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Issue 28, 2019
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Perovskite white light-emitting diodes based on a molecular blend perovskite emissive layer

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Abstract

Perovskite light-emitting diodes (LEDs) are attractive because of their high efficiency and narrow emission. However, most of the current research on perovskite LEDs with primary color emission is focused on performance enhancement. Only a few studies focused on perovskite white LEDs. Here, we realized a perovskite white light-emitting diode with a single emissive layer by mixing the emission from a sky-blue perovskite material and an orange-near infrared (NIR) organic compound. Compounds with orange-NIR emission are synthesized and the influence of the compounds on the perovskite films is investigated by absorption and photoluminescence spectroscopy, X-ray diffraction, scanning electron microscopy and confocal laser-scanning fluorescence microscopy. Perovskite white LEDs were realized with CIE chromaticity coordinates of (0.3, 0.49), which are approaching the ideal pure white emission coordinates (0.33, 0.33).

Graphical abstract: Perovskite white light-emitting diodes based on a molecular blend perovskite emissive layer

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Article information


Submitted
20 Mar 2019
Accepted
14 Jun 2019
First published
15 Jun 2019

J. Mater. Chem. C, 2019,7, 8634-8642
Article type
Paper

Perovskite white light-emitting diodes based on a molecular blend perovskite emissive layer

C. Chang, A. N. Solodukhin, S. Liao, K. P. O. Mahesh, C. Hsu, S. A. Ponomarenko, Y. N. Luponosov and Y. Chao, J. Mater. Chem. C, 2019, 7, 8634
DOI: 10.1039/C9TC01509D

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