    • NAID

      120007128045

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impact of deposition pressure and two-step growth technique on the photoresponsivity enhancement of polycrystalline BaSi2 films formed by sputtering2019

    • Author(s)
      Matsuno Satoshi、Nemoto Taira、Mesuda Masami、Kuramochi Hideto、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 12 Issue: 2 Pages: 021004-021004

    • DOI

      10.7567/1882-0786/aafc70

    • NAID

      120007128046

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Investigation of electrically active defects in undoped BaSi2 light absorber layers using deep-level transient spectroscopy2018

    • Author(s)
      Yamashita Yudai、Sato Takuma、Bayu Miftahullatif Emha、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 7 Pages: 075801-075801

    • DOI

      10.7567/jjap.57.075801

    • NAID

      210000149263

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Identification of Vibrational Modes in BaSi<sub>2</sub> Epitaxial Films by Infrared and Raman Spectroscopy2018

    • Author(s)
      Hoshida Hirofumi、Murakoso Naoki、Suemasu Takashi、Terai Yoshikazu
    • Journal Title

      Defect and Diffusion Forum

      Volume: 386 Pages: 43-47

    • DOI

      10.4028/www.scientific.net/ddf.386.43

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Significant photoresponsivity enhancement of polycrystalline BaSi2 films formed on heated Si(111) substrates by sputtering2018

    • Author(s)
      Matsuno Satoshi、Takabe Ryota、Yokoyama Seiya、Toko Kaoru、Mesuda Masami、Kuramochi Hideto、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 11 Issue: 7 Pages: 071401-071401

    • DOI

      10.7567/apex.11.071401

    • NAID

      120007134088

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Detection of local vibrational modes induced by intrinsic defects in undoped BaSi2 light absorber layers using Raman spectroscopy2018

    • Author(s)
      Takuma Sato, Hirofumi Hoshida, Ryota Takabe, Kaoru Toko, Yoshikazu Terai, and Takashi Suemasu
    • Journal Title

      Journal of Applied Physics

      Volume: 124 Issue: 2 Pages: 025301-025301

    • DOI

      10.1063/1.5029320

    • NAID

      120007134086

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Transport properties of n- and p-type polycrystalline BaSi 22018

    • Author(s)
      Deng T.、Suemasu T.、Shohonov D.A.、Samusevich I.S.、Filonov A.B.、Migas D.B.、Borisenko V.E.
    • Journal Title

      Thin Solid Films

      Volume: 661 Pages: 7-15

    • DOI

      10.1016/j.tsf.2018.07.006

    • NAID

      120007134083

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] p-BaSi2/n-Si heterojunction solar cells on Si(001) with conversion efficiency approaching 10%: comparison with Si(111)2018

    • Author(s)
      Deng Tianguo、Sato Takuma、Xu Zhihao、Takabe Ryota、Yachi Suguru、Yamashita Yudai、Toko Kaoru、Suemasu Takashi
    • Journal Title

      Applied Physics Express

      Volume: 11 Issue: 6 Pages: 062301-062301

    • DOI

      10.7567/apex.11.062301

    • NAID

      120007134298

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Improving the photoresponse spectra of BaSi2 layers by capping with hydrogenated amorphous Si layers prepared by radio-frequency hydrogen plasma2018

    • Author(s)
      Xu Zhihao、Gotoh Kazuhiro、Deng Tianguo、Sato Takuma、Takabe Ryota、Toko Kaoru、Usami Noritaka、Suemasu Takashi
    • Journal Title

      AIP Advances

      Volume: 8 Issue: 5 Pages: 055306-055306

    • DOI

      10.1063/1.5025021

    • NAID

      120007134303

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Spectroscopic evidence of photogenerated carrier separation by built-in electric field in Sb-doped n-BaSi2/B-doped p-BaSi2 homojunction diodes2018

    • Author(s)
      Komomo Kodama, Ryota Takabe, Tianguo Deng, Kaoru Toko, and Takashi Suemasu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 5 Pages: 050310-050310

    • DOI

      10.7567/jjap.57.050310

    • NAID

      120007134328

    • Related Report
      2018 Annual Research Report 2017 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Reduction in interface defect density in p-BaSi2/n-Si heterojunction solar cells by a modified pretreatment of the Si substrate2018

    • Author(s)
      Yudai Yamashita, Suguru Yachi, Ryota Takabe, Takuma Sato, Miftahullatif Emha Bayu, Kaoru Toko, and Takashi Suemasu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 2 Pages: 025501-025501

    • DOI

      10.7567/jjap.57.025501

    • NAID

      120007134591

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Effect of BaSi2 template growth duration on the generation of defects and performance of p-BaSi2/n-Si heterojunction solar cells2018

    • Author(s)
      Suguru Yachi, Ryota Takabe, Tianguo Deng, Kaoru Toko, and Takashi Suemasu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 4 Pages: 042301-042301

    • DOI

      10.7567/jjap.57.042301

    • NAID

      120007134326

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Journal Article] Decrease in electrical contact resistance of Sb-doped n+-BaSi2 layers and spectral response of an Sb-doped n+-BaSi2/undoped BaSi2 structure for solar cells2018

    • Author(s)
      Komomo Kodama, Ryota Takabe, Suguru Yachi, Kaoru Toko, and Takashi Suemasu
    • Journal Title

      Japanese Journal of Applied Physics

      Volume: 57 Issue: 3 Pages: 031202-031202

    • DOI

      10.7567/jjap.57.031202

    • NAID

      120007134590

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] Significant impact of Ba to Si deposition rate ratios during molecular beam epitaxy on electrical and optical properties of BaSi2 absorber layers2018

    • Author(s)
      Takashi Suemasu
    • Organizer
      Forum on the Science and Techonology of Silicon Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Recent achievements towards high-efficiency BaSi2 homojunction solar cells2018

    • Author(s)
      Takashi Suemasu
    • Organizer
      10th International WorkShop on Crystalline Siliciond for Solar Cells
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Present status and future prospect of BaSi2 solar cells2018

    • Author(s)
      Takashi Suemasu
    • Organizer
      4th International Asian School Conference on Physics and Technology of Nanostructured Materials
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] ヘリコン波プラズマスパッタ法によるSi基板上多結晶BaSi2膜の作製2018

    • Author(s)
      松野賢司
    • Organizer
      第65回応用物理学会春季学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] ヘリコン波プラズマスパッタ法によるSi (111)基板上BaSi2膜の作製2018

    • Author(s)
      松野 賢司
    • Organizer
      第78回応用物理学会秋季学術講演会
    • Related Report
      2017 Research-status Report
  • [Remarks] 環境半導体・磁性体研究室

    • URL

      http://www.bk.tsukuba.ac.jp/~ecology/publications.html

    • Related Report
      2018 Annual Research Report

URL: 

Published: 2017-07-21   Modified: 2020-03-30  

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