气候变化领域集成服务门户(CCPortal): Elucidating the long-range charge carrier mobility in metal halide perovskite thin films

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DOI	10.1039/c8ee03395a
	Elucidating the long-range charge carrier mobility in metal halide perovskite thin films
	Lim J.; Hörantner M.T.; Sakai N.; Ball J.M.; Mahesh S.; Noel N.K.; Lin Y.-H.; Patel J.B.; McMeekin D.P.; Johnston M.B.; Wenger B.; Snaith H.J.
发表日期	2019
ISSN	1754-5692
起始页码	169
结束页码	176
卷号	12 期号:1
英文摘要	Many optoelectronic properties have been reported for lead halide perovskite polycrystalline films. However, ambiguities in the evaluation of these properties remain, especially for long-range lateral charge transport, where ionic conduction can complicate interpretation of data. Here we demonstrate a new technique to measure the long-range charge carrier mobility in such materials. We combine quasi-steady-state photo-conductivity measurements (electrical probe) with photo-induced transmission and reflection measurements (optical probe) to simultaneously evaluate the conductivity and charge carrier density. With this knowledge we determine the lateral mobility to be ~2 cm 2 V -1 s -1 for CH 3 NH 3 PbI 3 (MAPbI 3 ) polycrystalline perovskite films prepared from the acetonitrile/methylamine solvent system. Furthermore, we present significant differences in long-range charge carrier mobilities, from 2.2 to 0.2 cm 2 V -1 s -1 , between films of contemporary perovskite compositions prepared via different fabrication processes, including solution and vapour phase deposition techniques. Arguably, our work provides the first accurate evaluation of the long-range lateral charge carrier mobility in lead halide perovskite films, with charge carrier density in the range typically achieved under photovoltaic operation. © 2019 The Royal Society of Chemistry.
语种	英语
scopus关键词	Carrier concentration; Film preparation; Lead compounds; Metal halides; Organic solvents; Perovskite; Perovskite solar cells; Probes; Thin films; Fabrication process; Interpretation of data; Optoelectronic properties; Photovoltaic operation; Polycrystalline film; Polycrystalline perovskite; Reflection measurements; Vapour phase depositions; Carrier mobility; element mobility; halide; induced response; ionic composition; metal; probe; solvent
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/162631
作者单位	Clarendon Laboratory, University of Oxford, Parks Road, Oxford, OX1 3PU, United Kingdom
推荐引用方式 GB/T 7714	Lim J.,Hörantner M.T.,Sakai N.,et al. Elucidating the long-range charge carrier mobility in metal halide perovskite thin films[J],2019,12(1).
APA	Lim J..,Hörantner M.T..,Sakai N..,Ball J.M..,Mahesh S..,...&Snaith H.J..(2019).Elucidating the long-range charge carrier mobility in metal halide perovskite thin films.Energy and Environmental Science,12(1).
MLA	Lim J.,et al."Elucidating the long-range charge carrier mobility in metal halide perovskite thin films".Energy and Environmental Science 12.1(2019).