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TRANSPORT PROPERTIES OF Ge – Se – Te GLASSES

J. Kalužný1,* , D. Ležal1, E. Mariani2, J. Zavadil3

Affiliation

  1. Laboratory of Inorganic Materials, Institute of Inorganic Chemistry, AS CR and Institute of Chemical Technology, 250 68 PRAHA - ež, Czech Republic
  2. Department of Physics, Faculty of Material Science and Technology of the Slovak University of Technology, Paulínska 16, 917 24 TRNAVA, Slovak Republic
  3. Institute of Radio Engineering and Electronics ASCR,182 51 PRAHA 8,Chaberská 57, Czech Republic

Abstract

The temperature dependencies of direct electrical conductivity, temperature and frequency dependencies of complex permitivity and complex electrical modulus (M* = 1/ e*), have been measured in Ge0.2-Se0.8-x-Tex glasses pure and doped by Pr3+and Er 3+ (1 000 wt. ppm). On the basis of measured results it was found that these glasses exhibit only one mechanism of electrical conductivity with activation energy U = (0.95 – 0.10) eV. The results of complex electrical modulus showed, that the measured glasses are single-phase but not homogeneous, with high concentration of the point defects due to the presence of Te and they are stable up to the temperature of 180 C. The influence of chemical composition, non-stoichiometry and admixtures is usually low, because the formed compounds are in built to the glass skeleton as configurations with saturated bonds..

Keywords

Ge-Se-Te glasses, Electrical conductivity, Permitivity.

Submitted at: March 18, 2004
Accepted at: June 10, 2004

Citation

J. Kalužný, D. Ležal, E. Mariani, J. Zavadil, TRANSPORT PROPERTIES OF Ge – Se – Te GLASSES, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 2, pp. 421-427 (2004)