DataVXACS Applied Materials & InterfacesPaper
journal article·2022-09-28

Improving the Air Resistance of the Precursor Solution for Ambient-Air Coating of an Sn–Pb Perovskite Film with Superior Photovoltaic Performance

Shaoshen Lv, Weiyin Gao, Gang Xing, Lingfeng Chao, Lin Song, Mingjie Li, Li Fu, Yonghua Chen, Chenxin Ran

ACS Applied Materials & Interfaces· Volume 14· Issue 38
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Source abstract

Abstract

Owing to narrow band gap and low toxicity, tin–lead (Sn–Pb) hybrid perovskites have shown great potential in photovoltaic applications, and the highest power conversion efficiency (PCE) of Sn–Pb perovskite solar cells (PSCs) has recently reached 23.6%. However, it is still challenging to prepare Sn–Pb films in open-air condition due to the Sn2+ oxidation of the precursor solution under this condition. In this work, we report the stabilizing of the Sn–Pb perovskite precursor solution by using ionic liquid methylammonium acetate (MAAc) as the solvent, which enables the fabrication of Sn–Pb films in air. MAAc is found to coordinate with the Sn–Pb precursor via abundant hydrogen bonding, which stabilizes the colloids and protects the Sn2+ stability in the precursor solution in air. Therefore, the durability of the Sn–Pb precursor solution based on the MAAc solvent is greatly improved, which enables the fabrication of efficient PSCs and achieves a champion PCE of ∼16% with robust device stability. Moreover, due to the chemical interactions of MAAc with Sn–Pb perovskites, the Pb leakage is also suppressed in the MAAc-based Sn–Pb PSCs. This work demonstrates a feasible strategy for reliable fabrication of Sn–Pb PSCs, which could also be applied in many other optoelectronic devices.
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications · Organic Electronics and Photovoltaics

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Frontiers Science Center for Flexible Electronics, Xi’an Institute of Flexible Electronics (IFE) and Xi’an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, Xi’an 710072, China

Department of Applied Physics, The Hong Kong Polytechnic University, Kowloon 999077, Hong Kong, China

Shenzhen Research Institute, The Hong Kong Polytechnic University, Shenzhen 518057, Guangdong, China

School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China

Key Laboratory of Flexible Electronics (KLOFE) & Institution of Advanced Materials (IAM), Nanjing Tech University (NanjingTech), Nanjing 211816, Jiangsu, China

Funding

China Postdoctoral Science Foundation · Natural Science Foundation of Jiangsu Province · Central University Basic Research Fund of China · National Natural Science Foundation of China · Wuhan National Laboratory for Optoelectronics · Northwestern Polytechnical University · Young 1000 Talents Global Recruitment Program of China · Optics Valley Laboratory · Shaanxi Province

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