Structural, optical and transport properties of S sub(x)ZnO

In this paper, S-doped ZnO (S sub(x)ZnO) was prepared using sol-gel method at different S amounts. The structural, optical and transport properties were investigated. The introduction of S atoms into the ZnO network was found to lower the crystallization level which results in reducing the crystalli...

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Published inMaterials science in semiconductor processing Vol. 48; pp. 52 - 59
Main Authors Diba, K, Brahimia, R, Bessekhouada, Y, Tayebic, N, Traria, M
Format Journal Article
LanguageEnglish
Published 15.06.2016
Subjects
Crystallites
Doping
Materials science
Networks
Optical properties
Semiconductors
Transport properties
Zinc oxide
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Summary:In this paper, S-doped ZnO (S sub(x)ZnO) was prepared using sol-gel method at different S amounts. The structural, optical and transport properties were investigated. The introduction of S atoms into the ZnO network was found to lower the crystallization level which results in reducing the crystallite size up to x=0.3. The doping process is confirmed by the observed peak at ~610 cm super(-1) in the ATR spectrum related to the Zn-S linking. EDX mapping shows a homogeneous distribution of S atoms on the particles surface. The best compromise between the band gap (Eg=2.96 eV), the charge carriers (N sub(A)=2.13910 super(22) cm super(-3)), the conductivity ( sigma =5.5610 super(-4) Omega super(-1) m super(-1)) and the mobility ( mu =16.2610 super(-14) m super(2) V super(-1) s super(-1)) is obtained for x=0.1. The conduction mechanism is assumed by small hopping polaron. The S-doping has impacted positively the photocatalytic activity of ZnO, with particularly high performance for S sub(0.2)ZnO.
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ISSN:1369-8001
DOI:10.1016/j.mssp.2016.03.010