| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 봄 (04/04 ~ 04/06, 대전컨벤션센터) |
| 권호 |
43권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Molecular Orientation of Host Materials for High-Efficiency Phosphorescent Organic Light-Emitting Diodes |
| 초록 |
We investigated the vacuum-processed phosphorescent organic light-emitting diodes (PHOLEDs) characteristics using the diphenylbis(3-(pyridine-2-yl)phenyl)silane (2PTPS), diphenylbis(3-(pyridine-3-yl)phenyl)silane (3PTPS), and diphenylbis(3-(pyridine-4-yl)phenyl)silane (4PTPS) host materials. The 4PTPS-based PHOLEDs with tris[2-phenylpyridinato-C2,N]iridium(III) [Ir(ppy)3] dopant with homoleptic-structure showed highest current efficiency of 53.54 cd/A compared to those of 2PTPS (40.75 cd/A) and 3PTPS (29.35 cd/A). This result has caused by the well-aligned structure with preferential horizontal orientation of the emitting materials by two-dimensional grazing incidence X-ray diffraction (2D-GIXD) analysis. We found that the molecular orientation of 4PTPS-based co-host and co-host:dopant showed better priority to the horizontal direction than the 2PTPS and 3PTPTS host materials, which implies the importance of preferential orientation of the host molecule. |
| 저자 |
손선영1, 박광훈2, 권순기2, 안형주3, 이한구3, 정성준1, 김윤희2
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| 소속 |
1POSTECH, 2경상대, 3포항가속기(연) |
| 키워드 |
PHOLEDs; Molecular Orientation; GIXD
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| E-Mail |
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