Demonstration of highly efficient orange EL device and warm white OLED

doi:10.1016/j.orgel.2018.02.019

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	Demonstration of highly efficient orange EL device and warm white OLED
	Xi, Z. Y.; Zhao, B.; Chen, L. Q.; Li, W. L.; Wang, H.; Liu, X. G.; Xu, B. S.
	2018
发表期刊	Organic Electronics
ISSN	1566-1199
卷号	57 页码:21-27
摘要	Exciplex is a well-known charge transfer excited-state complex formed between electron-donor and electron-acceptor molecules. The exciplex studied here is resulted from between the donor mCP and the acceptor PO-T2T, which acts as the host of orange emitting OLEDs. The emitter is orange phosphor Ir(pq)2acac. Our device based on the exciplex host and orange phosphor is very simple, but excellent EL performance was observed. That is, peak current efficiency of 35.3 cd/A, power efficiency of 31.0 lm/W and EQE of 18.7% at a 1.5 wt% orange phosphor, respectively. To date this is the highest orange OLED compared with other orange OLEDs with identical color performance. The better results were ascribed to reasonable device design and contribution from both singlet and triplet of exciplex host as well efficient energy transfer from exciplex host to the orange phosphor. The conclusion is based on the fact that exciplex emission comes from TADF process in which there is small Delta Es-t. This strategy enables to resolve the problem of the lower reverse intersystem crossing (RISC). Besides, warm white OLED was also achieved by lowering the dopant concentration, by which incomplete energy transfer from exciplex host to the orange phosphor could take place.
关键词	OLED Exciplex Orange Warm white TADF Roll-off light-emitting-diodes external quantum efficiency forster energy-transfer low roll-off hybrid woleds exciplex phosphorescent fluorescence host layer Materials Science Physics
DOI	10.1016/j.orgel.2018.02.019
收录类别	SCI ; EI
引用统计
文献类型	期刊论文
条目标识符	http://ir.ciomp.ac.cn/handle/181722/60943
专题	中国科学院长春光学精密机械与物理研究所
推荐引用方式 GB/T 7714	Xi, Z. Y.,Zhao, B.,Chen, L. Q.,et al. Demonstration of highly efficient orange EL device and warm white OLED[J]. Organic Electronics,2018,57:21-27.
APA	Xi, Z. Y..,Zhao, B..,Chen, L. Q..,Li, W. L..,Wang, H..,...&Xu, B. S..(2018).Demonstration of highly efficient orange EL device and warm white OLED.Organic Electronics,57,21-27.
MLA	Xi, Z. Y.,et al."Demonstration of highly efficient orange EL device and warm white OLED".Organic Electronics 57(2018):21-27.

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