標題: | Triplet exciton formation ratio in poly(p-phenylene-vinylene) light-emitting diode |
作者: | Lin, LC Meng, HF Shy, JT Horng, SF Yu, LS Chen, CH Liaw, HH Huang, CC Peng, GY Chen, SA 物理研究所 Institute of Physics |
關鍵字: | triplet exciton;light-emitting-diode |
公開日期: | 4-四月-2003 |
摘要: | The triplet to singlet exciton formation ratio in a poly(2-methoxy-5(2'-ethyl-hexyloxy)-1,4-phenylene vinylene) (MEH-PPV) light-emitting-diode is measured by comparing the triplet induced-absorptions with optical and electric excitations at same singlet exciton density. The ratio is a strong universal decreasing function of the averaged electric field. Using 4 ns for singlet to triplet intersystem crossing time, the ratio is significantly larger than the spin-statistics value 3 at intermediate field but is reduced to about 1 for higher field. |
URI: | http://dx.doi.org/10.1016/S0379-6779(02)00517-9 http://hdl.handle.net/11536/27971 |
ISSN: | 0379-6779 |
DOI: | 10.1016/S0379-6779(02)00517-9 |
期刊: | SYNTHETIC METALS |
Volume: | 135 |
Issue: | 1-3 |
起始頁: | 425 |
結束頁: | 426 |
顯示於類別: | 會議論文 |