In order to study on the effect of the thermal treatment on morphology and properties of Bi2Te2.7 Se0.3 thermoelectric films,two thermoelectric films were potentiostatically deposited.The phase and mor-phology were characterized by XRD and FE-SEM.Meanwhile,the thickness of films and property were de-termined by a surface profiler and a Hall effect measurement system.The XRD results showed that the as-prepared films were single-phase Bi2 Te2.7 Se0.3 compound thin films with remarkable(110)preferred orien-tation.Moreover,the SEM results indicated that thermal treatment obviously changed the morphology of the films from cabbage leaves-like morphology to little sphere-like morphology composed of nanosheets which inserted each other.In addition,the results of Hall effect measurement showed that the electrical conductivity of the as-deposited film was elevated,whereas the carrier concentrations of electrodeposited films were slightly decreased by thermal treatment.
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