CH3NH3PbBr3 is not pyroelectric, excluding ferroelectric-enhanced photovoltaic performance

被引：44

作者：

Rakita, Yevgeny ^{[1
]}

Meirzadeh, Elena ^{[1
]}

Bendikov, Tatyana ^{[1
,2
]}

Kalchenko, Vyacheslav ^{[3
]}

Lubomirsky, Igor ^{[1
]}

Hodes, Gary ^{[1
]}

Ehre, David ^{[1
]}

Cahen, David ^{[1
]}

机构：

[1] Weizmann Inst Sci, Mat & Interfaces, IL-7610001 Rehovot, Israel

[2] Weizmann Inst Sci, Chem Res Support, IL-7610001 Rehovot, Israel

[3] Weizmann Inst Sci, Vet Resources Dept, IL-7610001 Rehovot, Israel

来源：

APL MATERIALS | 2016年 / 4卷 / 05期

基金：

以色列科学基金会; 美国国家科学基金会;

关键词：

HALIDE PEROVSKITES; SINGLE-CRYSTAL; AMINO-ACIDS; TRANSITION; ORIGIN; SEMICONDUCTORS; MOBILITIES; SRTIO3; ENERGY; OXIDES;

D O I：

10.1063/1.4949760

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

To experimentally (dis) prove ferroelectric effects on the properties of lead-halide perovskites and of solar cells, based on them, we used second-harmonic-generation spectroscopy and the periodic temperature change (Chynoweth) technique to detect the polar nature of methylammonium lead bromide (MAPbBr3). We find that MAPbBr3 is probably centrosymmetric and definitely non-polar; thus, it cannot be ferroelectric. Whenever pyroelectric-like signals were detected, they could be shown to be due to trapped charges, likely at the interface between the metal electrode and the MAPbBr3 semiconductor. These results indicate that the ferroelectric effects do not affect steady-state performance of MAPbBr3 solar cells. (C) 2016 Author(s).

引用

页数：8

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