Open Access

ARTICLE

Grain Boundary Passivation Modulated by Molecular Doping for High-Performance Perovskite Solar Cells

by Yangyang Hao, Yue Liu^*, Guorui Cao^*

College of Chemical and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China

* Corresponding Authors: Guorui Cao. Email: ; Yue Liu. Email:

(This article belongs to the Special Issue: Perovskite Solar Cells)

Journal of Renewable Materials 2022, 10(12), 3505-3519. https://doi.org/10.32604/jrm.2022.023122

Received 11 April 2022; Accepted 12 May 2022; Issue published 14 July 2022

Abstract

Aiming to reduce the defects of perovskite film and improve carrier transport, an organic small molecule, benzo [d]isothiazol-3(2H)-one 1,1-dioxide (OBS), is introduced as an additive in the solution-processing of perovskite and prepare uniform perovskite films with a continuous distribution of OBS at grain boundaries. Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy are conducted to reveal the interactions of hydrogen bonding and coordination bonding between OBS and perovskite. Various characterizations (including X-ray diffraction, UV-vis spectroscopy, electrochemical impedance spectroscopy, etc.) are conducted to uncover the effect of OBS on device performance. Consequently, high efficiency of 23.26% is obtained for the OBS-treated device, while the control device shows only a companion efficiency of 21.60%.

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