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Proceedings Paper

Illumination dependent carrier dynamics of CH3NH3PbBr3 perovskite
Author(s): Sheng Chen; Xiaoming Wen; Shujuan Huang; Rui Sheng; Martin A. Green; Anita Ho-Baillie
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Paper 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.

Paper Details

Date Published: 22 December 2015
PDF: 6 pages
Proc. SPIE 9668, Micro+Nano Materials, Devices, and Systems, 96681R (22 December 2015); doi: 10.1117/12.2202176
Show Author Affiliations
Sheng Chen, The Univ. of New South Wales (Australia)
Xiaoming Wen, The Univ. of New South Wales (Australia)
Shujuan Huang, The Univ. of New South Wales (Australia)
Rui Sheng, The Univ. of New South Wales (Australia)
Martin A. Green, The Univ. of New South Wales (Australia)
Anita Ho-Baillie, The Univ. of New South Wales (Australia)


Published in SPIE Proceedings Vol. 9668:
Micro+Nano Materials, Devices, and Systems
Benjamin J. Eggleton; Stefano Palomba, Editor(s)

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