標題: | Large enhancement of intersystem crossing in polyfluorenes by iridium-complex doping |
作者: | Liao, Hua-Hsien Yang, Chia-Ming Wu, Chi-Hui Horng, Sheng-Fu Lee, Wei-Shan Meng, Hsin-Fei Shy, Jow-Tsong Hsu, Chain-Shu 應用化學系 物理研究所 Department of Applied Chemistry Institute of Physics |
公開日期: | 1-一月-2007 |
摘要: | Photoinduced absorption is used to study the intersystem crossing (ISC) rate of two polyfluorenes doped with iridium (III) tris[2-(4-totyl)pyridinato-N,C2]. It is found that the triplet exciton lifetime of polyfluorene is reduced by the dopants. But instead of decreasing, the population density of polyfluorene triplet exciton increases by almost one order of magnitude. The finding shows that the ISC rate can increase over 100 times due to the spin-orbital interaction with the Ir ion even though it is covered by the ligands. Specifically, the ISC lifetime changes from the intrinsic value of 62 ns to as short as 0.28 ns upon 10% doping. |
URI: | http://dx.doi.org/10.1063/1.2424667 http://hdl.handle.net/11536/11245 |
ISSN: | 0003-6951 |
DOI: | 10.1063/1.2424667 |
期刊: | APPLIED PHYSICS LETTERS |
Volume: | 90 |
Issue: | 1 |
結束頁: | |
顯示於類別: | 期刊論文 |