Imaging ultrafast photocarrier trapping in perovskite photovoltaic materials

2021 Fiscal Year Annual Research Report

• Project/Area Number: 19K05637
• Research Institution: Okinawa Institute of Science and Technology Graduate University
• Principal Investigator: Dani Keshav 沖縄科学技術大学院大学, フェムト秒分光法ユニット, 准教授 (80630946)
• Project Period (FY): 2019-04-01 – 2022-03-31
• Keywords: Perovskite / photovoltaic films / time-resolved / photoemission / electron microscopy

Outline of Annual Research Achievements

In FY2021, we completed and published two studies of state-of-the-art perovskite photovoltaic films using time-resolved photoemission electron microscopy techniques. For the first study, in FY2021, we completed preparation of the manuscript, the rebuttal to the referees and final submission for publication [Energy and Environmental Science 2021 14 6320]. For the second study, we studied the degradation process at local nanoscale phase impurity sites as the perovskite film was exposed to light. In FY2021, we completed the preparation of the manuscript and the rebuttal to the referees. The manuscript was informally accepted for publication on 1st April 2022 [Nature accepted (2022)].

Research Products

• [Int'l Joint Research] the University of Cambridge(英国)
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: the University of Cambridge
• [Journal Article] Local Nanoscale Phase Impurities are Degradation Sites in Halide Perovskites (2022)
  • Author(s): Macpherson Stuart、Doherty Tiarnan A. S.、Winchester Andrew J.、Kosar Sofiia、Johnstone Duncan N.、Chiang Yu-Hsien、Galkowski Krzystof、Anaya Miguel、Frohna Kyle、Iqbal Affan N.、Nagane Satyawan、Roose Bart、Andaji-Garmaroudi Zahra、Orr Kieran W. P.、Parker Julia E.、Midgley Paul A.、Dani Keshav M.、Stranks Samuel D.
  • Journal Title: Nature Volume: - Pages: -
  • DOI: 10.1038/s41586-022-04872-1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Unraveling the varied nature and roles of defects in hybrid halide perovskites with time-resolved photoemission electron microscopy (2021)
  • Author(s): Kosar Sofiia、Winchester Andrew J.、Doherty Tiarnan A. S.、Macpherson Stuart、Petoukhoff Christopher E.、Frohna Kyle、Anaya Miguel、Chan Nicholas S.、Madeo Julien、Man Michael K. L.、Stranks Samuel D.、Dani Keshav M.
  • Journal Title: Energy and Environmental Science Volume: 14 Pages: 6320～6328
  • DOI: 10.1039/D1EE02055B
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Understanding the role of nanoscale defect clusters in hybrid perovskite photovoltaics with time-resolved photoemission electron microscopy, (2022)
  • Author(s): Keshav M. Dani
  • Organizer: NanoGe Spring Meeting 2022
  • Int'l Joint Research / Invited
• [Presentation] Exploring defects in triple cation mixed halide perovskite thin films using time-resolved photoemission electron microscopy (2022)
  • Author(s): Sofiia Kosar
  • Organizer: NanoGe Spring Meeting 2022
  • Int'l Joint Research
• [Presentation] Imaging photoexcited phenomena in real and momentum space (2022)
  • Author(s): Keshav M. Dani
  • Organizer: Materials Science and Engineering (MSE) Colloquium
  • Int'l Joint Research / Invited
• [Presentation] Investigation of Heterogeneous Charge Trapping Dynamics at Nanoscale Defects in Triple Cation Mixed Halide Perovsktie Thin Films (2021)
  • Author(s): Sofiia Kosar
  • Organizer: MRS Spring Meeting 2021
  • Int'l Joint Research