Interpretation of dc and ac conductivity of Ag2O-SeO2-MoO3 glass-nanocomposite-semiconductor

被引：10

作者：

Bhattacharya, Sanjib ^{[1
]}

Kundu, Ranadip ^{[1
,2
]}

Das, Anindya Sundar ^{[2
,3
]}

Roy, Debasish ^{[2
]}

机构：

[1] Siliguri Inst Technol, Dept Engn Sci & Humanities, Darjeeeling 734009, W Bengal, India

[2] Jadavpur Univ, Dept Mech Engn, Kolkata 700032, India

[3] Regent Educ & Res Fdn, Dept Elect & Commun Engn, Kolkata 7000121, India

来源：

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS | 2015年 / 197卷

关键词：

Glass-nanocomposites; Polaron hopping; Mott's model; Greave's model; Electrical conductivity; ELECTRICAL-CONDUCTIVITY; OXIDE; CHALCOGENIDE;

D O I：

10.1016/j.mseb.2015.02.009

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A new type of semiconducting glass-nanocomposites 0.3Ag(2)O-0.7 (xMoO(3)-(1-x)SeO2) is prepared by melt-quenching route. The formation of Ag2MoO4, Ag2Mo2O7 and Ag6Mo10O33 nanoparticles and SeO3 and Seal nano clusters in glass-nanocomposites has been confirmed from X-ray diffraction (XRD) and field emission scanning electron microscopic (FESEM) studies. Fourier transform infrared (FTIR) spectroscopy is employed to find out Se-O stretching vibration as well as stretching vibrations of Mo2O72- ions. The dc conductivity of them is studied on the light of polaron hopping approach in a wide temperature range. At low temperatures, variable range hopping model (Mott's model) is employed to analyze the conductivity data. Greave's model is used to predict temperature dependent variable range hopping in the high temperature region. Frequency dependent ac conductivity is well explained on the basis of tunneling. I-V characteristics of the as-prepared samples have also been investigated. (C) 2015 Published by Elsevier B.V.

引用

页码：51 / 57

页数：7

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