Large-area, high-quality organic–inorganic hybrid perovskite thin films via a controlled vapor–solid reaction

Xiaomin Chen; Huanqi Cao; Hao Yu; Hao Zhu; Huanping Zhou; Liying Yang; Shougen Yin

doi:10.1039/C6TA03180C

Large-area, high-quality organic–inorganic hybrid perovskite thin films via a controlled vapor–solid reaction†

Xiaomin Chen,^ab Huanqi Cao,*^ab Hao Yu,^ab Hao Zhu,^ab Huanping Zhou,*^c Liying Yang^ab and Shougen Yin*^ab

* Corresponding authors

^a Key Laboratory of Display Materials and Photoelectric Devices (Ministry of Education), School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China
E-mail: caoh@tjut.edu.cn, sgyin@tjut.edu.cn

^b Tianjin Key Laboratory for Photoelectric Materials and Devices, School of Materials Science and Engineering, Tianjin University of Technology, Tianjin 300384, China

^c Department of Materials Science and Engineering, College of Engineering, Peking University, China
E-mail: happy_zhou@pku.edu.cn

Abstract

A new vapor–solid reaction (VSR) method is demonstrated, in which two parallel hot plates were used to synthesize high-quality organic–inorganic hybrid perovskite thin films over an area of 8 × 8 cm². We first probed the VSR process in detail, and found side reactions between methylammonium iodide (MAI) vapor and lead iodide (PbI₂) occurring, which could be largely suppressed by inserting a PEDOT:PSS layer beneath. Furthermore, we employed an in situ resistance measurement method to monitor the evolution of perovskite thin films, which provided valuable insights for precise control of film growth. Inverted planar perovskite solar cells with a decent efficiency of 12.2% have been achieved. Our work provides not only a strategy to fabricate high-quality perovskite thin films over a large area, but also a reliable way to optimize the reaction parameters of perovskite. In addition, our finding reveals that both the precise control of the ratio of MAI to PbI₂ and the proper choice of substrates are decisive for achieving high-performance devices during the VSR process.

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DOI: https://doi.org/10.1039/C6TA03180C
Article type: Paper
Submitted: 17 Apr 2016
Accepted: 30 Apr 2016
First published: 03 May 2016

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J. Mater. Chem. A, 2016,4, 9124-9132

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Large-area, high-quality organic–inorganic hybrid perovskite thin films via a controlled vapor–solid reaction

X. Chen, H. Cao, H. Yu, H. Zhu, H. Zhou, L. Yang and S. Yin, J. Mater. Chem. A, 2016, 4, 9124 DOI: 10.1039/C6TA03180C

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Journal of Materials Chemistry A

Large-area, high-quality organic–inorganic hybrid perovskite thin films via a controlled vapor–solid reaction†

Abstract

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Large-area, high-quality organic–inorganic hybrid perovskite thin films via a controlled vapor–solid reaction

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