Cesium Lead Halide Perovskites with Improved Stability for Tandem Solar Cells

被引：1021

作者：

Beal, Rachel E. ^{[1
]}

Slotcavage, Daniel J. ^{[1
]}

Leijtens, Tomas ^{[1
]}

Bowring, Andrea R. ^{[1
]}

Belisle, Rebecca A. ^{[1
]}

Nguyen, William H. ^{[1
]}

Burkhard, George F. ^{[1
]}

Hoke, Eric T. ^{[1
]}

McGehee, Michael D. ^{[1
]}

机构：

[1] Stanford Univ, Moore Mat Res Lab, 466 Lomita Mall, Palo Alto, CA 94305 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2016年 / 7卷 / 05期

基金：

美国国家科学基金会;

关键词：

PHASE-TRANSITIONS; EFFICIENT; NANOCRYSTALS; ELECTRODE; ABSORBER; CSPBBR3; BR;

D O I：

10.1021/acs.jpclett.6b00002

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A semiconductor that can be processed on a large scale with a bandgap around 1.8 eV could enable the manufacture of highly efficient low cost double-junction solar cells on crystalline Si. Solution-processable organicinorganic halide perovskites have recently generated considerable excitement as absorbers in single-junction solar cells, and though it is possible to tune the bandgap of (CH3NH3)Pb(BrxI1x)(3) between 2.3 and 1.6 eV by controlling the halide concentration, optical instability due to photoinduced phase segregation limits the voltage that can be extracted from compositions with appropriate bandgaps for tandem applications. Moreover, these materials have been shown to suffer from thermal degradation at temperatures within the processing and operational window. By replacing the volatile methylammonium cation with cesium, it is possible to synthesize a mixed halide absorber material with improved optical and thermal stability, a stabilized photoconversion efficiency of 6.5%, and a bandgap of 1.9 eV.

引用

页码：746 / 751

页数：6

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