Abstract
ABSTRACTThe variation of electrical conductivity and Seebeck coefficient with temperature (room temperature to 400°C.) has been studied in the case of doped lead-telluride samples. It is observed that the silver doped p-type PbTe shows more uniformity of these parameters at higher temperature than the samples generally doped with Na. The results of PbI2 doping in the case of n-type PbTe are also presented in this paper. They are in agreement with the values reported in literature.It is also observed in the process of taking measurements that the diffusion of copper via copper leads and of oxygen through surface oxide layer Changes these parameters to a great extent at higher temperatures, i.e. from 250°C. and above.
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