气候变化领域集成服务门户(CCPortal): Phase-Pure Hybrid Layered Lead Iodide Perovskite Films Based on a Two-Step Melt-Processing Approach

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DOI	10.1021/acs.chemmater.9b01265
	Phase-Pure Hybrid Layered Lead Iodide Perovskite Films Based on a Two-Step Melt-Processing Approach
	Li T.; Zeidell A.M.; Findik G.; Dunlap-Shohl W.A.; Euvrard J.; Gundogdu K.; Jurchescu O.D.; Mitzi D.B.
发表日期	2019
ISSN	8974756
起始页码	4267
结束页码	4274
卷号	31 期号:11
英文摘要	Layered lead halide perovskites have recently been heavily investigated due to their versatile structures, tunable electronic properties, and better stability compared with 3D perovskites and have also been effectively incorporated into photovoltaic and light-emitting devices. They are often prepared into thin film form by solution methods and typically contain a mixture of phases with different inorganic layer thicknesses (denoted by "n"). In addition, melt-processing has recently been introduced as an option for film deposition of n = 1 lead iodide-based perovskites. Here, we study the thermal properties of higher n (n > 1) layered perovskites in the family (β-Me-PEA)2MAn-1PbnI3n+1, with n = 1, 2, and 3 and where β-Me-PEA = β-methylphenethylammonium and MA = methylammonium, and reveal that they do not melt congruently. However, they can still be melt-processed in air by using a two-step process that includes a lower temperature postannealing step after the initial brief melting step. While typically higher n films contain a mixture of the different n phases, the resulting two-step melt-processed films are highly crystalline and phase pure. Optical and electrical properties of these films were further characterized by time-resolved photoluminescence and dark/illuminated transport measurements, showing the same order of magnitude single-exciton recombination rates compared to previous single crystal results and >2 orders of magnitude higher conductivity compared to conventional spin-coated films. These results offer new pathways to study the layered perovskites and to integrate them into electronic and optoelectronic devices. American Chemical Society.
scopus关键词	Electronic properties; Iodine compounds; Layered semiconductors; Light emission; Mixtures; Optoelectronic devices; Perovskite; Single crystals; Thin films; Halide perovskites; Light emitting devices; Lower temperatures; Optical and electrical properties; Orders of magnitude; Time-resolved photoluminescence; Transport measurements; Tunable electronic properties; Lead compounds
来源期刊	Chemistry of Materials
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/176407
作者单位	Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708, United States; Department of Chemistry, Duke University, Durham, NC 27708, United States; Department of Physics, Center for Functional Materials, Wake Forest University, Winston-Salem, NC 27109, United States; Department of Physics, North Carolina State University, Raleigh, NC 27606, United States
推荐引用方式 GB/T 7714	Li T.,Zeidell A.M.,Findik G.,et al. Phase-Pure Hybrid Layered Lead Iodide Perovskite Films Based on a Two-Step Melt-Processing Approach[J],2019,31(11).
APA	Li T..,Zeidell A.M..,Findik G..,Dunlap-Shohl W.A..,Euvrard J..,...&Mitzi D.B..(2019).Phase-Pure Hybrid Layered Lead Iodide Perovskite Films Based on a Two-Step Melt-Processing Approach.Chemistry of Materials,31(11).
MLA	Li T.,et al."Phase-Pure Hybrid Layered Lead Iodide Perovskite Films Based on a Two-Step Melt-Processing Approach".Chemistry of Materials 31.11(2019).