Color-Pure Violet-Light-Emitting Diodes Based on Layered Lead Halide Perovskite Nanoplates

Liang, Dong; Peng, Yuelin; Fu, Yongping; Shearer, Melinda J.; Zhang, Jingjing; Zhai, Jianyuan; Zhang, Yi; Hamers, Robert J.; Andrew, Trisha L.; Jin, Song

doi:10.1021/acsnano.6b02683

Title: Color-Pure Violet-Light-Emitting Diodes Based on Layered Lead Halide Perovskite Nanoplates

Journal Article · Tue Jun 28 00:00:00 EDT 2016 · ACS Nano

DOI:https://doi.org/10.1021/acsnano.6b02683· OSTI ID:1259570

Liang, Dong ^[1]; Peng, Yuelin ^[1]; Fu, Yongping ^[1]; Shearer, Melinda J. ^[1]; Zhang, Jingjing ^[1]; Zhai, Jianyuan ^[1]; Zhang, Yi ^[1]; Hamers, Robert J. ^[1]; Andrew, Trisha L. ^[1]; Jin, Song ^[1]

Department of Chemistry and ‡Department of Electrical and Computer Engineering, University of Wisconsin−Madison, Madison, Wisconsin 53706, United States

Violet electroluminescence is rare in both inorganic and organic light-emitting diodes (LEDs). Low-cost and room- temperature solution-processed lead halide perovskites with high- efficiency and color-tunable photoluminescence are promising for LEDs. Here, we report room-temperature color-pure violet LEDs based on a two-dimensional lead halide perovskite material, namely, 2-phenylethylammonium (C₆H₅CH₂CH₂NH₃⁺, PEA) lead bromide [(PEA)₂PbBr₄]. The natural quantum confinement of two-dimen- sional layered perovskite (PEA)₂PbBr₄ allows for photoluminescence of shorter wavelength (410 nm) than its three-dimensional counterpart. By converting as-deposited polycrystalline thin films to micrometer-sized (PEA)₂PbBr₄ nanoplates using solvent vapor annealing, we successfully integrated this layered perovskite material into LEDs and achieved efficient room-temperature violet electroluminescence at 410 nm with a narrow bandwidth. This conversion to nanoplates significantly enhanced the crystallinity and photophysical properties of the (PEA)₂PbBr₄ samples and the external quantum efficiency of the violet LED. Finally, the solvent vapor annealing method reported herein can be generally applied to other perovskite materials to increase their grain size and, ultimately, improve the performance of optoelectronic devices based on perovskite materials.

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Research Organization:: Univ. of Wisconsin, Madison, WI (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES); US Air Force Office of Scientific Research (AFOSR); National Science Foundation (NSF)

Grant/Contract Number:: FG02-09ER46664; FA9550-14-1-0128

OSTI ID:: 1259570

Alternate ID(s):: OSTI ID: 1281965

Journal Information:: ACS Nano, Journal Name: ACS Nano Vol. 10 Journal Issue: 7; ISSN 1936-0851

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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77 NANOSCIENCE AND NANOTECHNOLOGY
layered perovskite
violet-light-emitting diode (LED)
solvent vapor annealing
nanoplate

Title: Color-Pure Violet-Light-Emitting Diodes Based on Layered Lead Halide Perovskite Nanoplates

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