Abstract
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 language | English |
|---|---|
| Pages (from-to) | 75-78 |
| Number of pages | 4 |
| Journal | Materials Science and Engineering C |
| Volume | 24 |
| Issue number | 1-2 |
| DOIs | |
| Publication status | Published - 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