globalchange  > 气候变化与战略
DOI: 10.1016/j.scib.2021.03.018
论文题名:
An in-situ defect passivation through a green anti-solvent approach for high-efficiency and stable perovskite solar cells
作者: Liu C.; Huang L.; Zhou X.; Wang X.; Yao J.; Liu Z.; Liu S.F.; Ma W.; Xu B.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2021
卷: 66, 期:14
起始页码: 1419
结束页码: 1428
语种: 英语
中文关键词: 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
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
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170329
Appears in Collections:气候变化与战略

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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 Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China; Institute of Functional Nano & Soft Materials, Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Joint International Research Laboratory of Carbon-Based Functional Materials and Devices, Soochow University, Suzhou, 215123, China

Recommended Citation:
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]. Science Bulletin,2021-01-01,66(14)
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