Improved performance of CH3NH3PbBr3 perovskite solar cells utilizing PbI2 precursors

被引：4

作者：

Yang, Yang ^{[1
]}

Zhang, Taiyang ^{[2
]}

Tian, Hongxiang ^{[1
]}

Zhao, Zhiguo ^{[1
]}

Qin, Xiaojun ^{[1
]}

Wu, Junbo ^{[1
]}

机构：

[1] Clean Energy Res Inst, China Huaneng Grp, Beijing 102209, Peoples R China

[2] Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China

来源：

CHEMICAL PHYSICS LETTERS | 2017年 / 687卷

关键词：

Perovskite; Solar cell; Precursor; Anion exchange; CH3NH3PbBr3; LEAD BROMIDE PEROVSKITE; DETAILED BALANCE LIMIT; HALIDE PEROVSKITES; SINGLE JUNCTION; CATION-EXCHANGE; EFFICIENT; IODIDE; CRYSTALLIZATION; TRANSFORMATION; FABRICATION;

D O I：

10.1016/j.cplett.2017.09.013

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：

High-quality CH3NH3PbBr3 films have been made utilizing the PbI2 precursor via a two-step sequential deposition method. The use of the PbI2 precursor has significantly improved the film quality. UV-Vis results show that the PbI2 precursor leads to moderately enhanced absorptions. XRD and SEM characterizations suggest that compact and uniform films with large grain sizes and high crystallinity can be obtained utilizing PbI2. The power conversion efficiency of the FTO/compact-TiO2/MAPbBr(3)/Spiro-OMeTAD/Ag device increased from 5.3% to 7.6% after changing the PbBr2 precursor to PbI2. The reaction between PbI2 and excess MABr generated MAPbBr(3) through halide anion exchange. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：106 / 109

页数：4

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