Wiles, A. A. et al. (2020) A poly(urethane)-encapsulated benzo[2,3-d:6,7-d’]diimidazole organic down-converter for green hybrid LEDs. Materials Chemistry Frontiers, 4(3), pp. 1006-1012. (doi: 10.1039/C9QM00771G)
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Abstract
The development of organic down-converting materials continues to attract attention in hybrid LED technology by obviating the need for non-sustainable rare-earth elements. In this work, a benzodiimidazole-based system (TPA-BDI) has been employed as a down-converting layer in a hybrid organic–inorganic LED device. A commercially available poly(urethane)-based resin is used as the encapsulating material, providing a dilute layer of TPA-BDI that is deposited on top of the GaN-based LED. Crucially, the solution-state emissive performance is generally maintained when encapsulated at low concentrations within this resin. A maximum luminous efficacy of 87 lm W−1 was demonstrated using a 1.0 mg ml−1 concentration of TPA-BDI in the resin. The suitability of using organic down-converters to produce green light from hybrid devices was demonstrated by the excellent repeatability of the device characteristics across a series of encapsulated LEDs.
Item Type: | Articles |
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Status: | Published |
Refereed: | Yes |
Glasgow Author(s) Enlighten ID: | Skabara, Professor Peter and Cariello, Dr Michele and Cooke, Professor Graeme and Mohammed, Nabeel and Wiles, Dr Alan and Cameron, Dr Joseph and Findlay, Dr Neil |
Authors: | Wiles, A. A., Bruckbauer, J., Mohammed, N., Cariello, M., Cameron, J., Findlay, N. J., Taylor-Shaw, E., Wallis, D. J., Martin, R. W., Skabara, P., and Cooke, G. |
College/School: | College of Science and Engineering College of Science and Engineering > School of Chemistry |
Journal Name: | Materials Chemistry Frontiers |
Publisher: | Royal Society of Chemistry |
ISSN: | 2052-1529 |
ISSN (Online): | 2052-1529 |
Published Online: | 06 February 2020 |
Copyright Holders: | Copyright © 2020 The Royal Society of Chemistry and the Chinese Chemical Society |
First Published: | First published in Materials Chemistry Frontiers 4(3): 1006-1012 |
Publisher Policy: | Reproduced under a Creative Commons License |
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