期刊
MATERIALS CHEMISTRY FRONTIERS
卷 4, 期 3, 页码 1006-1012出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9qm00771g
关键词
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资金
- EPSRC [EP/N01202X/2, EP/P02744X, EP/R03480X]
- EPSRC [EP/R03480X/1, EP/N01202X/2, EP/P02744X/2] Funding Source: UKRI
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.
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