A model for steadystate luminescence of localizedstate ensemble
Abstract
A distribution function for localized carriers, f(E,T) = 1/(e^{(E  Ea)/kBT} + τ_{tr}/τ_{r}), is obtained 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 localizedstate ensemble with a Gaussiantype density of states. The model reproduces quantitatively all the anomalous temperature behaviors of localizedstate luminescence. It reduces to the wellknown bandtail and luminescence quenching models under certain approximations.
 Publication:

EPL (Europhysics Letters)
 Pub Date:
 September 2005
 DOI:
 10.1209/epl/i2005101707
 arXiv:
 arXiv:condmat/0411128
 Bibcode:
 2005EL.....71..994L
 Keywords:

 Other
 EPrint:
 14 pages, 4 figures