Blue-green color tunable solution processable organolead chloride–bromide mixed halide perovskites for optoelectronic applications

Sadhanala, A. et al. (2015) Blue-green color tunable solution processable organolead chloride–bromide mixed halide perovskites for optoelectronic applications. Nano Letters, 15(9), pp. 6095-6101. (doi: 10.1021/acs.nanolett.5b02369) (PMID:26236949) (PMCID:PMC4762541)

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Abstract

Solution-processed organo-lead halide perovskites are produced with sharp, color-pure electroluminescence that can be tuned from blue to green region of visible spectrum (425–570 nm). This was accomplished by controlling the halide composition of CH3NH3Pb(BrxCl1–x)3 [0 ≤ x ≤ 1] perovskites. The bandgap and lattice parameters change monotonically with composition. The films possess remarkably sharp band edges and a clean bandgap, with a single optically active phase. These chloride–bromide perovskites can potentially be used in optoelectronic devices like solar cells and light emitting diodes (LEDs). Here we demonstrate high color-purity, tunable LEDs with narrow emission full width at half maxima (FWHM) and low turn on voltages using thin-films of these perovskite materials, including a blue CH3NH3PbCl3 perovskite LED with a narrow emission FWHM of 5 nm.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Docampo, Dr Pablo
Authors: Sadhanala, A., Ahmad, S., Zhao, B., Giesbrecht, N., Pearce, P. M., Deschler, F., Hoye, R. L. Z., Gödel, K. C., Bein, T., Docampo, P., Dutton, S. E., De Volder, M. F. L., and Friend, R. H.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Nano Letters
Publisher:American Chemical Society
ISSN:1530-6984
ISSN (Online):1530-6992
Published Online:03 August 2015
Copyright Holders:Copyright © 2015 American Chemical Society
First Published:First published in Nano Letters 15(9): 6095-9101
Publisher Policy:Reproduced under a Creative Commons License

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