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Title: Tunable electroluminescence for pure white emission from a perovskite-based LED
Authors: Vashishtha, Parth
Brown, Alasdair A. M.
Pu, Suan Hui
Mhaisalkar, Subodh
Mathews, Nripan
Keywords: Engineering::Materials
Issue Date: 2021
Source: Vashishtha, P., Brown, A. A. M., Pu, S. H., Mhaisalkar, S. & Mathews, N. (2021). Tunable electroluminescence for pure white emission from a perovskite-based LED. Advanced Electronic Materials, 7(4), 2001227-.
Project: 04INS000581C150 
Journal: Advanced Electronic Materials
Abstract: Halide perovskite nanocrystals are a promising candidate for lighting applications. However, the production of white light emitting diodes (LEDs) is still a major challenge due to halide ion segregation. In this work, it is demonstrated that reducing the thickness of the perovskite layer in an LED stack can modulate the recombination zone, such that a tunable emission can be obtained. This comprises of an orange electromer emission from a hole-transport layer (HTL), green electroluminescence from the perovskite active layer, and a blue monomer emission from the same HTL. Overall, a pure white emission can be achieved after successful device optimization, which is particularly challenging for LEDs in which the emission originates solely from perovskite layer. It is anticipated that this methodology could be employed on any type of green-emitting nanocrystals to fabricate white LEDs.
ISSN: 2199-160X
DOI: 10.1002/aelm.202001227
Schools: School of Materials Science and Engineering 
Research Centres: Energy Research Institute @ NTU (ERI@N) 
Research Techno Plaza 
Rights: © 2021 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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