气候变化领域集成服务门户(CCPortal): An in-situ defect passivation through a green anti-solvent approach for high-efficiency and stable perovskite solar cells

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DOI	10.1016/j.scib.2021.03.018
	An in-situ defect passivation through a green anti-solvent approach for high-efficiency and stable perovskite solar cells
	Liu C.; Huang L.; Zhou X.; Wang X.; Yao J.; Liu Z.; Liu S.F.; Ma W.; Xu B.
发表日期	2021
ISSN	20959273
起始页码	1419
结束页码	1428
卷号	66 期号:14
英文摘要	Surface and grain boundary defects in halide perovskite solar cells are highly detrimental, reducing efficiencies and stabilities. Widespread halide anion and organic cation defects usually aggravate ion diffusion and material degradation on the surfaces and at the grain boundaries of perovskite films. In this study, we employ an in-situ green method utilizing nontoxic cetyltrimethylammonium chloride (CTAC) and isopropanol (IPA) as anti-solvents to effectively passivate both surface and grain boundary defects in hybrid perovskites. Anion vacancies can be readily passivated by the chloride group due to its high electronegativity, and cation defects can be synchronously passivated by the more stable cetyltrimethylammonium group. The results show that the charge trap density was significantly reduced, while the carrier recombination lifetime was markedly extended. As a result, the power conversion efficiency of the cell can reach 23.4% with this in-situ green method. In addition, the device retains 85% of its original power conversion efficiency after 600 h of operation under illumination, showing that the stability of perovskite solar cells is improved with this in-situ passivation strategy. This work may provide a green and effective route to improve both the stability and efficiency of perovskite solar cells. © 2021 Science China Press
关键词	Green anti-solvent In-situ defect passivation Perovskite solar cells
英文关键词	Chemical bonds; Chlorine compounds; Conversion efficiency; Efficiency; Electronegativity; Grain boundaries; Passivation; Perovskite; Positive ions; Solvents; Anti-solvents; Cation defects; Cell-be; Cell/B.E; Cell/BE; Grain-boundary defects; Green anti-solvent; Green method; In-situ defect passivation; Surface boundaries; Perovskite solar cells
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207485
作者单位	Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, 518055, China; Department of Materials Science and Engineering and Shenzhen Engineering Research and Development Center for Flexible Solar Cells, Southern University of Science and Technology, Shenzhen, 518055, China; Key Laboratory of Energy Conversion and Storage Technologies (Southern University of Science and Technology), Ministry of Education, Shenzhen, 518055, China; Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices, Southern University of Science and Technology, Shenzhen, 518055, China; State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, North China Electric Power University, Beijing, 102206, China; Key Laboratory of Applied Surface and Colloid Chemistry (Ministry of Education), Shaanxi Key Laboratory for Advanced Energy Devices, Shaanxi Engineering Laborartory for Advanced Energy Technology, School of Mat...
推荐引用方式 GB/T 7714	Liu C.,Huang L.,Zhou X.,et al. An in-situ defect passivation through a green anti-solvent approach for high-efficiency and stable perovskite solar cells[J],2021,66(14).
APA	Liu C..,Huang L..,Zhou X..,Wang X..,Yao J..,...&Xu B..(2021).An in-situ defect passivation through a green anti-solvent approach for high-efficiency and stable perovskite solar cells.Science Bulletin,66(14).
MLA	Liu C.,et al."An in-situ defect passivation through a green anti-solvent approach for high-efficiency and stable perovskite solar cells".Science Bulletin 66.14(2021).