Influence of composition on structural, electrical and optical characterizations of Bi^sub 48-x^Sb^sub x^Se^sub 52^ ternary chalcogenide system

Polycrystalline alloys of Bi^sub 48-x^Sb^sub x^Se^sub 52^ (where x = 0.6, 25, 35 and 44 at.%) were prepared by direct monotemperature technique. The surface morphology, crystalline nature and compositional analysis were studied using scanning electron microscopy, X-ray diffraction (XRD) and energy d...

Full description

Saved in:
Bibliographic Details
Published in:Indian journal of physics 2013-12, Vol.87 (12), p.1169
Main Authors: Ammar, A H, Abo Ghazala, M S, Farag, A A, M, Eleskandrany, A
Format: Article
Language:English
Subjects:
Alloys
Conductivity
Optics
Polycrystals
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Polycrystalline alloys of Bi^sub 48-x^Sb^sub x^Se^sub 52^ (where x = 0.6, 25, 35 and 44 at.%) were prepared by direct monotemperature technique. The surface morphology, crystalline nature and compositional analysis were studied using scanning electron microscopy, X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDX), respectively. The XRD patterns recorded for the Bi^sub 48-x^Sb^sub x^Se^sub 52^ showed that these materials were polycrystalline in nature. Compositional analysis by EDX technique confirmed the nearly stoichiometric structure for the prepared alloys. The dielectric properties of the samples were investigated in the frequency range (10^sup 2^-10^sup 5^ Hz). The optical measurements revealed that the Bi^sub 48-x^Sb^sub x^Se^sub 52^ alloys were direct band gap semiconductors. The activation energy and optical band gap were found to increase with increasing Sb concentration in Bi^sub 48-x^Sb^sub x^Se^sub 52^.
ISSN:0973-1458
0974-9845
DOI:10.1007/s12648-013-0352-y