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Developing novel p-type BiOX oxyhalides thin layer for stable and efficient CsPbI3 perovskite solar cells

Research Project

Project/Area Number 20K15385
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 36020:Energy-related chemistry
Research InstitutionToin University of Yokohama

Principal Investigator

Guo Zhanglin  桐蔭横浜大学, 工学研究科, 特任助教 (40869559)

Project Period (FY) 2020-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywordsペロブスカイト太陽電池 / 全無機ペロブスカイト / 高電圧 / perovskite solar cells / all-inorganic perovskite / high voltage / high efficiency / surface passivation / all-inorganic CsPbX3 / BiOX
Outline of Research at the Start

Phase instability, caused by moisture, is the main barrier in developing CsPbI3 solar cells. P-type inorganic BiOX (X=I, F, Cl, Br) are very stable against moisture and heat. This project will focuse on constructing an ultra-thin BiOX layer to protect CsPbI3. The preparation of BiOX on CsPbI3 will be explored, including optimizing the solvents, spin-coating and annealing process. The bonding between perovskite and BiOX, the hole transfer through interface will be studied. The BiOX compounds will be compared to clarify the effect of halide ions on the device performance and stability.

Outline of Final Research Achievements

CsPbX3 (X=I, Br) perovskite solar cells (PSCs) have potential applications in tandem solar cells and indoor photovoltaics. While the low efficiency and poor stability are limiting their perspectives. This project is aiming at developing efficient and stable CsPbX3 PSCs and the following results were achieved.
Firstly, charge transport materials of amorphous SnOx and dopant-free polymer PDTDT were developed, by which the high efficiency especially the high voltage, and good stability of CsPbX3 PSCs were realized. These materials can be used in other research on CsPbX3 PSCs. Secondly, the CsPbX3 perovskite defects (undercoordinated Pb2+ and metallic Pb) were well suppressed by a molecule surface passivation method, promoting the voltage of solar cells to over 92% of the theoretical limit. In summary, these researches solved the problem of the low efficiency of CsPbX3 PSCs by increasing the voltage. The stability of CsPbX3 PSCs was also improved by using the dopant-free PDTDT.

Academic Significance and Societal Importance of the Research Achievements

この研究は、CsPbX3太陽電池の電圧損失と不安定性の問題を解決しました。 その結果、タンデム太陽電池や屋内太陽光発電への応用がより有望になります。
トップセルとしてCsPbX3を使用すると、タンデム太陽電池で2 Vを超える高電圧と30%を超える効率が達成され、Siパネルよりも効率的な太陽電池を提供できます。 十分な電力と駆動電圧を提供するCsPbX3屋内太陽電池を使用することで、セルフパワーのIoTシステムを実現できます。

Report

(3 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2022 2021 2020

All Journal Article (2 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results) Presentation (4 results) (of which Int'l Joint Research: 4 results,  Invited: 1 results) Book (1 results) Patent(Industrial Property Rights) (1 results)

  • [Journal Article] Dopant‐Free Polymer HTM‐Based CsPbI2Br Solar Cells with Efficiency Over 17% in Sunlight and 34% in Indoor Light2021

    • Author(s)
      Guo Zhanglin、Jena Ajay Kumar、Takei Izuru、Ikegami Masashi、Ishii Ayumi、Numata Youhei、Shibayama Naoyuki、Miyasaka Tsutomu
    • Journal Title

      Advanced Functional Materials

      Volume: 31 Issue: 42 Pages: 2103614-2103614

    • DOI

      10.1002/adfm.202103614

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Voc Over 1.4 V for Amorphous Tin-Oxide-Based Dopant-Free CsPbI2Br Perovskite Solar Cells2020

    • Author(s)
      Guo Zhanglin、Jena Ajay Kumar、Takei Izuru、Kim Gyu Min、Kamarudin Muhammad Akmal、Sanehira Yoshitaka、Ishii Ayumi、Numata Youhei、Hayase Shuzi、Miyasaka Tsutomu
    • Journal Title

      Journal of the American Chemical Society

      Volume: 142 Issue: 21 Pages: 9725-9734

    • DOI

      10.1021/jacs.0c02227

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] High Voc of all-inorganic CsPbX3 perovskite solar cells2022

    • Author(s)
      Zhanglin Guo, Ajay Kumar Jena, Tsutomu Miyasaka
    • Organizer
      ICYRAM 2022
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] CsPbI2Br Perovskite Solar Cells with Voc Over 1.4 V2021

    • Author(s)
      Zhanglin Guo, Tsutomu Miyasaka
    • Organizer
      The 8th Conference on Science and Technology of Emerging Solar Energy Materials
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] VOC over 1.4 V for amorphous tin oxide-based dopant-free CsPbI2Br perovskite solar cells2021

    • Author(s)
      Guo Zhanglin
    • Organizer
      Pacifichem 2021 Congress
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Interfacial Engineering for High Voltage (>1.4V) Performance of Inorganic Perovskite Solar Cells2021

    • Author(s)
      Tsutomu Miyasaka
    • Organizer
      2021 MRS Spring Meeting & Exhibit
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research / Invited
  • [Book] Perovskite Photovoltaics and Optoelectronics: From Fundamentals to Advanced Applications, Chapter 92022

    • Author(s)
      Ajay K. Jena, Zhanglin Guo, Tsutomu Miyasaka
    • Total Pages
      48
    • Publisher
      Wiley-VCH
    • ISBN
      3527347488
    • Related Report
      2021 Annual Research Report
  • [Patent(Industrial Property Rights)] 光電変換素子及び発電デバイス2021

    • Inventor(s)
      宮坂 力、郭 章林、アジェイ クマー ジェナ、武井 出
    • Industrial Property Rights Holder
      宮坂 力、郭 章林、アジェイ クマー ジェナ、武井 出
    • Industrial Property Rights Type
      特許
    • Industrial Property Number
      2021-053883
    • Filing Date
      2021
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2023-01-30  

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