Cathodoluminescence study of SnO2 powders aimed for gas sensor applications

G. Korotcenkov, M. Nazarov, M. V. Zamoryanskaya, M. Ivanov, A. Cirera, K. Shimanoe

研究成果: ジャーナルへの寄稿学術誌査読

15 被引用数 (Scopus)

抄録

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.

本文言語英語
ページ(範囲)200-205
ページ数6
ジャーナルMaterials Science and Engineering: B
130
1-3
DOI
出版ステータス出版済み - 6月 15 2006

!!!All Science Journal Classification (ASJC) codes

  • 材料科学一般
  • 凝縮系物理学
  • 材料力学
  • 機械工学

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