Electrical conduction mechanism in ZnS nanoparticles

被引：40

作者：

Ali, Hassan ^{[1
]}

Karim, S. ^{[2
]}

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

Maaz, K. ^{[2
]}

Rahman, Atta Ur ^{[3
]}

Nisar, A. ^{[2
]}

Ahmad, M. ^{[2
]}

机构：

[1] Pakistan Inst Engn & Appl Sci, Dept Met & Mat Engn, Micro & Nano Devices Grp, Islamabad 45650, Pakistan

[2] PINSTECH, Nanomat Res Grp, Div Phys, Islamabad 45650, Pakistan

[3] Abul Wall Khan Univ, Dept Phys, Mat Lab, Mardan, Khyber Pakhtunk, Pakistan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 612卷

关键词：

Coprecipitation; Bipolaron; Conduction mechanism; AC CONDUCTION; CHALCOGENIDE GLASSES; NANOCRYSTALS; LUMINESCENCE; NANOBELTS; DEPENDENCE; FERRITES; NANORODS; BEHAVIOR; GROWTH;

D O I：

10.1016/j.jallcom.2014.05.163

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

ZnS nanoparticles with hexagonal wurtzite crystal structure have been prepared by coprecipitation method at 70 degrees C and subsequently annealed at 400 degrees C for 4 h. The average particle size has been found to be similar to 20 nm. ZnS nanopowder has been characterized by UV-Vis spectrophotometry. The band gap has been calculated in the range of 3.9 eV. Impedance spectroscopic technique has been used to examine the electrical properties of ZnS nanoparticles pressed to pellet form in the temperature range of 300 400 K. Correlated barrier hopping has been the prevailing conduction mechanism in ZnS. The activation energy calculated from the Arrhenius relation is consistent with bipolaron and single polaron hopping in correlated barrier hopping model. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：64 / 68

页数：5

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