| 학회 | 한국고분자학회 |
| 학술대회 | 2005년 봄 (04/14 ~ 04/15, 전경련회관) |
| 권호 | 30권 1호, p.479 |
| 발표분야 | 분자전자 부문위원회 |
| 제목 | Efficient white light-emitting diodes based on iridium complexes via efficient energy transfer from conjugated polymer |
| 초록 | We developed efficient white light-emitting diodes (LEDs) using polyfluorene-type blue-emitting conjugated polymer doped with green and red phosphorescent dyes. The emission spectrum of the conjugated polymer which has very high luminescent efficiency showed the large spectral overlap with green and red iridium complexes, and efficient energy transfer from conjugated polymer to iridium complexes was observed. Poly(N-vinylcarbazole) (PVK) was used to improve the miscibility between conjugated polymer and iridium complexes because of their poor chemical compatibility and phase seraration. The white emission spectrum was easily obtained by varying the contents of three materials and controlling the phase morphology. Moreover, these white LEDs showed a voltage-independent electroluminescence due to the similar threshold and driving voltage of three materials caused by energy transfer. This approach for white light emission is promising over the phosphorescent dyes-doped polymer blend system in terms of both efficiency and color stability. *Acknowledgement This research was supported by a grant (code #: 04K1510-01210) from ‘Center for Nanostructured Materials Technology’ under ‘21st Century Frontier R&D Programs’ of the Ministry of Science and Technology, Korea |
| 저자 | 김태호1, 박오옥1, 유재웅2, 김재경2 |
| 소속 | 1한국과학기술원, 2한국과학기술(연) |
| 키워드 | White light-emitting diodes; phosphorescence; energy transfer; conjugated polymer |
