Coumarin-Based Thermally Activated Delayed Fluorescence Emitters with High External Quantum Efficiency and Low Efficiency Roll-off in the Devices
Jiaxiong Chen
1
,
Wei Liu
2, 3
,
Caijun Zheng
2, 4
,
Kai Wang
1, 2
,
Ke Liang
1
,
Yi Zhong Shi
1
,
Xue-mei OU
1
,
Xiaohong Zhang
1
Publication type: Journal Article
Publication date: 2017-03-02
scimago Q1
wos Q1
SJR: 1.921
CiteScore: 14.5
Impact factor: 8.2
ISSN: 19448244, 19448252
PubMed ID:
28218516
General Materials Science
Abstract
Thermally activated delayed fluorescence (TADF) emitters have attracted much interest for their great applications in organic light-emitting diodes (OLEDs), but the TADF OLEDs are limited by large efficiency roll-offs. In this study, we report two coumarin-based TADF emitters, 3-methyl-6-(10H-phenoxazin-10-yl)-1H-isochromen-1-one (PHzMCO) and 9-(10H-phenoxazin-10-yl)-6H-benzo[c]chromen-6-one (PHzBCO), with relatively high photoluminescence quantum yields (PLQYs) and extremely small singlet-triplet splittings. OLEDs using these two TADF compounds as the emitters respectively demonstrate high external quantum efficiencies of 17.8% for PHzMCO and 19.6% for PHzBCO, which are the highest among the reported coumarin-derivative-based OLEDs. More importantly, these devices based on PHzMCO and PHzBCO remained 10.3% and 12.9% at 10000 cd m-2, respectively, showing relatively low efficiency roll-offs at high brightness. These results reveal that the TADF emitters with high PLQYs can effectively reduce the efficiency roll-off in the devices.
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Citations from 2024:
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Chen J. et al. Coumarin-Based Thermally Activated Delayed Fluorescence Emitters with High External Quantum Efficiency and Low Efficiency Roll-off in the Devices // ACS applied materials & interfaces. 2017. Vol. 9. No. 10. pp. 8848-8854.
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Chen J., Liu W., Zheng C., Wang K., Liang K., Shi Y. Z., OU X., Zhang X. Coumarin-Based Thermally Activated Delayed Fluorescence Emitters with High External Quantum Efficiency and Low Efficiency Roll-off in the Devices // ACS applied materials & interfaces. 2017. Vol. 9. No. 10. pp. 8848-8854.
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TY - JOUR
DO - 10.1021/acsami.6b15816
UR - https://doi.org/10.1021/acsami.6b15816
TI - Coumarin-Based Thermally Activated Delayed Fluorescence Emitters with High External Quantum Efficiency and Low Efficiency Roll-off in the Devices
T2 - ACS applied materials & interfaces
AU - Chen, Jiaxiong
AU - Liu, Wei
AU - Zheng, Caijun
AU - Wang, Kai
AU - Liang, Ke
AU - Shi, Yi Zhong
AU - OU, Xue-mei
AU - Zhang, Xiaohong
PY - 2017
DA - 2017/03/02
PB - American Chemical Society (ACS)
SP - 8848-8854
IS - 10
VL - 9
PMID - 28218516
SN - 1944-8244
SN - 1944-8252
ER -
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@article{2017_Chen,
author = {Jiaxiong Chen and Wei Liu and Caijun Zheng and Kai Wang and Ke Liang and Yi Zhong Shi and Xue-mei OU and Xiaohong Zhang},
title = {Coumarin-Based Thermally Activated Delayed Fluorescence Emitters with High External Quantum Efficiency and Low Efficiency Roll-off in the Devices},
journal = {ACS applied materials & interfaces},
year = {2017},
volume = {9},
publisher = {American Chemical Society (ACS)},
month = {mar},
url = {https://doi.org/10.1021/acsami.6b15816},
number = {10},
pages = {8848--8854},
doi = {10.1021/acsami.6b15816}
}
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MLA
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Chen, Jiaxiong, et al. “Coumarin-Based Thermally Activated Delayed Fluorescence Emitters with High External Quantum Efficiency and Low Efficiency Roll-off in the Devices.” ACS applied materials & interfaces, vol. 9, no. 10, Mar. 2017, pp. 8848-8854. https://doi.org/10.1021/acsami.6b15816.