Triplet-to-singlet exciton formation in poly(p-phenylene-vinylene) light-emitting diodes |
| |
| Authors: | Lin L C Meng H F Shy J T Horng S F Yu L S Chen C H Liaw H H Huang C C Peng K Y Chen S A |
| |
| Affiliation: | Institute of Physics, National Chiao Tung University, Hsinchu 300, Taiwan, Republic of China. |
| |
| Abstract: | The triplet to singlet exciton formation ratio in a MEH-PPV light-emitting diode is measured by comparing the triplet-induced absorptions with optical and electric excitations at the 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-independent value 3 at intermediate field but is reduced to about 2 for higher field. |
| |
| Keywords: | |
| 本文献已被 PubMed 等数据库收录！ |
|
