상세정보
학술지
Interlayer Engineering with Different Host Material Properties in Blue Phosphorescent Organic Light-Emitting Diodes
- 발행일
- 201102
- 출처
- ETRI Journal, v.33 no.1, pp.32-38
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 초록
- We investigated the light-emitting performances of blue phosphorescent organic light-emitting diodes, known as PHOLEDs, by incorporating an N,N'-dicarbazolyl-3,5-benzen interlayer between the hole transporting layer and emitting layer (EML). We found that the effects of the introduced interlayer for triplet exciton confinement and hole/electron balance in the EML were exceptionally dependent on the host materials: 9-(4-tert-butylphenyl)-3,6- bis(triphenylsilyl)-9H-carbazole, 9-(4-tert-butylphenyl)-3,6-ditrityl-9H- carbazole, and 4,4'-bis-triphenylsilanylbiphenyl. When an appropriate interlayer and host material were combined, the peak external quantum efficiency was greatly enhanced by over 21 times from 0.79% to 17.1%. Studies on the recombination zone using a series of host materials were also conducted. © 2011 ETRI.
- KSP 제안 키워드
- 4-Tert-butylphenyl, Blue phosphorescent organic light-emitting diodes, Electron balance, Exciton confinement, External Quantum Efficiency, Hole transporting layer, Organic light-emitting diodes(OLEDS), Recombination zone, Triplet exciton, host material, interlayer engineering