We report the effect of polystyrene nanolayer on electron injection on the polymer light-emitting diodes (PLEDs) in which hole is major charge carrier. Especially, when a ∼10nm-thick polystyrene layer was employed, the device gave two orders a magnitude higher external quantum efficiency than that of the one without an insulting nanolayer. This enhancement may result from the dramatic lowering of the effective barrier height for electron injection to the emmiting layer.
Bibliographical noteFunding Information:
Received 1 October 2003; accepted 29 December 2003. This research was performed by the financial support of ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R & D Programs’ of the Ministry of Science and Technology, Korea. Address correspondence to Young Chul Kim, Mat Res Center for Information Display, College of Environment and Applied Chemistry, Kyung Hee University, Yongin, Kyunggi-do 449-701, Korea. Tel.: + 82-31-201-2372, Fax: + 82-31-204-2530, E-mail: firstname.lastname@example.org
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics