Volume 41, Issue 1 pp. 43-49
Concise Report

Targeted Management of Perovskite Film by Co(II) Sulfophenyl Porphyrin for Efficient and Stable Solar Cells

Xiao-Xia Feng

Xiao-Xia Feng

State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000 China

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Xudong Lv

Xudong Lv

State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000 China

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Jing Cao

Corresponding Author

Jing Cao

State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000 China

E-mail: [email protected]; [email protected]Search for more papers by this author
Yu Tang

Corresponding Author

Yu Tang

State Key Laboratory of Applied Organic Chemistry, Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou, Gansu, 730000 China

E-mail: [email protected]; [email protected]Search for more papers by this author
First published: 19 September 2022
Citations: 4

Dedicated to the 120th Anniversary of Northwest Normal University.

Comprehensive Summary

In the lead halide perovskite solar cells (PSCs), the redox reaction of I and Pb2+ ions in perovskite materials under the fabrication and operation processes causes the formation of defects to destroy the cell efficiency and long-term stability. Herein, we have employed a Co(II) sulfophenyl porphyrin (CoTPPS) to modify the perovskite film. The sulfonic group could coordinate with Pb2+ to efficiently passivate the uncoordinated Pb2+. Additionally, Co2+ ions in CoTPPS could react with I2 generated under the thermal and light stress to yield the Co3+ and I, thus achieving the regeneration of I in perovskite film. Therefore, the CoTPPS could realize the targeted management of the imperfections in perovskite film. As a result, the modified PSCs reveal the remarkably enhanced cell performance. More importantly, the CoTPPS modified device retains 75% of its initial efficiency value storing at 85°C for 2000 h and about 70% of its efficiency when being continuously illuminated at a simulated sunlight for 1200 h. This strategy tackles the chemical reaction and inhibits the defect generation, thus improving the operational stability and efficiency of PSCs. image

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