Highly efficient flexible perovskite solar cells with vacuum-assisted low-temperature annealed SnO2 electron transport layer

被引：53

作者：

Li, Xiaoguo ^{[1
]}

Shi, Zejiao ^{[1
]}

Behrouznejad, Fatemeh ^{[1
]}

Hatamvand, Mohammad ^{[1
]}

Zhang, Xin ^{[2
]}

Wang, Yaxin ^{[2
]}

Liu, Fengcai ^{[1
]}

Wang, Haoliang ^{[1
]}

Liu, Kai ^{[1
]}

Dong, Hongliang ^{[3
]}

Mudasar, Farhan ^{[1
]}

Wang, Jiao ^{[1
]}

Yu, Anran ^{[1
]}

Zhan, Yiqiang ^{[1
]}

机构：

[1] Fudan Univ, Ctr Micro Nano Syst, Sch Informat Sci & Technol SIST, Shanghai 200433, Peoples R China

[2] Fudan Univ, Acad Engn & Technol, Shanghai 200433, Peoples R China

[3] Ctr High Pressure Sci & Technol Adv Res, Shanghai 201203, Peoples R China

来源：

JOURNAL OF ENERGY CHEMISTRY | 2022年 / 67卷

基金：

中国国家自然科学基金;

关键词：

Flexible perovskite solar cells; Vacuum-assisted; Electron transport layer; Trap-assisted recombination; THIN-FILMS; PASSIVATION; OXIDE;

D O I：

10.1016/j.jechem.2021.09.021

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

The demand for lightweight, flexible, and high-performance portable power sources urgently requires high-efficiency and stable flexible solar cells. In the case of perovskite solar cells (PSCs), most of the common electron transport layer (ETL) needs to be annealed for improving the optoelectronic properties, while conventional flexible substrates could barely stand the high temperature. Herein, a vacuum-assisted annealing SnO2 ETL at low temperature (100 degrees C) is utilized in flexible PSCs and achieved high efficiency of 20.14%. Meanwhile, the open-circuit voltage (V-oc) increases from 1.07 V to 1.14 V. The flexible PSCs also show robust bending stability with 86.8% of the initial efficiency is retained after 1000 bending cycles at a bending radius of 5 mm. X-ray photoelectron spectroscopy (XPS), atomic force microscopy (AFM), and contact angle measurements show that the density of oxygen vacancies, the surface roughness of the SnO2 layer, and film hydrophobicity are significantly increased, respectively. These improvements could be due to the oxygen-deficient environment in a vacuum chamber, and the rapid evaporation of solvents. The proposed vacuum-assisted low-temperature annealing method not only improves the efficiency of flexible PSCs but is also compatible and promising in the large-scale commercialization of flexible PSCs. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by ELSEVIER B.V. and Science Press. All rights reserved.

引用

页码：1 / 7

页数：7

共 46 条

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