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High efficiency and low roll-off green OLEDs with simple structure by utilizing thermally activated delayed fluorescence material as the universal host
Zhao, B.; Y. Q. Miao; Z. Q. Wang; K. X. Wang; H. Wang; Y. Y. Hao; B. S. Xu and W. L. Li
2017
Source PublicationNanophotonics
Volume6Issue:5
AbstractWe achieved high-efficiency and low-roll-off green fluorescent and phosphorescent organic lightemitting diodes (OLEDs) simultaneously by adopting the thermally activated delayed fluorescence material of bis[4-(9,9-dimethyl-9,10-dihydroacridine) phenyl]sulfone as the universal host. At a luminance of 1000 cd/m(2), fluorescent OLEDs based on C545T get a current efficiency, power efficiency, and external quantum efficiency (EQE) of 31.8 cd/A, 25.0 lm/W, and 9.26%, respectively. This is almost the highest efficiency based on C545T at the luminance of 1000 cd/m(2) to date. On the other hand, phosphorescent OLEDs with Ir(ppy)(3) as the emitter realize a maximum current efficiency, power efficiency, and EQE of 64.3 cd/A, 62.4 lm/W, and 18.5%, respectively. More important, the EQE remains 17.8% at the representative luminance of 1000 cd/m(2) and the roll-off ratio is just 3.78%. The transient photoluminescence decay measurement demonstrates that the up-conversion of host triplet excitons plays a key role in the high efficiency and low roll-off. More detailed discussions are also given.
Indexed Bysci ; ei
Language英语
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/59470
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Zhao, B.,Y. Q. Miao,Z. Q. Wang,et al. High efficiency and low roll-off green OLEDs with simple structure by utilizing thermally activated delayed fluorescence material as the universal host[J]. Nanophotonics,2017,6(5).
APA Zhao, B..,Y. Q. Miao.,Z. Q. Wang.,K. X. Wang.,H. Wang.,...&B. S. Xu and W. L. Li.(2017).High efficiency and low roll-off green OLEDs with simple structure by utilizing thermally activated delayed fluorescence material as the universal host.Nanophotonics,6(5).
MLA Zhao, B.,et al."High efficiency and low roll-off green OLEDs with simple structure by utilizing thermally activated delayed fluorescence material as the universal host".Nanophotonics 6.5(2017).
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