Enhanced quantum efficiency in polymer light-emitting diode with polystryrene nanolayer

Jong Hyeok Park, O. Ok Park, Jae Woong Yu, Jai Kyeong Kim, Young Chul Kim

Research output: Contribution to journalArticlepeer-review


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.

Original languageEnglish
Pages (from-to)141-145
Number of pages5
JournalMolecular Crystals and Liquid Crystals
Publication statusPublished - 2004

Bibliographical note

Funding 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: kimyc@khu.ac.kr

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics


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