Seebeck coefficient of nanostructured phosphorus-alloyed bismuth telluride thick films

Nanostructured phosphorous-alloyed Bi2Te3 thick films have been prepared by electrochemical deposition. The average grain size of the films was calculated to be 14–26 nm based on Scherrer's equation. The effect of P on the Seebeck coefficient of the Bi2Te3 thick film was investigated. The results show that P-alloyed thick film has n-type conductivity with the Seebeck coefficient of −35 μV/K. The correlation between P site occupancy in the crystal and the Seebeck coefficient was discussed.