Enhanced quantum efficiency in blue-emitting polymer/dielectric nanolayer nanocomposite light-emitting devices

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

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


Light-emitting devices based on environmentally stable, blue-emitting polymer/dielectric nanolayer nanocomposites were fabricated by blending poly(di-octylfluorene) (PDOF) with organo-clay. By reducing the excimer formation that leads to long wavelength tails, the photoluminescence (PL) and electroluminescence (EL) color purity of the device was enhanced. When a conjugated polymer/ dielectric nanolayer nanocomposite is applied to an EL device, we expect an electronic structure similar to the well-known quantum well in small nanodomains. The ratio of PDOF/organo-clay was regulated from 2:1 to 0.5:1 (w/w). The light-emitting device of 0.5:1 (w/w) blend demonstrated the highest quantum efficiency (QE), 0.72% (ph/el), which is ∼500 times higher value compared with that of the pure PDOF layer device. However, the driving voltage of the nanocomposite devices tended to increase with increasing organo-clay content.

Original languageEnglish
Pages (from-to)75-78
Number of pages4
JournalMaterials Science and Engineering C
Issue number1-2
Publication statusPublished - 2004 Jan 5

Bibliographical note

Funding Information:
This research was performed by the financial support of ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R&D Program’ of the Ministry of Science and Technology, Korea.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


Dive into the research topics of 'Enhanced quantum efficiency in blue-emitting polymer/dielectric nanolayer nanocomposite light-emitting devices'. Together they form a unique fingerprint.

Cite this