Abstract
Balanced charge injection and recombination in polymer light-emitting devices are very important for high brightness and quantum efficiency. Ionic materials such as ionomers, single-ion conductors, and bi-ionic ionic blend materials were employed as charge injection layers (hole injecting layer, electron injecting layer, or both of them) in polymer electroluminescent (EL) devices. The charge injection can be greatly promoted due to dipole moments or the ionic space charges near both electrodes. Theses multi-layer approaches using ionic materials highly improve the EL quantum efficiencies. When we fabricated kinds of energy-well devices by incorporating hole- and electron-injecting layers simultaneously, the EL efficiency was highly enhanced and the current-voltage-luminescence characteristics are very similar to the light-emitting electrochemical cells.
| Original language | English |
|---|---|
| Pages (from-to) | 144-151 |
| Number of pages | 8 |
| Journal | Proceedings of SPIE - The International Society for Optical Engineering |
| Volume | 4991 |
| DOIs | |
| Publication status | Published - 2003 |
| Event | PROCEEDINGS OF SPIE SPIE - The International Society for Optical Engineering: Organic Photonic Materials and Devices V - San Jose, CA, United States Duration: 2003 Jan 27 → 2003 Jan 30 |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Computer Science Applications
- Applied Mathematics
- Electrical and Electronic Engineering