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Vol. 10 No. 3 (2018)

Low-Temperature Soft-Cover-Assisted Hydrolysis Deposition of Large-Scale TiO2 Layer for Efficient Perovskite Solar Modules

https://doi.org/10.1007/s40820-018-0203-7
Jinjin He
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People’s Republic of China
Enbing Bi
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People’s Republic of China
Wentao Tang
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People’s Republic of China
Yanbo Wang
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People’s Republic of China
Xudong Yang
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People’s Republic of China
Han Chen
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People’s Republic of China
Liyuan Han
State Key Laboratory of Metal Matrix Composites, School of Material Science and Engineering, Shanghai Jiao Tong University, 800 Dong Chuan Road, Shanghai 200240, People’s Republic of China

Corresponding Author: Liyuan Han

han.liyuan@sjtu.edu.cn

Nano-Micro Letters, Vol. 10 No. 3 (2018), Article Number: 49

Abstract

Perovskite solar cells with TiO2 electron transport layers exhibit power conversion efficiency (PCE) as high as 22.7% in single cells. However, the preparation process of the TiO2 layer is adopted by an unscalable method or requires high-temperature sintering, which precludes its potential use for mass production of flexible devices. In this study, a scalable low-temperature soft-cover-assisted hydrolysis (SAH) method is presented, where the precursor solution is sandwiched between a soft cover and preheated substrate to form a closed hydrolysis environment. Compact homogeneous TiO2 films with a needle-like structure were obtained after the hydrolysis of a TiCl4 aqueous solution. Moreover, by careful optimization of the TiO2 fabrication conditions, a high PCE of 14.01% could be achieved for a solar module (4 × 4 cm2) prepared using the SAH method. This method provides a novel approach for the efficient scale-up of the low-temperature TiO2 film growth for industrial applications.


Highlights:


1 A simple soft-cover-assisted hydrolysis method to prepare TiO2 films at a low temperature is proposed.
2 Compact homogeneous large-area TiO2 films with a needle-like morphology were obtained.
3 A solar module fabricated with as-prepared TiO2 films as electron transfer layers exhibited a power conversion efficiency of 14.01%.

Keywords

Low-temperature TiO2 Large-scale Soft-cover-assisted hydrolysis deposition Perovskite solar cell
He, Jinjin, Enbing Bi, Wentao Tang, Yanbo Wang, Xudong Yang, Han Chen, and Liyuan Han. 2018. “Low-Temperature Soft-Cover-Assisted Hydrolysis Deposition of Large-Scale TiO2 Layer for Efficient Perovskite Solar Modules”. Nano-Micro Letters 10 (3):49. https://doi.org/10.1007/s40820-018-0203-7.
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