Spectra of low-temperature photoluminescence in thin polycrystalline CdTe films
- Authors: Polvonov B.Z.1, Yuldashev N.K.1
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Affiliations:
- Fergana Polytechnic Institute
- Issue: Vol 50, No 8 (2016)
- Pages: 1001-1004
- Section: Spectroscopy, Interaction with Radiation
- URL: https://journals.rcsi.science/1063-7826/article/view/197549
- DOI: https://doi.org/10.1134/S1063782616080194
- ID: 197549
Cite item
Abstract
The band of intrinsic (e–h) radiation emission by the subsurface potential barriers of crystal grains and the edge doublet band arising as LO-phonon replicas of the e–h band are observed in the spectra of the low-temperature (4.2 K) photoluminescence of fine-grained (with a grain size of dcr ≤ 1 µm) CdTe films. Film doping with the In impurity results in quenching of the doublet band, while heat treatment leads to activation of the intrinsic band, a short-wavelength shift of the red boundary (ΔEr = 16–29 meV) and the halfwidth modulation (ΔA = 6–17 meV) of which correlate with the height of micropotential barriers and the temperature of recombining hot photocarriers.
About the authors
B. Z. Polvonov
Fergana Polytechnic Institute
Author for correspondence.
Email: uzferfizika@mail.ru
Uzbekistan, Fergana, 150107
N. Kh. Yuldashev
Fergana Polytechnic Institute
Email: uzferfizika@mail.ru
Uzbekistan, Fergana, 150107