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Preparation of non-stoichiometric (Zn,Fe)S chalcogenides and evaluation of their thermal, optical and electrical properties

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Title Preparation of non-stoichiometric (Zn,Fe)S chalcogenides and evaluation of their thermal, optical and electrical properties
 
Creator DEULKAR, SH
BHOSALE, CH
SHARON, M
NEUMANN-SPALLART, M
 
Description Non-stoichiometric ternary chalcogenides, Zn1-xFexS, were prepared by co-precipitation of ZnS and FeS by Na2S from aqueous solutions containing FeSO4 and ZnSO4 and sintering of pellets of the co-precipitate repeatedly between 800 and 1000 degreesC. The chemical composition of the resulting solids as analyzed by XRF, EDAX, and EPMA, reflected the composition of the solutions from which precipitation was carried out, with Fe contents up to x = 0.4. X-ray diffraction indicated the presence of solid solutions, Zn1-xFexS (sphalerite). Electrical resistivity studies indicated that the compounds were semiconducting. From the temperature dependence of the resistivity, thermal bandgaps were found to be decreasing with increasing Fe content, in agreement with values on optical bandgaps as estimated from diffuse optical reflectance measurements as a function of wavelength. TEP (Thermo Electric Power) measurements indicated p-type conductivity for most samples. (C) 2003 . .
 
Publisher PERGAMON-ELSEVIER SCIENCE LTD
 
Date 2011-08-26T04:54:37Z
2011-12-26T12:57:17Z
2011-12-27T05:47:19Z
2011-08-26T04:54:37Z
2011-12-26T12:57:17Z
2011-12-27T05:47:19Z
2003
 
Type Article
 
Identifier JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS, 64(4), 539-544
0022-3697
http://dx.doi.org/10.1016/S0022-3697(02)00303-7
http://dspace.library.iitb.ac.in/xmlui/handle/10054/11198
http://hdl.handle.net/10054/11198
 
Language en