Abstract
The success of PbTe as a thermoelectric material has generated growing interest in its charge carrier transport properties. The Boltzmann transport equation (BTE) is solved in a way which takes anisotropy, non-parabolicity, and inelastic scattering fully into account, and an inaccuracy arising from the standard treatment of phonon emission scattering is corrected. The method is used to calculate the conductivity and Hall coefficient of n-PbTe over a wide range of temperatures and doping levels, and it is found that room temperature measurements of PbTe may underestimate the true carrier concentration in some cases by a factor of 2. Experimental results on both bulk and epitaxial samples are in reasonable agreement with the predictions. A conducting p-type layer is also observed in the epitaxial films, exhibiting both persistent photoconductivity and sensitivity to air exposure.
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