Issue |
Europhys. Lett.
Volume 71, Number 6, September 2005
|
|
---|---|---|
Page(s) | 994 - 1000 | |
Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
DOI | https://doi.org/10.1209/epl/i2005-10170-7 | |
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: sjxu@hkucc.hku.hk
Received:
3
February
2005
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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