Improving efficiency of n-i-p perovskite solar cells enabled by 3-carboxyphenylboronic acid additive

doi:10.1088/1674-1056/ace1d8

Abstract In the past period of time, perovskite solar cells have gained tremendous developments in improving photovoltaic performance, but they still face severe challenges. Defects in perovskite layers, especially at grain boundaries, severely limit the stabilization and efficiency of solar cells. In this work, we adopt 3-carboxyphenylboronic acid (CPBA) for modifying defects in perovskite thin films. Through the interaction among the carboxyl group, boronic acid and lead ions in the perovskite film, the crystallization effect of the perovskite molecular is greatly optimized. Moreover, the film defects are spontaneously passivated and the band gap is reduced, increasing the open circuit voltage and fill factor. Therefore, power conversion efficiency has been increased from 17.25% to 20.20%. This discovery provides a potential strategy for passivating the trap states in perovskite and enhancing the properties of devices.

Keywords: passivation defects 3-carboxyphenylboronic acid perovskite solar cells

Received: 27 April 2023
Revised: 15 June 2023
Accepted manuscript online: 27 June 2023

PACS:	78.56.-a	(Photoconduction and photovoltaic effects)
	88.40.hj	(Efficiency and performance of solar cells)
	73.61.-r	(Electrical properties of specific thin films)
	61.72.-y	(Defects and impurities in crystals; microstructure)

Fund: Project supported by the Regional Joint Fund of the National Science Foundation of China (Grant No. U21A20492), and the Sichuan Science and Technology Program (Grant Nos. 2022YFH0081, 2022YFG0012, and 2022YFG0013). This work was also sponsored by the Sichuan Province Key Laboratory of Display Science and Technology, and Qiantang Science & Technology Innovation Center.

Corresponding Authors: Jun-Sheng Yu
E-mail: jsyu@uestc.edu.cn

Cite this article:

Bin-Jie Li(李斌杰), Jia-Wen Li(李嘉文), Gen-Jie Yang(杨根杰), Meng-Ge Wu(吴梦鸽), and Jun-Sheng Yu(于军胜) Improving efficiency of n-i-p perovskite solar cells enabled by 3-carboxyphenylboronic acid additive 2023 Chin. Phys. B 32 107801

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Improving efficiency of n-i-p perovskite solar cells enabled by 3-carboxyphenylboronic acid additive

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