Volume 71, Number 6, September 2005
|Page(s)||994 - 1000|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||10 August 2005|
A model for steady-state luminescence of localized-state ensemble
Department of Physics and HKU-CAS Joint Laboratory on New Materials The University of Hong Kong - Pokfulam Road, Hong Kong, PRC
Corresponding author: email@example.com
Accepted: 12 July 2005
A distribution function for localized carriers, , 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 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.
PACS: 78.55.-m – Photoluminescence, properties and materials / 71.23.An – Theories and models; localized states / 78.60.-b – Other luminescence and radiative recombination
© EDP Sciences, 2005
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