We have investigated the film morphology and photoluminescence properties of spin- coated CH3NM3Pbli3xClx films on mesoporous and compact Ti02 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.
|Original language||English (US)|
|Title of host publication||Recent Advances in Photovoltaics|
|Editors||Markus Gloeckler, Jean V. Manca, Tingkai Li, Ivan Mora-Sero, Akira Yamada, Tsutomu Miyasaka, Yanfa Yan, Jin Young Kim, Koen Vandewal, Kai Zhu, Qi Wang, Ayodhya N. Tiwari, Mats Andersson, Emilio Palomares, Michael Mastro, Meng Tao|
|Publisher||Materials Research Society|
|Number of pages||5|
|State||Published - 2016|
|Event||2015 MRS Spring Meeting - San Francisco, United States|
Duration: Apr 6 2015 → Apr 10 2015
|Name||Materials Research Society Symposium Proceedings|
|Other||2015 MRS Spring Meeting|
|Period||4/6/15 → 4/10/15|
Bibliographical noteFunding Information:
This work is supported by the Grant-in-Aid program of the University of Minnesota, UMD Chancellor's Small Grant, and UMD Small Seed Research Grant. Research carried out in part at the Center for Functional Nanomaterials, Brookhaven National Laboratory, which is supported by the U.S. Department of Energy. Office of Basic Energy Sciences, under Contract No. DE-SC0012704.
© 2015 Material Reserch Society.