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Harvesting Triplet Excitons with Exciplex Thermally Activated Delayed Fluorescence Emitters toward High Performance Heterostructured Organic Light-Emitting Field Effect Transistors
Song, L.; Y. S. Hu; Z. Q. Liu; Y. Lv; X. Y. Guo and X. Y. Liu
2017
Source PublicationAcs Applied Materials & Interfaces
Volume9Issue:3
AbstractThe utilization of triplet excitons plays a key role in obtaining high emission efficiency for organic electroluminescent devices. However, to date, only phosphorescent materials have been implemented to harvest the triplet excitons in the organic light-emitting field effect transistors (OLEFETs). In this work, we report the first incorporation of exciplex thermally activated delayed fluorescence (TADF) emitters in heterostructured OLEFETs to harvest the triplet excitons. By developing a new kind of exciplex TADF emitter constituted by m-MTDATA (4,4',4 ''-tris (N-3-methylphenyl-N-phenylamino)triphenylamine) a as the donor and OXD-7 (1,3-bis[2-(4-tert-butylpheny1)-1,3,4-oxadiazo-5-yl]benzene) as the acceptor, an exciton utilization efficiency of 74.3% for the devices was achieved. It is found that the injection barrier between hole transport layer and emission layer as well as the ratio between donor and acceptor would influence the external quantum efficiency (EQE) significantly. Devices with a maximum EQE of 3.76% which is far exceeding the reported results for devices with conventional fluorescent emitters were successfully demonstrated. Moreover, the EQE at high brightness even outperformed the result for organic light emitting diode based on the same emitter. Our results demonstrate that the exciplex TADF emitters can be promising candidates to develop OLEFETs with high performance.
Indexed Bysci ; ei
Language英语
Document Type期刊论文
Identifierhttp://ir.ciomp.ac.cn/handle/181722/59193
Collection中科院长春光机所知识产出
Recommended Citation
GB/T 7714
Song, L.,Y. S. Hu,Z. Q. Liu,et al. Harvesting Triplet Excitons with Exciplex Thermally Activated Delayed Fluorescence Emitters toward High Performance Heterostructured Organic Light-Emitting Field Effect Transistors[J]. Acs Applied Materials & Interfaces,2017,9(3).
APA Song, L.,Y. S. Hu,Z. Q. Liu,Y. Lv,&X. Y. Guo and X. Y. Liu.(2017).Harvesting Triplet Excitons with Exciplex Thermally Activated Delayed Fluorescence Emitters toward High Performance Heterostructured Organic Light-Emitting Field Effect Transistors.Acs Applied Materials & Interfaces,9(3).
MLA Song, L.,et al."Harvesting Triplet Excitons with Exciplex Thermally Activated Delayed Fluorescence Emitters toward High Performance Heterostructured Organic Light-Emitting Field Effect Transistors".Acs Applied Materials & Interfaces 9.3(2017).
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