Efficiency improvement of organic light-emitting diodes depending on the thickness variation of BCP layer used for electron transport
- Authors
- Kim, W.-J.; Choi, H.-M.; Kim, J.-S.; Kim, T.-W.; Hong, J.-W.
- Issue Date
- 2009
- Keywords
- BCP; Deposition rate, efficiency improvement; Hole-blocking layer; OLEDs
- Citation
- Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials, pp.1219 - 1222
- Journal Title
- Proceedings of the IEEE International Conference on Properties and Applications of Dielectric Materials
- Start Page
- 1219
- End Page
- 1222
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/22531
- DOI
- 10.1109/ICPADM.2009.5252293
- ISSN
- 0000-0000
- Abstract
- In the devices structure of ITO/N, N'- diph enyl-N, N'bis(3-methylphenyl)- 1, 1'-bipheny1-4, 4'-diam ine(TPD)/tris(8-hydroxyquinoline)aluminum (Alq 3) electron-transport-layer(ETL) (2, 9-Dimethyl-4, 7diphenyl- l, 10-phenanthroline(BCP))/AI, we have studied the efficiency improvement of organic light-emitting diodes depending on the thickness variation of BCP using electron transport layer. The thickness of TPD and Alq3 was manufactured 40nm, 60nm under a base pressure of 5×10-6Torr using at thermal evaporation, respectively. The TPD and Alq, layer were evaporated to be deposition rate of 2.5 Å/s. And the BCP was evaporated to be at a deposition of 1.0Å/s. As the experimental results, we found that the luminous efficiency and the external quantum efficiency of the device is superior to others when thickness of BCP is 5 nm. Also, operating voltage is lowest. Compared to the ones from the devices without BCP layer, the luminous efficiency and the external quantum efficiency were improved by a factor of four hundred ninety and five hundred, respectively. And operating voltage is reduced to about 2 V. ©2009 IEEE.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - College of Engineering > Department of Science > 1. Journal Articles
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.