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Proceedings Paper

Carrier-phonon interactions in hybrid halide perovskites probed with ultrafast anisotropy studies
Author(s): Jasmine P. H. Rivett; Johannes M. Richter; Michael B. Price; Dan Credgington; Felix Deschler
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Paper Abstract

Hybrid halide perovskites are at the frontier of optoelectronic research due to their excellent semiconductor properties and solution processability. For this reason, much attention has recently been focused on understanding photoexcited charge-carrier generation and recombination in these materials. Conversely, very few studies have so far been devoted to understanding carrier-carrier and carrier-phonon scattering mechanisms in these materials. This is surprising given that carrier scattering mechanisms fundamentally limit charge-carrier motilities and therefore the performance of photovoltaic devices. We apply linear polarization selective transient absorption measurements to polycrystalline CH3NH3PbBr3 hybrid halide perovskite films as an effective way of studying the scattering processes in these materials. Comparison of the photo induced bleach signals obtained when the linear polarizations of the pump and probe are aligned either parallel or perpendicular to one another, reveal a significant difference in spectral intensity and shape within the first few hundred femtoseconds after photoexcitation.

Paper Details

Date Published: 26 September 2016
PDF: 4 pages
Proc. SPIE 9923, Physical Chemistry of Interfaces and Nanomaterials XV, 99231E (26 September 2016); doi: 10.1117/12.2238906
Show Author Affiliations
Jasmine P. H. Rivett, Univ. of Cambridge (United Kingdom)
Johannes M. Richter, Univ. of Cambridge (United Kingdom)
Michael B. Price, Univ. of Cambridge (United Kingdom)
Dan Credgington, Univ. of Cambridge (United Kingdom)
Felix Deschler, Univ. of Cambridge (United Kingdom)


Published in SPIE Proceedings Vol. 9923:
Physical Chemistry of Interfaces and Nanomaterials XV
Artem A. Bakulin; Robert Lovrincic; Natalie Banerji, Editor(s)

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