| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 봄 (04/05 ~ 04/07, 대전컨벤션센터) |
| 권호 |
42권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Highly-efficient OLEDs by functional linker position and molecular orientation |
| 초록 |
We synthesized and characterized the new blue dopants with diphenylamine derivative containing malononitrile as a thermally activated delayed fluorescence(TADF) in organic light emitting diodes(OLEDs). The TADF-OLEDs with an m-phenyl linker dopant showed higher efficiencies of 12.62 cd/A and 8.81 lm/W compared to that with the p-phenyl linker dopant(1.38 cd/A and 0.70 lm/W), which had the m- or p-phenyl linker between an electrondonating diphenylamine unit and an electron-withdrawing malonitrile unit. A small charge-transfer singlet-triplet state splitting below 0.1 eV. In addition, the improved charge transport and light outcoupling of an emitter with the m-phenyl linker dopant was contributed by the well-aligned stacking structure with horizontal orientation compared to the p-phenyl linker dopant with random orientation analysis. |
| 저자 |
손선영1, 안형주2, 이한구2, 정성준1, 김윤희3
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| 소속 |
1포스텍, 2포항가속기(연), 3경상대 |
| 키워드 |
TADF; OLEDs; molecular orientation; GIXD
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| E-Mail |
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