標題: Triplet-to-singlet exciton formation in poly(p-phenylene-vinylene) light-emitting diodes
作者: Lin, LC
Meng, HF
Shy, JT
Horng, SF
Yu, LS
Chen, CH
Liaw, HH
Huang, CC
Peng, KY
Chen, SA
物理研究所
Institute of Physics
公開日期: 24-Jan-2003
摘要: 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.
URI: http://dx.doi.org/10.1103/PhysRevLett.90.036601
http://hdl.handle.net/11536/28155
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.90.036601
期刊: PHYSICAL REVIEW LETTERS
Volume: 90
Issue: 3
起始頁: 0
結束頁: 0
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