Band-gap tuning of lead halide perovskites using a sequential deposition process

被引：537

作者：

Kulkarni, Sneha A. ^{[1
]}

Baikie, Tom ^{[1
]}

Boix, Pablo P. ^{[1
]}

Yantara, Natalia ^{[1
]}

Mathews, Nripan ^{[1
,2
,3
]}

Mhaisalkar, Subodh ^{[1
,2
]}

机构：

[1] Energy Res Inst Nanyang Technol Univ NTU ERI N, Singapore 637553, Singapore

[2] Nanyang Technol Univ, Sch Mat Sci & Engn, Singapore 639798, Singapore

[3] Singapore Berkeley Res Initiat Sustainable Energ, Singapore 138602, Singapore

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2014年 / 2卷 / 24期

基金：

新加坡国家研究基金会;

关键词：

LOW-TEMPERATURE; SOLAR-CELLS; EFFICIENT; TRANSPORT; ROUTE;

D O I：

10.1039/c4ta00435c

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：

Band-gap tuning of mixed anion lead halide perovskites (MAPb(I1-xBrx)(2) (0 <= x <= 1)) has been demonstrated by means of a sequential deposition process. The optical properties of perovskite hybrids can be flexibly modified by changing (mixing) the concentration of halogen precursors. The concentrations of precursor solution as well as the conversion time play an important role in determining the band-gap of perovskites. A systematic shift of the absorption band edge to shorter wavelengths is observed with increasing Br content in the perovskite films, which results in the decrement of the photocurrent. Nanorod like morphological features are also observed for perovskite films with an iodide to bromide molar ratio of <0.7.

引用

页码：9221 / 9225

页数：5

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