Electrical and Optical Properties of Phosphorescent Organic Light-Emitting Devices with a TAPC Host
- Authors
- Kim, Tae-Yong; Moon, Dae-Gyu
- Issue Date
- Apr-2011
- Publisher
- 한국전기전자재료학회
- Keywords
- Organic light-emitting device; Phosphorescence; TAPC; Host; FIrpic
- Citation
- Transactions on Electrical and Electronic Materials, v.12, no.2, pp 84 - 87
- Pages
- 4
- Journal Title
- Transactions on Electrical and Electronic Materials
- Volume
- 12
- Number
- 2
- Start Page
- 84
- End Page
- 87
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/16620
- DOI
- 10.4313/TEEM.2011.12.2.84
- ISSN
- 1229-7607
2092-7592
- Abstract
- We fabricated phosphorescent organic light-emitting devices with a 1,1-bis[(di-4-tolylamino) phenyl] cyclohexane (TAPC) host layer. Two kinds of devices, one of ITO/TAPC/TAPC: FIrpic/TAZ/LiF/Al (device A) and one of ITO/TAPC: FIrpic/TAPC/TAZ/LiF/Al (device B), were prepared to investigate electrical and optical properties. Iridium(III) bis[(4,6-difluorophenyl)-pyridinato-N, C-2'] picolinate (FIrpic) and 3-(4-biphenylyl)-4-phenyl-5-(4-tert-butylphenyl)1,2,4- triazole (TAZ) were used as a blue phosphorescent guest material and an electron transport layer, respectively. The TAPC layer in device B strongly contributes to whitish emission, higher driving voltage, and lower current efficiency characteristics compared with device A. The mechanisms of these electrical and optical characteristics of the devices were investigated.
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