Seebeck Coefficient of Ternary Semiconducting Vanadium–Cobalt– Tellurite Glasses

Abstract

The Seebeck coefficient, S, of semiconducting V2O5–CoO–TeO2 bulk glasses have been measured in the temperature range 300 – 506 K. The glass samples were prepared by the press–quenching method from glass melt. The thermoelectric power, TEP, data revealed that all glasses were n–type semiconductors with Seebeck coefficient in the range from –602 to –790 μV/k. The investigations provide information on the polaron formation and the disorder energy due to random fields. The Seebeck coefficient was found to be dependent on the CoO content and the temperature independent of TEP for all glass compositions. TEP experimental results were adequately explained by Heikes’ formula.