气候变化领域集成服务门户(CCPortal): Enhanced solar cell stability by hygroscopic polymer passivation of metal halide perovskite thin film

CCPortal

DOI	10.1039/c8ee01101j
	Enhanced solar cell stability by hygroscopic polymer passivation of metal halide perovskite thin film
	Kim M.; Motti S.G.; Sorrentino R.; Petrozza A.
发表日期	2018
ISSN	17545692
起始页码	2609
结束页码	2619
卷号	11 期号:9
英文摘要	Long-term device stability is one of the most critical issues that impede perovskite solar cell commercialization. Here we show that a thin layer of a functional hygroscopic polymer, poly(ethylene oxide), PEO, on top of the perovskite thin film, can make perovskite-based solar cells highly stable during operation and in a humid atmosphere. We prove that PEO chemically interacts with lead ions on the perovskite surface, and thus passivates undercoordinated defect sites. Importantly, defect healing by PEO not only results in an improvement of the photo-voltage but also makes the perovskite thin film stable. We demonstrate that the hygroscopic PEO thin film can prevent water inclusion into the perovskite film by screening water molecules, thus having a multi-functional role. Overall, such interface engineering leads to highly durable perovskite solar cells, which, in the presence of PEO passivation, retained more than 95% of their initial power conversion efficiency over 15 h illumination, under load, in ambient atmosphere without encapsulation. Our findings experimentally reveal the role of interface engineering in mastering the instability of perovskite materials and propose a general approach for improving the reliability of perovskite-based optoelectronic devices. © 2018 The Royal Society of Chemistry.
英文关键词	Cell engineering; Ethylene; Image enhancement; Metal halides; Molecules; Optoelectronic devices; Passivation; Perovskite; Polyethylene oxides; Polymer solar cells; Solar cells; Thin films; Ambient atmosphere; Halide perovskites; Humid atmospheres; Hygroscopic polymers; Interface engineering; Multi-functional; Perovskite thin films; Power conversion efficiencies; Perovskite solar cells; efficiency measurement; electronic equipment; encapsulation; equipment; experimental study; film; fuel cell; halide; hygroscopicity; operations technology; performance assessment; perovskite; polymer
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/190130
作者单位	Center for Nano Science and Technology at Polimi, Istituto Italiano di Tecnologia, via Giovanni Pascoli 70/3, Milan, 20133, Italy; Dipartimento di Fisica, Politecnico di Milano, Piazza L. da Vinci, 32, Milano, 20133, Italy
推荐引用方式 GB/T 7714	Kim M.,Motti S.G.,Sorrentino R.,et al. Enhanced solar cell stability by hygroscopic polymer passivation of metal halide perovskite thin film[J],2018,11(9).
APA	Kim M.,Motti S.G.,Sorrentino R.,&Petrozza A..(2018).Enhanced solar cell stability by hygroscopic polymer passivation of metal halide perovskite thin film.Energy & Environmental Science,11(9).
MLA	Kim M.,et al."Enhanced solar cell stability by hygroscopic polymer passivation of metal halide perovskite thin film".Energy & Environmental Science 11.9(2018).