Enhancement of efficiencies for tandem green phosphorescent organic light-emitting devices with a p-type charge generation layer
- Title
- Enhancement of efficiencies for tandem green phosphorescent organic light-emitting devices with a p-type charge generation layer
- Author
- 김태환
- Keywords
- Organic compounds; Thin films; Luminescence; Optical properties; Electrical properties
- Issue Date
- 2014-10
- Publisher
- Elsevier Science B.V., Amsterdam.
- Citation
- Materials research bulletin , Vol.58, No.- [2014] ,pp.141-144
- Abstract
- Tandem green phosphorescent organic light-emitting devices with a 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile or a molybdenum trioxide charge generation layer were fabricated to enhance their efficiency. Current density?voltage curves showed that the operating voltage of the tandem green phosphorescent organic light-emitting device with a 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile layer was improved by 3% over that of the corresponding organic light-emitting device with a molybdenum trioxide layer. The efficiency and the brightness of the tandem green phosphorescent organic light-emitting device were 13.9 cd/A and 26,540 cd/m2, respectively. The current efficiency of the tandem green phosphorescent organic light-emitting device with a 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile layer was lower by 1.1 times compared to that of the corresponding organic light-emitting device with molybdenum trioxide layer due to the decreased charge generation and transport in the 1,4,5,8,9,11-hexaazatriphenylene-hexacarbonitrile layer resulting from triplet?triplet exciton annihilation.
- URI
- https://www.sciencedirect.com/science/article/pii/S002554081400230X?via%3Dihubhttp://hdl.handle.net/20.500.11754/52621
- ISSN
- 0025-5408
- DOI
- 10.1016/j.materresbull.2014.04.045
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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