Electrochemical deposition of nanocrystalline Bi-Te films and their characterizations

Abstract:

Galvanostatic electrochemical processes were used to electrodeposit Bi-Te binary thin films. Single-phased Bi₂Te₃ and Bi₄Te₃ films were synthesized in turn on the same electrolyte. Bi₂Te₃ thin film is composed of regular nanorods with the length up to 100 nm and average width of 10 nm, which exhibited large specific areas and would be beneficial to the application as thermoelectric materials. And the Bi₄Te₃ thin film is composed of nanoparticles which assembled greatly into irregular polyhedrons. The results of this manuscript proved that by changing the deposition parameters, it is possible to tune the phase composition and morphology of Bi-Te binary thin films.