An estimate of the inter-system crossing time in light-emitting polymers

Details An estimate of the inter-system crossing time in light-emitting polymers An estimate of the inter-system crossing time in light-emitting polymers

2004-10-26

arxiv.org/abs/physics/0410253v1

Physics

Chemical Physics

Submitted to Physical Review B

Scientific paper

The reported enhanced singlet-exciton yields in light-emitting polymers over the statistical limit of 25% has attracted wide experimental and theoretical attention. Most theoretical estimates of the singlet-exciton yield depend crucially on estimates of the inter-system crossing rates induced by spin-orbit coupling. In this paper we use the experimentally determined phosphorescent life-time and energy of the lowest-lying triplet state, as well as calculated values of Huang-Rhys factors to estimate the spin-orbit matrix element and inter-system crossing time between the lowest-lying singlet and triplet states.

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