상세정보
학술지
Effects of Charge Balance on Device Performances in Deep Blue Phosphorescent Organic Light-Emitting Diodes
- 발행일
- 201007
- 출처
- Organic Electronics, v.11 no.7, pp.1159-1164
- ISSN
- 1566-1199
- 출판사
- Elsevier
- 협약과제
- 09MB7400, 고효율 백색 OLED 소자 기술 개발, 추혜용
- 초록
- The performances of deep blue phosphorescent organic light-emitting diodes (PHOLEDs) have been investigated by changing the combination and the composition of host materials in a mixed host emissive layer (EML). An electron transport-type host material of m-bis- (triphenylsilyl)benzene (UGH3), was combined with an hole transport-type host materials, N,N??-dicarbazolyl-3, 5-benzene (mCP) or 4,4??,4?꿎??-tris(N-carbazolyl)triphenylamine (TcTa) both doped with a deep blue electro-phosphorescent dopant of iridium(III)bis(40,60-difluorophenylpyridinato) tetrakis(1-pyrazolyl)borate (FIr6). We found that a mixed host structure was effective to control the charge carrier injection and transport in EML. Therefore, we obtained highly improved efficiency in deep blue PHOLEDs with peak external quantum and luminance efficiencies of 22.9% and 39.2 lm/W with maintaining Commission Internationale de L'Eclairage (CIE) coordinates of (x = 0.163, y = 0.287). © 2010 Elsevier B.V. All rights reserved.
- KSP 제안 키워드
- Carrier injection and transport, Charge carrier injection, Deep blue phosphorescent organic light-emitting diodes, Electron Transport, Hole transport, Improved efficiency, Organic light-emitting diodes(OLEDS), blue PHOLEDs, charge balance, emissive layer(EL), host material