Morphology modification of perovskite film by a simple post-treatment process in perovskite solar cell

被引：48

作者：

Song, J. ^{[1
]}

Yang, Y. ^{[1
]}

Zhao, Y. L. ^{[1
]}

Che, M. ^{[1
]}

Zhu, L. ^{[1
]}

Gu, X. Q. ^{[1
]}

Qiang, Y. H. ^{[1
]}

机构：

[1] China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2017年 / 217卷

关键词：

Perovskite solar cells; Film morphology; Solvent post-treatment; PLANAR CH3NH3PBI3 PEROVSKITE; POWER CONVERSION EFFICIENCY; ACID-BASE ADDUCT; SEQUENTIAL DEPOSITION; HALIDE PEROVSKITES; PERFORMANCE; FABRICATION; GROWTH; CRYSTALLIZATION; ROUTE;

D O I：

10.1016/j.mseb.2017.01.004

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A homogenous perovskite thin film with high coverage is a determining factor for high performance perovskite solar cells. Unlike previous pre-treatments aiming at perovskite precursor, we proposed a simple method to modify the morphology of perovskite films by post-treatment process using mixed solvents of N,N-dimethylformamide (DMF), dimethyl sulfoxide (DMSO), or 1,4-butyrolactone (GBL) with chlorobenzene (CBZ) in this paper. As good solvent of perovskite, DMF, DMSO, and GBL could dissolve the formed perovskite film. Meanwhile, CBZ, anti-solvent of perovskite film, could decrease the dissolving capacity of these good solvents. Therefore, the perovskite film coverage might be improved by the partial dissolution and recrystallization after solvent post-treatment process. Electrochemical impedance spectrometry (EIS) and time-resolved photoluminescence (TRPL) indicated that this post-treatment process could enhance charge transfer at TiO2/perovskite interface. Finally, the conversion efficiency increased from 10.10% to 11.82%, 11.68%, and 10.66% using perovskite films post-treated by DMF/CBZ, DMSO/CBZ, and GBL/CBZ blend solvents, respectively. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：18 / 25

页数：8

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