Illumination dependent carrier dynamics of CH3NH3PbBr3 perovskite

Sheng Chen, Xiaoming Wen, Shujuan Huang, Rui Sheng, Martin A. Green, Anita Ho-Baillie

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review

2 Citations (Scopus)

Abstract

The excellent light harvesting properties and potentially low cost fabrication of organometal halide perovskites have attracted great attention in their application as solar cell device. Apart from the general advantages of organic-inorganic perovskite, CH3NH3PbBr3 has a larger bandgap (~2.3eV) suitable to be the top cell in a tandem solar device. Here we use steady-state and time-resolved photoluminescence (PL) techniques to investigate the photophysical behaviour of CH3NH3PbBr3 perovskite including its carrier dynamics under continuous illumination. Samples were studied under different illumination conditions and the following observations were made: (1) defect assisted recombination is dominant under low excitation under nano-second scale measurement, (2) bimolecular and Auger recombinations dominate under high excitation under the minute timescale measurement, (3) the magnitude PL decay traces decrease over time under continuous excitation. We propose that both the density of photo-generated free carriers and the density of mobile ions have an impact on the carrier dynamic of CH3NH3PbBr3. This finding provides insights into the photophysical properties of perovskite materials.
Original languageEnglish
Title of host publicationSPIE Micro+Nano Materials, Devices, and Systems
EditorsBenjamin J. Eggleton, Stefano Palomba
Place of PublicationBellingham, WA
PublisherSPIE
Pages1-6
Number of pages6
ISBN (Electronic)9781628418903
DOIs
Publication statusPublished - 2015
Externally publishedYes
EventSPIE Micro+Nano Materials, Devices, and Applications Symposium - Sydney, Australia
Duration: 6 Dec 20159 Dec 2015

Publication series

NameProceedings of SPIE
PublisherSPIE
Volume9668
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceSPIE Micro+Nano Materials, Devices, and Applications Symposium
CountryAustralia
CitySydney
Period6/12/159/12/15

Keywords

  • fluorescence
  • perovskite
  • carrier dynamics
  • TCSPC
  • Auger recombination

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