TRANSPORT-PROPERTIES OF CUGASE2 THIN-FILMS

The electrical conductivity sigma, Hall coefficient R(H) and thermoele ctric power Q of thermally evaporated CuGaSe2 thin films with differen t thicknesses have been measured at temperatures between 80 and 480 K. These properties were also measured at room temperature for thin film s with different growth conditions. All investigated films are p-type over the whole temperature range. Electrical conduction was studied in order to establish its mechanism. The effective mass m was found to increase with increasing temperature, as a degenerate p-type semicondu ctor.