Temperature dependence of the absorption spectra in CdTe-doped glasses

Citation
Ml. Redigolo et al., Temperature dependence of the absorption spectra in CdTe-doped glasses, SEMIC SCI T, 14(1), 1999, pp. 58-63
Citations number
28
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
ISSN journal
02681242 → ACNP
Volume
14
Issue
1
Year of publication
1999
Pages
58 - 63
Database
ISI
SICI code
0268-1242(199901)14:1<58:TDOTAS>2.0.ZU;2-R
Abstract
We present absorption spectra as a function of temperature for CdTe quantum dots in doped glasses. We calculate the absorption spectra considering the transition energies from a spherical k.p model. We consider also the inhom ogeneous broadening due to the quantum-dot size distribution and the homoge neous broadening, due mainly to electron-phonon interactions. The samples g rown with a two-step heat treatment present very thin size distributions, w ith a standard deviation of 5.8%, which is comparable to the best CdSe samp les in the literature. Also, the results show that the homogeneous width in creases as the quantum-dot size decreases, indicating an enhancement of the electron-phonon interaction for small dots.