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2022 Fiscal Year Annual Research Report

Research of decomposition mechanism of mixed cation-anionic metal halide perovskite material

Research Project

Project/Area Number 21F21754
Allocation TypeSingle-year Grants
Research InstitutionOkinawa Institute of Science and Technology Graduate University

Principal Investigator

Qi Yabing  沖縄科学技術大学院大学, エネルギー材料と表面科学ユニット, 教授 (10625015)

Co-Investigator(Kenkyū-buntansha) MARIOTTI SILVIA  沖縄科学技術大学院大学, エネルギー材料と表面科学ユニット, 外国人特別研究員
Project Period (FY) 2021-11-18 – 2024-03-31
KeywordsPerovskite / self-assembly monolayers / perovskite solar modules / surface passivation
Outline of Annual Research Achievements

In FY2022 the fellow worked on several research projects and supervised two PhD students. In particular, she worked on three projects: the first focuses on the passivation of the perovskite layer using phenethyl ammonium-halide molecules with the aim to understand the mechanism of these molecules on the perovskite surface, specifically taking into account different perovskite compositions and the effect of different halides (iodine, bromine and chlorine). It is in fact well known in literature that these passivation molecules improve both stability and device performance, but there is no unanimous agreement on the chemical mechanism. The second project focuses on developing new deposition methods for the commonly used self-assembly molecule (2PACz), used as hole transporting material in p-i-n device configuration. This is usually spin-coated and this deposition methos has shown to be effective in making high performing devices but does not allow a uniform coverage on large area devices. We therefore show that alternative deposition methods can be employed, such as thermal evaporation and spray-coating techniques, with the latter being particularly effective for high or even higher device performances compared to the traditional spin-coating method. The fellow also tried to fabricate large area devices (area 22.4cm2) but the performances of control devices remain low due to difficulties in depositing part of the device on large area. The third project is at early stages and involves new electron transporting molecules to be used as self-assembly molecules.

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

In FY2022 the fellow has being facing issues in fabricating high quality perovskite solar cells, which has cost her considerable time and effort. Nevertheless, perseverance has brought to an improvement of the device performance and she is now hoping to finish her projects soon. Nevertheless, she is still experiencing issues in fabricating large area modules, achieving efficiencies of up to 15% compared to 20% obtained by other groups in the world. Although part of the reasons for the low performance have been found, more experiments are required to optimize the module device performance.

Strategy for Future Research Activity

The plan for FY2023 consists in terminating the fellow’s projects, and write articles for submission. While fundamental experiments have been already performed, the fellow needs to perform surface analysis characterization on phenethyl ammonium passivated samples, to determine the interaction of the organic salt with the perovskite surface, using XPS and UPS. In addition, the fellow would like to terminate the hole transporting material self-assembly project by showing results on perovskite solar modules, which would help to submit the manuscript to a higher impact factor journal. Hence, the fellow will concentrate on the fabrication of large area devices which need a thorough optimization in order to achieve module performances and stability comparable to those presented in literature. In particular, she will consider alternative device architectures that are more suited for large area device fabrication, such as the evaporation deposition method. If she succeeds she will then try to certify those solar modules at AIST (Tsukuba, JP), where the fellow has established a strong collaboration in FY2022. For the third and last project, where the fellow wants to use electron transporting material self-assembly project, she is still determining the best molecular structure by simulations. Nevertheless, preliminary work has shown that the concept can be used to fabricate highly efficient working n-i-p perovskite devices.

  • Research Products

    (7 results)

All 2023 2022

All Journal Article (7 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 2 results,  Open Access: 6 results)

  • [Journal Article] Controllable Anion Exchange on Perovskite Nanocrystal Solid-State Thin Films2023

    • Author(s)
      Congyang Zhang, Chenfeng Ding, Shuai Yuan, Luis K Ono, Caiyi Zhang, Tianhao Wu, Silvia Mariotti, Penghui Ji, Tongtong Li, Jiahao Zhang, Yabing Qi
    • Journal Title

      The Journal of Physical Chemistry C

      Volume: 127 Pages: 9947-9956

    • DOI

      10.1021/acs.jpcc.3c02281

    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Graphene‐Like Conjugated Molecule as Hole‐Selective Contact for Operationally Stable Inverted Perovskite Solar Cells and Modules2023

    • Author(s)
      Tianhao Wu, Xiushang Xu, Luis K Ono, Ting Guo, Silvia Mariotti, Chenfeng Ding, Shuai Yuan, Congyang Zhang, Jiahao Zhang, Kirill Mitrofanov, Qizheng Zhang, Saurav Raj, Xiao Liu, Hiroshi Segawa, Penghui Ji, Tongtong Li, Ryota Kabe, Liyuan Han, Akimitsu Narita, Yabing Qi
    • Journal Title

      Advanced Materials

      Volume: 35 Pages: 2300169

    • DOI

      10.1002/adma.202300169

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A hole injection monolayer enables cost-effective perovskite light-emitting diodes2023

    • Author(s)
      Zhang Congyang、Mariotti Silvia、Ono Luis K.、Ding Chenfeng、Mitrofanov Kirill、Zhang Caiyi、Yuan Shuai、Ji Penghui、Zhang Jiahao、Wu Tianhao、Kabe Ryota、Qi Yabing
    • Journal Title

      Journal of Materials Chemistry C

      Volume: 11 Pages: 2851~2862

    • DOI

      10.1039/d2tc05491d

    • Open Access
  • [Journal Article] Holistic Strategies Lead to Enhanced Efficiency and Stability of Hybrid Chemical Vapor Deposition Based Perovskite Solar Cells and Modules2023

    • Author(s)
      Tong Guoqing、Zhang Jiahao、Bu Tongle、Ono Luis K.、Zhang Congyang、Liu Yuqiang、Ding Chenfeng、Wu Tianhao、Mariotti Silvia、Kazaoui Said、Qi Yabing
    • Journal Title

      Advanced Energy Materials

      Volume: / Pages: 2300153

    • DOI

      10.1002/aenm.202300153

    • Open Access / Int'l Joint Research
  • [Journal Article] Local Built‐In Field at the Sub‐nanometric Heterointerface Mediates Cascade Electrochemical Conversion of Lithium?sulfur Batteries2023

    • Author(s)
      Ding Chenfeng、Niu Mang、Cassidy Cathal、Kang Hyung‐Been、Ono Luis K.、Wang Hengyuan、Tong Guoqing、Zhang Congyang、Liu Yuan、Zhang Jiahao、Mariotti Silvia、Wu Tianhao、Qi Yabing
    • Journal Title

      Small

      Volume: 50 Pages: e2301755

    • DOI

      10.1002/smll.202301755

    • Open Access / Int'l Joint Research
  • [Journal Article] Elimination of light-induced degradation at the nickel oxide-perovskite heterojunction by aprotic sulfonium layers towards long-term operationally stable inverted perovskite solar cells2022

    • Author(s)
      Wu Tianhao、Ono Luis K.、Yoshioka Rengo、Ding Chenfeng、Zhang Congyang、Mariotti Silvia、Zhang Jiahao、Mitrofanov Kirill、Liu Xiao、Segawa Hiroshi、Kabe Ryota、Han Liyuan、Qi Yabing
    • Journal Title

      Energy & Environmental Science

      Volume: 15 Pages: 4612~4624

    • DOI

      10.1039/D2EE01801B

    • Open Access / Int'l Joint Research
  • [Journal Article] Ion-regulating Hybrid Electrolyte Interface for Long-life and Low N/P Ratio Lithium Metal Batteries2022

    • Author(s)
      Ding Chenfeng、Liu Yuan、Ono Luis K.、Tong Guoqing、Zhang Congyang、Zhang Jiahao、Lan Jinle、Yu Yunhua、Chen Bingbing、Qi Y.B.
    • Journal Title

      Energy Storage Materials

      Volume: 50 Pages: 417~425

    • DOI

      10.1016/j.ensm.2022.05.035

    • Open Access / Int'l Joint Research

URL: 

Published: 2023-12-25  

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