NDLI: Selectivity and composition dependence of response of gas-sensitive resistors. Part 3.—Properties of the solid solution series (CrNbO4)x(Sn1 –y,SbyO2)1 –x(0 x 1, y= 0,0.01, 0.05)

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Journal of Materials Chemistry Vol - 6 Issue - 7

Journal of Materials Chemistry Vol - 6 Issue - 6

Journal of Materials Chemistry Vol - 6 Issue - 5

Journal of Materials Chemistry Vol - 6 Issue - 4

Journal of Materials Chemistry Vol - 6 Issue - 3

Journal of Materials Chemistry Vol - 6 Issue - 2

Journal of Materials Chemistry Vol -5

Journal of Materials Chemistry Vol -4

Journal of Materials Chemistry Vol -3

Selectivity and composition dependence of response of gas-sensitive resistors. Part 3.—Properties of the solid solution series (CrNbO₄)_x(Sn_{1 –y},Sb_yO₂)_{1 –x}(0 x 1, y= 0,0.01, 0.05)

Content Provider	Royal Society of Chemistry (RSC)
Author	Dusastre, Vincent Henshaw, Geoff S. Williams, David E.
Copyright Year	1996
Abstract	The response of gas-sensitive resistors fabricated from solid solution compounds of the form (CrNbO4)x(Sn1 –ySbyO2)1 –x(0 ⩽ x⩽ 1;y = 0,0.01, 0.05) to carbon monoxide, propane and water have been studied. An n-p transition occurred at a CrNbO4 stoichiometry that increased with the level of Sb5+ doping. XPS demonstrated the surface enrichment of Nb5+ in the CrNbO4 substituted compounds and a Fermi level shift of 0.6 eV between the n-type and p-type materials. The n-type compounds exhibited higher sensitivity to CO and C3H8 that the p-type compounds, which was rationalised using a compensated semiconductor conduction model in which both the energy of the surface acceptor state relative to the conduction band, and the surface acceptor state density determined the sensitivity. Both the n-type and p-type compounds exhibited a resistance decrease upon exposure to water, and this was explained in terms of the relative energies of the trap states Oads– and OHads: OHads lies higher in energy than Oads– in the n-type but lower in the p-type compounds.
Starting Page	1351
Ending Page	1354
Page Count	4
File Format	PDF
ISSN	09599428
Volume Number	6
Issue Number	8
Journal	Journal of Materials Chemistry
DOI	10.1039/JM9960601351
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Fermi Solid solution Carbon monoxide Propane Stoichiometry Dopant Fermi level Electronvolt Extrinsic semiconductor Semiconductor Valence and conduction bands
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

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Selectivity and composition dependence of response of gas-sensitive resistors. Part 3.—Properties of the solid solution series (CrNbO₄)_x(Sn_{1 –y},Sb_yO₂)_{1 –x}(0 x 1, y= 0,0.01, 0.05)

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