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DOI	10.1039/d0ee02043e
	Polymeric room-temperature molten salt as a multifunctional additive toward highly efficient and stable inverted planar perovskite solar cells
	Wang S.; Yang B.; Han J.; He Z.; Li T.; Cao Q.; Yang J.; Suo J.; Li X.; Liu Z.; Liu S.; Tang C.; Hagfeldt A.
发表日期	2020
ISSN	17545692
起始页码	5068
结束页码	5079
卷号	13 期号:12
英文摘要	The inferior power conversion efficiency (PCE) compared to their regular counterparts (n-i-p) and undesirable stability issues of inverted (p-i-n) perovskite solar cells (PSCs) are the foremost issues hindering their commercialization. Here, for the first time, we demonstrate a polymeric room-temperature molten salt (poly-RTMS), namely poly(1-vinyl-3-ethyl-acetate) imidazole tetrafluoroborate (PEa), as a novel type of additive to modulate the perovskite crystallization and its electronic properties. The PEa poly-RTMS containing multiple chemical anchoring sites along with strong bonding stability can firmly bond to Pb ion defects at grain boundaries and the interface of the perovskite film via coordination bond, which effectively passivates the electronic defects and enhances the photo-, thermal-, and moisture-stability of perovskite films. As a result, the PEa-modified inverted PSCs show striking performance improvements over the control with the PCE exceeding 21.4% and excellent long-term operational stability, maintaining over 92% of the initial efficiency for 1200 hours under continuous full sun illumination at 70-75 °C. This strategy opens a new avenue to modulate the properties of perovskites for optoelectronic applications. This journal is © The Royal Society of Chemistry.
英文关键词	Additives; Chemical bonds; Chemical stability; Conversion efficiency; Efficiency; Electronic properties; Fused salts; Grain boundaries; Image enhancement; Perovskite; Polymer solar cells; Polymers; Electronic defects; Initial efficiency; Multifunctional additives; Operational stability; Optoelectronic applications; Power conversion efficiencies; Room temperature molten salt; Tetrafluoroborates; Perovskite solar cells; detection method; fuel cell; perovskite; polymer; salt; temperature effect
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/189434
作者单位	State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an, 710072, China; Laboratory of Photomolecular Science, Institute of Chemical Sciences and Engineering, École Polytechnique Fédérale de Lausanne, Lausanne, 1015, Switzerland; School of Materials Science and Engineering, Shaanxi Normal University, Xi'an, 710119, China; Key Laboratory for Organic Electronics and Information Displays (KLOEID), Institute of Advanced Materials, Nanjing University of Posts and Telecommunications, 9 Wenyuan Road, Nanjing, 210023, China
推荐引用方式 GB/T 7714	Wang S.,Yang B.,Han J.,et al. Polymeric room-temperature molten salt as a multifunctional additive toward highly efficient and stable inverted planar perovskite solar cells[J],2020,13(12).
APA	Wang S..,Yang B..,Han J..,He Z..,Li T..,...&Hagfeldt A..(2020).Polymeric room-temperature molten salt as a multifunctional additive toward highly efficient and stable inverted planar perovskite solar cells.Energy & Environmental Science,13(12).
MLA	Wang S.,et al."Polymeric room-temperature molten salt as a multifunctional additive toward highly efficient and stable inverted planar perovskite solar cells".Energy & Environmental Science 13.12(2020).