In:
Journal of Materials Research, Springer Science and Business Media LLC, Vol. 15, No. 12 ( 2000-12), p. 2690-2694
Abstract:
We investigated the photoluminescence as well as the crystal structure and optical energy gaps of the Zn 1- x Cd x Al 2 Se 4-4 x S 4 x solid solution system based on the Al-related compounds of ZnAl 2 Se 4 , ZnAl 2 S 4 , CdAl 2 Se 4 , and CdAl 2 S 4 . The single crystals of the system with 0.0 ≤ x ≤ 1.0 were grown by the chemical transport reaction technique. The Zn 1- x Cd x Al 2 Se 4-4 x S 4 x crystallizes in a defect chalcopyrite structure for a whole composition and has an optical energy gap ranging from 3.525 to 3.577 eV at 13 K. The photoluminescence spectra at 13 K showed a strong emission band in the blue spectral region and a weak broad emission band in the visible region due to donor–acceptor pair recombination. The composition and temperature dependence of these bands were examined in the investigated regions. The simple energy band scheme for the radiative mechanisms of the Zn 1- x Cd x Al 2 Se 4-4 x S 4 x is proposed on the basis of our experimental results along with photo-induced current transient spectroscopy measurements.
Type of Medium:
Online Resource
ISSN:
0884-2914
,
2044-5326
DOI:
10.1557/JMR.2000.0387
Language:
English
Publisher:
Springer Science and Business Media LLC
Publication Date:
2000
detail.hit.zdb_id:
54876-5
detail.hit.zdb_id:
2015297-8
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