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Deep surface passivation for efficient and hydrophobic perovskite solar cells
Xia,Junmin; Liang,Chao; Mei,Shiliang; Gu,Hao; He,Bingchen; Zhang,Zhipeng; Liu,Tanghao; Wang,Kaiyang; Wang,Sisi; Chen,Shi; Cai,Yongqing; Xing,Guichuan
2021-02-07
Source PublicationJournal of Materials Chemistry A
ISSN2050-7488
Volume9Issue:5Pages:2919-2927
AbstractDefect passivation has developed as an attractive approach to promote the performance of perovskite solar cells. However, robust control of the interplay between the defects and adsorbates is challenging and critical for applications. Here, hydrophobic 3-(trifluoromethyl) phenethylamine hydroiodide (CFPEAI) is introduced on the surface of perovskite films. By controlling the post-treatment of the passivation layers, the amphipathic passivation agent CFPEAI can form 2D perovskite and go deeply into the films (>30 nm), which can further passivate the internal defects and improve the long-term stability of perovskite films. Furthermore, the CFPEAI 2D passivated perovskite films exhibit better energy level alignment, lower surface roughness, longer carrier lifetimes, lower trap state density, and higher stability than the control and the ones without annealing. Our first-principles simulation reveals that CFPEAI effectively renormalizes the defective states of the vacancies with benign characteristics. The defect-adsorbate complex facilitates the manipulation of versatile electronic states for a prolonged lifetime of photoexcited carriers with improved structural integrity. Perovskite solar cells' performance is enhanced from 18.87% to 21.05% along with improved stability, which can retain 98% of initial performance after 528 h in ambient air with a humidity of 70-80%.
DOI10.1039/d0ta10535j
URLView the original
Language英语
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Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorCai,Yongqing
AffiliationJoint Key Laboratory of the Ministry of Education,Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade,Taipa,999078,Macao
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Xia,Junmin,Liang,Chao,Mei,Shiliang,et al. Deep surface passivation for efficient and hydrophobic perovskite solar cells[J]. Journal of Materials Chemistry A,2021,9(5):2919-2927.
APA Xia,Junmin,Liang,Chao,Mei,Shiliang,Gu,Hao,He,Bingchen,Zhang,Zhipeng,Liu,Tanghao,Wang,Kaiyang,Wang,Sisi,Chen,Shi,Cai,Yongqing,&Xing,Guichuan.(2021).Deep surface passivation for efficient and hydrophobic perovskite solar cells.Journal of Materials Chemistry A,9(5),2919-2927.
MLA Xia,Junmin,et al."Deep surface passivation for efficient and hydrophobic perovskite solar cells".Journal of Materials Chemistry A 9.5(2021):2919-2927.
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