气候变化领域集成服务门户(CCPortal): Anisotropic carrier diffusion in single MAPbI3grains correlates to their twin domains

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DOI	10.1039/d0ee01016b
	Anisotropic carrier diffusion in single MAPbI3grains correlates to their twin domains
	Hermes I.M.; Best A.; Winkelmann L.; Mars J.; Vorpahl S.M.; Mezger M.; Collins L.; Butt H.-J.; Ginger D.S.; Koynov K.; Weber S.A.L.
发表日期	2020
ISSN	1754-5692
起始页码	4168
结束页码	4177
卷号	13 期号:11
英文摘要	Polycrystalline thin films and single crystals of hybrid perovskites-a material group successfully used for photovoltaic and optoelectronic applications-reportedly display heterogeneous charge carrier dynamics often attributed to grain boundaries or crystalline strain. Here, we locally resolved the carrier diffusion in large, isolated methylammonium lead iodide (MAPbI3) grains via spatial- A nd time-resolved photoluminescence microscopy. We found that the anisotropic carrier dynamics directly correlate with the arrangement of ferroelastic twin domains. Comparing diffusion constants parallel and perpendicular to the domains showed carriers diffuse around 50-60% faster along the parallel direction. Extensive piezoresponse force microscopy experiments on the nature of the domain pattern suggest that the diffusion anisotropy most likely originates from structural and electrical anomalies at ferroelastic domain walls. We believe that the domain walls act as shallow energetic barriers, which delay the transversal diffusion of carriers. Furthermore, we demonstrate a rearrangement of the domains via heat treatment above the cubic-tetragnal phase transition. Together with the previously reported strain engineering via external stress, our findings promise additional routes to tailor the directionality of the charge carrier diffusion in MAPbI3-based photovoltaics and optoelectronics as well as other ferroelastic materials for optoelectronic applications. © The Royal Society of Chemistry.
语种	英语
scopus关键词	Anisotropy; Charge carriers; Domain walls; Grain boundaries; Heat treatment; Iodine compounds; Layered semiconductors; Lead compounds; Lead metallography; Nanocrystalline materials; Perovskite; Scanning probe microscopy; Thin film solar cells; Charge carrier dynamics; Diffusion anisotropy; Ferroelastic domains; Ferroelastic materials; Optoelectronic applications; Piezoresponse force microscopy; Polycrystalline thin film; Time-resolved photoluminescence; Diffusion; diffusion; electronic equipment; film; iodide; perovskite; photovoltaic system; thin section
来源期刊	Energy and Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162501
作者单位	Max Planck Institute for Polymer Research, Ackermannweg 10, Mainz, 55128, Germany; Institute of Physics, Johannes Gutenberg University Mainz, Duesbergweg 10-14, Mainz, 55128, Germany; Department of Chemistry, University of Washington, Seattle, WA 98105, United States; Center for Nanophase Materials Sciences, Oak Ridge National Laboratory, 1 Bethel Valley Rd., Oak Ridge, TN 37830, United States
推荐引用方式 GB/T 7714	Hermes I.M.,Best A.,Winkelmann L.,et al. Anisotropic carrier diffusion in single MAPbI3grains correlates to their twin domains[J],2020,13(11).
APA	Hermes I.M..,Best A..,Winkelmann L..,Mars J..,Vorpahl S.M..,...&Weber S.A.L..(2020).Anisotropic carrier diffusion in single MAPbI3grains correlates to their twin domains.Energy and Environmental Science,13(11).
MLA	Hermes I.M.,et al."Anisotropic carrier diffusion in single MAPbI3grains correlates to their twin domains".Energy and Environmental Science 13.11(2020).