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DOI	10.1039/c8ee03051k
	Insights into operational stability and processing of halide perovskite active layers
	Schelhas L.T.; Li Z.; Christians J.A.; Goyal A.; Kairys P.; Harvey S.P.; Kim D.H.; Stone K.H.; Luther J.M.; Zhu K.; Stevanovic V.; Berry J.J.
发表日期	2019
ISSN	17545692
起始页码	1341
结束页码	1348
卷号	12 期号:4
英文摘要	Rapid improvement of the stability of metal halide perovskite materials is required to enable their adoption for energy production at terawatt scale. To understand the role of the active layer stability in these devices we use in situ X-ray diffraction to observe the evolution in structural stability across mixed A-site APbI3 materials where the A-site is a combination of formamidinium, Cs, and/or methylammonium. During device operation we observe spatial de-mixing and phase segregation into more pure constituent phases. Using complementary first-principles calculations of mixed A-site halide perovskites, a hypothesized framework explaining the experimentally observed mixing and de-mixing in these systems is presented and then validated using in situ X-ray diffraction and spatially resolved time of flight secondary ion mass spectrometry. Taken together, these results indicate that stability is not only a function of device architecture or chemical formulation, but that the processing strategy is critically important in synthesizing the most energetically favorable state and therefore the most stable device systems. This study reconciles disparate reports within the literature and also highlights the limitations of shelf life studies to ascertain stability as well as the importance of testing devices under operational conditions. © 2019 The Royal Society of Chemistry.
英文关键词	Calculations; Metal halides; Mixing; Perovskite; Secondary ion mass spectrometry; X ray diffraction; Device architectures; First-principles calculation; In-situ X-ray diffraction; Operational conditions; Operational stability; Processing strategies; Structural stabilities; Time of flight secondary ion mass spectrometry; Chemical stability; energy efficiency; instrumentation; operations technology; perovskite; processing; testing method; X-ray diffraction
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/189943
作者单位	SLAC National Accelerator Laboratory, Menlo Park, CA 94025, United States; National Renewable Energy Laboratory, Golden, CO 80401, United States; State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University, Shaanxi Joint Laboratory of Graphene (NPU), Xi'an, 710072, China; Hope College, Holland, MI 49423, United States; Colorado School of Mines, Golden, CO 80401, United States
推荐引用方式 GB/T 7714	Schelhas L.T.,Li Z.,Christians J.A.,et al. Insights into operational stability and processing of halide perovskite active layers[J],2019,12(4).
APA	Schelhas L.T..,Li Z..,Christians J.A..,Goyal A..,Kairys P..,...&Berry J.J..(2019).Insights into operational stability and processing of halide perovskite active layers.Energy & Environmental Science,12(4).
MLA	Schelhas L.T.,et al."Insights into operational stability and processing of halide perovskite active layers".Energy & Environmental Science 12.4(2019).