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Physics: D C .CONDUCTIVITY AND THERMOELECTRIC POWER Of a-As2Te3 FILMS

 

D C .CONDUCTIVITY AND THERMOELECTRIC POWER Of a-As2Te3 FILMS

H. Kh. Al-Lamy* Alia A. A. Shehab** Abear M. M. Ali

** Dept, of Physics. College of Science. University of Baghdad

** Dept, of Physics. College of Education. University of Baghdad

ABSTRACT

a- A2Te3 films prepared by thermal evaporation at different annealing temperature Ta in the range (303-473) K. and thickness in the range (200-350) nm .D C. Conductivity and  thermoelectric power were studied as a function of temperature for a- As2Te3 films.

Electrical conductivity of a- As2Te3  thin films decreases with increasing Ta. The activation energy Ea increases with increasing Ta. The thermoelectric power measurement confirmed that holes were predominant in the conductor process.


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