CUED Publications database

Blue-Green Color Tunable Solution Processable Organolead Chloride-Bromide Mixed Halide Perovskites for Optoelectronic Applications.

Sadhanala, A and Ahmad, S and Zhao, B and Giesbrecht, N and Pearce, PM and Deschler, F and Hoye, RLZ and Gödel, KC and Bein, T and Docampo, P and Dutton, SE and De Volder, MFL and Friend, RH (2015) Blue-Green Color Tunable Solution Processable Organolead Chloride-Bromide Mixed Halide Perovskites for Optoelectronic Applications. Nano Lett, 15. pp. 6095-6101.

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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: Article
Uncontrolled Keywords: Blue perovskite LED bandgap tuning chloride bromide perovskite disorder narrow FWHM
Subjects: UNSPECIFIED
Divisions: Div E > Production Processes
Div B > Solid State Electronics and Nanoscale Science
Div E > Manufacturing Systems
Depositing User: Cron Job
Date Deposited: 17 Jul 2017 18:57
Last Modified: 22 Sep 2017 20:13
DOI: