TY - JOUR
T1 - Cathodoluminescence study of SnO2 powders aimed for gas sensor applications
AU - Korotcenkov, G.
AU - Nazarov, M.
AU - Zamoryanskaya, M. V.
AU - Ivanov, M.
AU - Cirera, A.
AU - Shimanoe, K.
N1 - Funding Information:
This work was supported by the Civilian Research Development Foundation (CRDF) in the framework of CGP Program (Grant MO-E2-2588-CH-04), and by the State Committee of Science and Advanced Technology of the Republic of Moldova. Authors are thankful also to NATO (grant CLG 980670) for financial support, to Prof. J.R. Morante, A. Cornet and N. Yamazoe for interest to this research, and to Dr. V. Brinzari for useful discussions.
PY - 2006/6/15
Y1 - 2006/6/15
N2 - In this paper we report on cathodoluminescence (CL) spectra of SnO2 powders, synthesized using the wet chemical route. The analysis of influence of the modes of calcination (Tan-450-800 °C), and doping by both Pd and Pt (0.01-10.0 wt.%) on CL spectra was made. It was found that the measurement of CL spectra could be an effective research method of nanostructured metal oxides, aimed for gas sensor applications. It was established that in nanocrystalline SnO2 the same system of energy levels, associated with radiative recombination, as in single crystalline and polycrystalline SnO2, is retained. It was found that doping by both Pd and Pt modifies the structural properties of SnO2 grains. Also, there is an optimum doping; near 0.1-0.2 wt.%, at which a maximum intensity of cathodoluminescence is reached. It was concluded that for low concentrations of both Pd and Pt additives in SnO2 an improvement of the material's crystal structure is promoted, and is associated with a decrease in the non-radiating recombination rate.
AB - In this paper we report on cathodoluminescence (CL) spectra of SnO2 powders, synthesized using the wet chemical route. The analysis of influence of the modes of calcination (Tan-450-800 °C), and doping by both Pd and Pt (0.01-10.0 wt.%) on CL spectra was made. It was found that the measurement of CL spectra could be an effective research method of nanostructured metal oxides, aimed for gas sensor applications. It was established that in nanocrystalline SnO2 the same system of energy levels, associated with radiative recombination, as in single crystalline and polycrystalline SnO2, is retained. It was found that doping by both Pd and Pt modifies the structural properties of SnO2 grains. Also, there is an optimum doping; near 0.1-0.2 wt.%, at which a maximum intensity of cathodoluminescence is reached. It was concluded that for low concentrations of both Pd and Pt additives in SnO2 an improvement of the material's crystal structure is promoted, and is associated with a decrease in the non-radiating recombination rate.
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U2 - 10.1016/j.mseb.2006.03.019
DO - 10.1016/j.mseb.2006.03.019
M3 - Article
AN - SCOPUS:33846232332
SN - 0921-5107
VL - 130
SP - 200
EP - 205
JO - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
JF - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
IS - 1-3
ER -