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The Effect of Titanium Oxide Substrate on the Film Morphology and Photoluminescence Properties of Organometal Halide Perovskites

Published online by Cambridge University Press:  16 June 2015

Zhihua Xu  and
Zhengtao Chen
Zhihua Xu
Affiliation:
Department of Chemical Engineering, University of Minnesota-Duluth, Duluth, MN 55812, U.S.A.
Zhengtao Chen
Affiliation:
Department of Chemical Engineering, University of Minnesota-Duluth, Duluth, MN 55812, U.S.A.
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Abstract

We have investigated the film morphology and photoluminescence properties of spin-coated CH3NH3PbI3-xClx films on mesoporous and compact TiO2 substrates. We observe that the perovskite film deposited on the mesoporous substrate composed of 20 nm TiO2 nanopaticles exhibits relatively uniform grain size, while the films deposited on the compact TiO2 substrate and the mesoporous substrate with large TiO2 nanoparticles (200 nm) show highly heterogeneous film morphology. The heterogeneity of film morphology has significant effect on the photoluminescence spectra and lifetime of the perovskite films. The result of time-resolved confocal microscopy unveils the relation between film structure and photoluminescence properties.

Keywords

energy generationoptoelectronicphotovoltaic
Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1771: Symposium B/C/D/E – Recent Advances in Photovoltaics , 2015 , pp. 181 - 185
Copyright
Copyright © Materials Research Society 2015 

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References

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