Highly efficient bilayer red phosphorescent organic light-emitting devices with solution-processed emission layer
- Authors
- Park, Da-Young; Ha, Mi-Young; Moon, Dae-Gyu
- Issue Date
- Nov-2017
- Publisher
- National Institute of Research and Development for Optoelectronics
- Keywords
- OLED; Phosphorescence; Solution processing; PVK
- Citation
- Journal of Optoelectronics and Advanced Materials, v.19, no.11-12, pp 748 - 752
- Pages
- 5
- Journal Title
- Journal of Optoelectronics and Advanced Materials
- Volume
- 19
- Number
- 11-12
- Start Page
- 748
- End Page
- 752
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/7065
- ISSN
- 1454-4164
1841-7132
- Abstract
- We have developed highly efficient bilayer red phosphorescent organic light-emitting devices (OLEDs) using a solution processed poly(N-vinylcarbazole) (PVK) host layer doped with tris(2-phenyl-1-quinoline)indium(111) [Ir(phq)(3)] molecules. PVK was mixed with Ir(phq)3 molecules of 0.2 - 10 wt% in a chlorobenzene solution and spin-coated in order to prepare the emission layer. 3-(4-biphenyl)-4-phenyl-5-(4-tert-butylpheny1)-1,2,4-triazole (TAZ) was used as an electron transport material. The electrical conduction, emission, and efficiency characteristics of the OLEDs with a resultant structure of ITO/PVK:Ir(phq)(3)/TAZ/LiF/Alwere investigated. The maximum current efficiency and external quantum efficiency were 19.5 cd/A and 10.5%, respectively, in the device with 1% Ir(phq)(3) doped PVK host layer.
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Collections - College of Engineering > Department of Display Materials Engineering > 1. Journal Articles
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