Date
Place
- Room C (Room 323)
- 36. Organic Light Emitting Transistors and Devices
- August 20, 2015 (Thursday)
- 15:30 ~ 17:10
- [36-3]
- 16:20 ~ 16:45
- Title:[Invited] High Performance Organic Light-Emitting Devices Based on Light-Emitting Polymers and Ionic Liquids
- Tomo Sakanoue and Taishi Takenobu (Waseda Univ., Japan)
Abstract: Organic light-emitting diodes (OLEDs) have successfully been applied to small-size displays and they are now expected for a much wider application. A crucial challenge for OLEDs is fabrication of high-performance devices with low-cost energy-saving processes. Another big challenge is a demonstration of electrically-pumped organic lasers. In order to challenge these issues, we are studying a potential use of light-emitting electrochemical cells (LECs) by using their flexibility of device designing. LECs are the light-emitting devices whose active layers are composed of single layer blends of light-emitting polymers and electrolytes. In this work, we adopted ionic liquids for the electrolyte of LECs. The newly designed ionic liquid dissolved light-emitting polymer, which gave a smooth and uniform active layer without phase separation. This enabled us to fabricate a high performance blue-emitting LECs that shows lower driving voltage and higher efficiency than an OLED using the same polymers. We also achieved high current injection over 1,000 A/cm2 into our LECs, which indicated our LEC is promising for the platform device for demonstrating organic semiconductor lasers.
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