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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
发表期刊Acs Applied Materials & Interfaces
卷号9期号:3
摘要The 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.
收录类别sci ; ei
语种英语
文献类型期刊论文
条目标识符http://ir.ciomp.ac.cn/handle/181722/59193
专题中科院长春光机所知识产出
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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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