气候变化领域集成服务门户(CCPortal): Revealing defective nanostructured surfaces and their impact on the intrinsic stability of hybrid perovskites

CCPortal

DOI	10.1039/d1ee00116g
	Revealing defective nanostructured surfaces and their impact on the intrinsic stability of hybrid perovskites
	Lin Y.; Liu Y.; Chen S.; Wang S.; Ni Z.; Van Brackle C.H.; Yang S.; Zhao J.; Yu Z.; Dai X.; Wang Q.; Deng Y.; Huang J.
发表日期	2021
ISSN	17545692
起始页码	1563
结束页码	1572
卷号	14 期号:3
英文摘要	The instability of metal halide perovskites (MHPs) remains to be one major obstacle for the commercialization of perovskite solar cells. Here we report the observation of nanocrystals and some amorphous phases at the surface of apparent single crystalline grains in polycrystalline films deposited by almost all known solution deposition methods, which accelerate the degradation of MHPs. By removing the defective surface layer through mechanical polishing, the stability of perovskite films is significantly enhanced. Encapsulated solar cells based on polished MHPs retain 93% of their initial efficiency after continuous illumination for 2180 hours at 1 sun intensity and with ultraviolet radiation at 65 °C. Removing the defective surface layers restores the mechanical hardness to be comparable to that of single crystals, which suppresses ion migration and permeation of detrimental species into perovskite grains. This study narrows down the stability gap between the MHP polycrystalline films and single crystal perovskites which represents the upper limit for the stability of MHPs. © 2021 The Royal Society of Chemistry.
英文关键词	Metal halides; Perovskite; Single crystals; Stability; Halide perovskites; Intrinsic stability; Mechanical hardness; Mechanical polishing; Nanostructured surface; Polycrystalline film; Single-crystalline; Solution-deposition method; Perovskite solar cells; nanomaterial; perovskite; power generation; solar power
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/190751
作者单位	Department of Applied Physical Sciences, University of North Carolina, Chapel Hill, NC 27599, United States; Department of Mechanical and Materials Engineering, Nebraska Center for Materials and Nanoscience, University of Nebraska-Lincoln, Lincoln, NE 68588, United States
推荐引用方式 GB/T 7714	Lin Y.,Liu Y.,Chen S.,et al. Revealing defective nanostructured surfaces and their impact on the intrinsic stability of hybrid perovskites[J],2021,14(3).
APA	Lin Y..,Liu Y..,Chen S..,Wang S..,Ni Z..,...&Huang J..(2021).Revealing defective nanostructured surfaces and their impact on the intrinsic stability of hybrid perovskites.Energy & Environmental Science,14(3).
MLA	Lin Y.,et al."Revealing defective nanostructured surfaces and their impact on the intrinsic stability of hybrid perovskites".Energy & Environmental Science 14.3(2021).