A model for luminescence of localized state ensemble

Details A model for luminescence of localized state ensemble A model for luminescence of localized state ensemble

2004-11-05

arxiv.org/abs/cond-mat/0411128v1

Physics

Condensed Matter

Other Condensed Matter

14 pages, 4 figures

Scientific paper

10.1209/epl/i2005-10170-7

A distribution function for localized carriers, $f(E,T)=\frac{1}{e^{(E-E_a)/k_BT}+\tau_{tr}/\tau_r}$, is proposed by solving a rate equation, in which, electrical carriers' generation, thermal escape, recapture and radiative recombination are taken into account. Based on this distribution function, a model is developed for luminescence from localized state ensemble with a Gaussian-type density of states. The model reproduces quantitatively all the anomalous temperature behaviors of localized state luminescence. It reduces to the well-known band-tail and luminescence quenching models under certain approximations.

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