Carrier type reversal in Pb modified Se80In20 semiconducting glassy alloys
The effective thermal conductivity (λe), effective thermal diffusivity (χe) and specific heat per unit volume (ρCp) of twin pellets of Se80In20-xPbx (x = 0, 5, 10 and 15) glasses have been measured at room temperature by using transient plane source (TPS) technique. All three parameters have been varied with Pb content and show reversal trend for 5 at. wt.% of Pb. This reversal trend can be explained on the basis of carrier type reversal as a consequence of unpinning of the Fermi level due to incorporation of Pb in Se-In glassy system.
Thermal conductivity; Thermal diffusivity; Fermi level; Carrier type reversal
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