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journal article·2023-10Open access

Bifunctional trifluorophenylacetic acid additive for stable and highly efficient flexible perovskite solar cell

Yang Cao, Jiangshan Feng, Zhuo Xu, Lu Zhang, Junjie Lou, Yucheng Liu, Xiaodong Ren, Dong Yang, Shengzhong (Frank) Liu

InfoMat· Volume 5· Issue 10
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Source abstract

Abstract

Abstract The defects within perovskite films are the fatal roadblock limiting the performance of perovskite solar cells (PSCs). Herein, we develop a patching strategy to obtain high‐quality perovskite film using bifunctional trifluorophenylacetic acid (TFPA). Theoretical calculation and experiments reveal that the –COOH groups in TFPA effectively passivate the deep‐energy‐level defects of perovskite by combining with Pb clusters on the perovskite grain surfaces to enhance the efficiency of PSCs, and hydrophobic benzene groups containing fluorine in TFPA are exposed to improve the stability of PSCs. The power conversion efficiency (PCE) of PSCs with TFPA is enhanced from 22.95% to 24.56%. Most importantly, we successfully fabricated flexible PSCs using TFPA with the high PCE of 22.65%. The devices with TFPA maintain 93.22% of the initial efficiency MPP under continuous irradiation for 10.5 h, while the devices without TFPA only retain 82.22% of the initial efficiency under the same conditions for just 5 h. Meanwhile, the unsealed devices with TFPA hold 93.59% of the initial efficiency when stored in air for 3912 h. image
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Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Conducting polymers and applications

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

Affiliations

Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education School of Materials Science and Engineering, Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Lab for Advanced Energy Technology, Institute for Advanced Energy Materials, Shaanxi Normal University Xi'an Shaanxi the People's Republic of China

Institute of Nanoscience and Nanotechnology, School of Materials and Energy, Lanzhou University Lanzhou Gansu the People's Republic of China

Dalian National Laboratory for Clean Energy iChEM, Dalian Institute of Chemical Physics, Chinese Academy of Sciences Dalian the People's Republic of China

University of Chinese Academy of Sciences Beijing the People's Republic of China

Funding

Higher Education Discipline Innovation Project · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Shanxi Provincial Science and Technology Department

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