| 학회 |
한국고분자학회 |
| 학술대회 |
2019년 가을 (10/09 ~ 10/11, 제주컨벤션센터) |
| 권호 |
44권 2호 |
| 발표분야 |
분자전자 부문위원회 II |
| 제목 |
Degradation Mechanism of Organic Light-Emitting Devices Incorporating Thermally Activated Delayed Fluorescence Dopants |
| 초록 |
Exploitation of the full potential of thermally activated delayed fluorescence (TADF) for electroluminescence is retarded by short operational lifetime. We recently proposed the degradation mechanism involving exciton-mediated electron transfer as the key process. We hypothesized an occurrence of the identical processes in OLEDs having TADF dopants. To examine this hypothesis, we investigated the degradation behaviors between 10-(4-(4,6-diphenyl-1,3,5-triazin-2-yl)phenyl)-10H-phenoxazine, a TADF dopant, and a variety of host molecules. Our electrochemical and spectroscopic studies indicated the generation of radical ion pair (RIP) through electron transfer from the TADF dopant to host excitons. The operation lifetime of the OLEDs correlated with the driving force for annihilation of RIP. Our study revealed the importance of electrochemical control between a TADF dopant and a host for realizing long operation lifetimes of OLEDs. |
| 저자 |
문유경1, 황산주1, 장호진2, 김신희1, 이준엽2, 유영민1
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| 소속 |
1이화여자대, 2성균관대 |
| 키워드 |
Thermally activated delayed fluorescence; Electron transfer
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| E-Mail |
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