Influence of composition on structural, electrical and optical characterizations of Bi48-xSb xSe52 ternary chalcogenide system

被引：7

作者：

Ammar, A. H. ^{[1
,2
]}

Ghazala, M. S. Abo ^{[3
]}

Farag, A. A. M. ^{[1
]}

Eleskandrany, A. ^{[4
]}

机构：

[1] Ain Shams Univ, Fac Educ, Dept Phys, Cairo 11757, Egypt

[2] Taibah Univ, Fac Sci & Arts, Dept Phys, Al Ula, Medina, Saudi Arabia

[3] Menoufia Univ, Fac Sci, Dept Phys, Shibin Al Kawm, Egypt

[4] Taiz Univ, Fac Sci Appl, Dept Phys, Taizi, Yemen

来源：

INDIAN JOURNAL OF PHYSICS | 2013年 / 87卷 / 12期

关键词：

Polycrystalline alloys; Bi48-xSbxSe52; Optical absorption; Electrical conductivity; Dielectric properties; DIELECTRIC-RELAXATION BEHAVIOR; AC CONDUCTIVITY; MECHANISM; BI2SE3; ENERGY;

D O I：

10.1007/s12648-013-0352-y

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Polycrystalline alloys of Bi48-x Sb (x) Se-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 Bi48-x Sb (x) Se-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(2)-10(5) Hz). The optical measurements revealed that the Bi48-x Sb (x) Se-52 alloys were direct band gap semiconductors. The activation energy and optical band gap were found to increase with increasing Sb concentration in Bi48-x Sb (x) Se-52.

引用

页码：1169 / 1175

页数：7

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