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Open AccessArticle

GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate

1
College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China
2
Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610065, China
3
Engineering Research Center of Alternative Energy Materials & Devices, Ministry of Education, Chengdu 610065, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Jung-Ho Yun
Nanomaterials 2021, 11(3), 750; https://doi.org/10.3390/nano11030750
Received: 1 February 2021 / Revised: 11 March 2021 / Accepted: 11 March 2021 / Published: 16 March 2021
Perovskite solar cells have exhibited astonishing photoelectric conversion efficiency and have shown a promising future owing to the tunable content and outstanding optoelectrical property of hybrid perovskite. However, the devices with planar architecture still suffer from huge Voc loss and severe hysteresis effect. In this research, Guanidine hydrobromide (GABr) post-treatment is carried out to enhance the performance of MAPbI3 n-i-p planar perovskite solar cells. The detailed characterization of perovskite suggests that GABr post-treatment results in a smoother absorber layer, an obvious reduction of trap states and optimized energy level alignment. By utilizing GABr post-treatment, the Voc loss is reduced, and the hysteresis effect is alleviated effectively in MAPbI3 solar cells. As a result, solar cells based on glass substrate with efficiency exceeding 20%, Voc of 1.13 V and significantly mitigated hysteresis are fabricated successfully. Significantly, we also demonstrate the effectiveness of GABr post-treatment in flexible device, whose efficiency is enhanced from 15.77% to 17.57% mainly due to the elimination of Voc loss. View Full-Text
Keywords: nonradiative recombination; post-treatment; flexible perovskite solar cell nonradiative recombination; post-treatment; flexible perovskite solar cell
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MDPI and ACS Style

Chen, T.; He, R.; Zhang, F.; Hao, X.; Xuan, Z.; Wang, Y.; Wang, W.; Zhao, D.; Zhang, J.; Wu, L. GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate. Nanomaterials 2021, 11, 750. https://doi.org/10.3390/nano11030750

AMA Style

Chen T, He R, Zhang F, Hao X, Xuan Z, Wang Y, Wang W, Zhao D, Zhang J, Wu L. GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate. Nanomaterials. 2021; 11(3):750. https://doi.org/10.3390/nano11030750

Chicago/Turabian Style

Chen, Tingting; He, Rui; Zhang, Fan; Hao, Xia; Xuan, Zhipeng; Wang, Yunfan; Wang, Wenwu; Zhao, Dewei; Zhang, Jingquan; Wu, Lili. 2021. "GABr Post-Treatment for High-Performance MAPbI3 Solar Cells on Rigid Glass and Flexible Substrate" Nanomaterials 11, no. 3: 750. https://doi.org/10.3390/nano11030750

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