POLARIZATION IN ELECTRODEPOSITION OF A BISMUTH-TELLURIUM ALLOY FROM CHLORIDE-FLUORIDE ELECTROLYTES

Codeposition of Te and Bi from chloride-fluoride electrolytes is studi ed by cyclic voltammetry. It is shown that the alloy deposition involv es depolarization of both components. Bismuth is deposited with a high er depolarization. Alloys that are deposited at higher potentials and are richer in tellurium are n-type semiconductors, and alloys rich in bismuth are p-type semiconductors. The X-ray diffraction shows that th e produced alloys are amorphous.