Molecular oreintation of host mateirals for high-efficiency phosphorescent organic light-emiting diodes
- Title
- Molecular oreintation of host mateirals for high-efficiency phosphorescent organic light-emiting diodes
- Authors
- 손선영; 박광훈; 권순기; 안형주; 이한구; 정성준; 김윤희
- Date Issued
- 2018-04-06
- Publisher
- 한국고분자학회
- Abstract
- 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/94422
- ISSN
- 2508-4704
- Article Type
- Conference
- Citation
- 2018년 한국고분자학회 춘계학술대회, page. 109 - 109, 2018-04-06
- Files in This Item:
- There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.