Journal
SCRIPTA MATERIALIA
Volume 102, Issue -, Pages 51-54Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.01.030
Keywords
Spontaneous polarization; Hybrid halide perovskite; Plasma resonance; Ellipsometry; Ferroelectric domain
Categories
Funding
- One Hundred Talents Project Foundation Program
- West Light Foundation of the Chinese Academy of Sciences [XBBS-2014-04, RCPY201206]
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Spontaneous polarization behaviors of hybrid perovskite CH3NH3PbI3 film were confirmed by in situ PPM and spectroscopic ellipsometry. The film exhibits uniform spontaneous polarization and ferroelectric domain inversion performance. The fitted dielectric constants spectra agree well with the calculated ones. We attribute the spontaneous polarization behaviors of hybrid perovskite to lone pair electrons, and its outstanding photovoltaic performance partially originates from spontaneous polarization and plasma resonance. This report will facilitate understanding of the instinct physical essence of hybrid perovskite solar cells. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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