Formamidinium Lead Bromide (FAPbBr3) Perovskite Microcrystals for Sensitive and Fast Photodetectors

Research output: Contribution to journalArticle

Abstract

Because of the good thermal stability and superior carrier transport characteristics of formamidinium lead trihalide perovskite HC(NH2)2PbX3 (FAPbX3), it has been considered to be a better optoelectronic material than conventional CH3NH3PbX3 (MAPbX3). Herein, we fabricated a FAPbBr3 microcrystal-based photodetector that exhibited a good responsivity of 4000 A W−1 and external quantum efficiency up to 106% under one-photon excitation, corresponding to the detectivity greater than 1014 Jones. The responsivity is two orders of magnitude higher than that of previously reported formamidinium perovskite photodetectors. Furthermore, the FAPbBr3 photodetector’s responsivity to two-photon absorption with an 800-nm excitation source can reach 0.07 A W−1, which is four orders of magnitude higher than that of its MAPbBr3 counterparts. The response time of this photodetector is less than 1 ms. This study provides solid evidence that FAPbBr3 can be an excellent candidate for highly sensitive and fast photodetectors.[Figure not available: see fulltext.].

Details

Authors
  • Fengying Zhang
  • Bin Yang
  • Kaibo Zheng
  • Songqiu Yang
  • Yajuan Li
  • Weiqiao Deng
  • Rongxing He
Organisations
External organisations
  • Southwest University
  • Dalian Institute of Chemical Physics
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Condensed Matter Physics
  • Physical Chemistry

Keywords

  • External quantum efficiency, Formamidinium lead trihalide (FAPbBr), Perovskite microcrystals, Photodetector
Original languageEnglish
Article number43
JournalNano-Micro Letters
Volume10
Issue number3
Publication statusPublished - 2018 Sep 1
Publication categoryResearch
Peer-reviewedYes