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Vol. 15 (2023)

Crystallization and Orientation Modulation Enable Highly Efficient Doctor-Bladed Perovskite Solar Cells

https://doi.org/10.1007/s40820-023-01138-x
Jianhui Chang
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, People’s Republic of China
Erming Feng
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, People’s Republic of China
Hengyue Li
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, People’s Republic of China
Yang Ding
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, People’s Republic of China
Caoyu Long
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, People’s Republic of China
Yuanji Gao
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, People’s Republic of China
Yingguo Yang
Shanghai Synchrotron Radiation Facility (SSRF), Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201204, People’s Republic of China
Chenyi Yi
Department of Electrical Engineering, Tsinghua University, Beijing 100084, People’s Republic of China
Zijian Zheng
Department of Applied Biology and Chemical Technology, Faculty of Science, The Hong Kong Polytechnic University, Hong Kong 999077, People’s Republic of China
Junliang Yang
Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha 410083, Hunan, People’s Republic of China

Corresponding Author: Junliang Yang

junliang.yang@csu.edu.cn

Nano-Micro Letters, Vol. 15 (2023), Article Number: 164

Abstract

With the rapid rise in perovskite solar cells (PSCs) performance, it is imperative to develop scalable fabrication techniques to accelerate potential commercialization. However, the power conversion efficiencies (PCEs) of PSCs fabricated via scalable two-step sequential deposition lag far behind the state-of-the-art spin-coated ones. Herein, the additive methylammonium chloride (MACl) is introduced to modulate the crystallization and orientation of a two-step sequential doctor-bladed perovskite film in ambient conditions. MACl can significantly improve perovskite film quality and increase grain size and crystallinity, thus decreasing trap density and suppressing nonradiative recombination. Meanwhile, MACl also promotes the preferred face-up orientation of the (100) plane of perovskite film, which is more conducive to the transport and collection of carriers, thereby significantly improving the fill factor. As a result, a champion PCE of 23.14% and excellent long-term stability are achieved for PSCs based on the structure of ITO/SnO2/FA1-xMAxPb(I1-yBry)3/Spiro-OMeTAD/Ag. The superior PCEs of 21.20% and 17.54% are achieved for 1.03 cm2 PSC and 10.93 cm2 mini-module, respectively. These results represent substantial progress in large-scale two-step sequential deposition of high-performance PSCs for practical applications.


Highlights:


1 High quality and strongly oriented perovskite films are prepared by two step doctor blading in air.
2 Methylammonium chloride induced low dimensional intermediate phase regulates the crystallization and orientation of the perovskite.
3 Two step doctor bladed perovskite solar cells achieve a power conversion efficiency (PCE) of 23.14%, while 1.03 cm2 PSCs and 10.93 cm2 mini modules achieve PCEs of 21.20% and 17.54%, respectively.

Keywords

Crystallization regulation Orientation modulation Perovskite solar cells Doctor-blading Ambient condition
Chang, Jianhui, Erming Feng, Hengyue Li, Yang Ding, Caoyu Long, Yuanji Gao, Yingguo Yang, Chenyi Yi, Zijian Zheng, and Junliang Yang. 2023. “Crystallization and Orientation Modulation Enable Highly Efficient Doctor-Bladed Perovskite Solar Cells”. Nano-Micro Letters 15 (June):164. https://doi.org/10.1007/s40820-023-01138-x.
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