Improved Crystallization of Perovskite Films by Optimized Solvent Annealing for High Efficiency Solar Cell

被引：259

作者：

Liu, Jiang ^{[1
]}

Gao, Cheng ^{[1
,2
]}

He, Xulin ^{[1
]}

Ye, Qinyan ^{[1
]}

Ouyang, Liangqi ^{[3
]}

Zhuang, Daming ^{[3
]}

Liao, Cheng ^{[1
]}

Mei, Jun ^{[1
]}

Lau, Woonming ^{[1
]}

机构：

[1] China Acad Engn Phys, Chengdu Dev Ctr Sci & Technol, Chengdu Green Energy & Green Mfg Technol R&D Ctr, Chengdu 610207, Peoples R China

[2] Univ Elect Sci & Technol, Sch Optoelect Informat, Chengdu 610054, Peoples R China

[3] Tsinghua Univ, Sch Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

ACS APPLIED MATERIALS & INTERFACES | 2015年 / 7卷 / 43期

关键词：

organic lead iodide; solvent annealing; crystallization; film growth; solar cell; PCBM; HALIDE PEROVSKITES; LOW-TEMPERATURE; LIGHT; PASSIVATION; HYSTERESIS; LENGTHS; GROWTH;

D O I：

10.1021/acsami.5b06780

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Organic inorganic halide perovsldte-based thin film solar cells show excellent light-to-power conversion efficiency. The high performance for the devices requires the preparation of well-crystallized perovskite absorbers. In this paper, we used the postannealing process to treat the perovskite films under different solvent vapors and observed that the solvent vapors have a strong effect on the film growth. A model regarding the perovskite film growth was proposed as well. Intensive characterizations including scanning electron microscopy, electrochemical impedance spectroscopy, and admittance spectroscopy allowed us to attribute the improved performance to reduced recombination loss and defect density. Solar cell based on the DMSO-treated films delivered a power conversion efficiency of over 13% with negligible photocurrent hysteresis.

引用

页码：24008 / 24015

页数：8

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