Electrodeposition of ZnTe Compound Semiconductors from Aqueous Solution

Recycling ZnTe, CdTe, and other compound semiconductors by ambipolar electrolysis.

The electrochemical behavior of ZnTe and CdTe compound semiconductors dissolved in molten ZnCl(2) and equimolar CdCl(2)-KCl, respectively, was examined. In these melts dissolved Te is present as the divalent telluride anion, Te(2-), which was found able to be converted to elemental metal by electrochemical oxidation at the anode. ZnTe-ZnCl(2) melts were studied at 500 °C by standard electrochem...

Electrodeposition of Polypyrrole Films on Aluminum from Tartrate Aqueous Solution

A síntese eletroquímica de filmes de polipirrol em superfícies de alumínio, em meio aquoso contendo ácido tartárico e pirrol, foi realizada através da técnica galvanostática e por voltametria cíclica. Um mecanismo que considera o crescimento de uma camada porosa de óxido de alumínio em paralelo com a eletrodeposição do filme de polipirrol foi proposto. Foi observado que quanto mais homogênea a ...

Effect of pH on the Electrodeposition of ZnTe Film from a Citric Acid Solution*

Potentiostatic cathodic electrodeposition of ZnTe was investigated from the viewpoint of the effect of pH on the deposits’ composition and crystallinity using citric acidic electrolytic baths, in which Zn(II) and Te(IV) species were dissolved to form ZnH2Cit þ, ZnHCit, ZnCit , Zn(Cit)2 4 and HTeO2 þ, HTeO3 , respectively (Cit: citrate) at various pH. The complex equilibrium calculation was carr...

Cyclic Voltammetry Investigation of the Mechanism of CuInSe2 and CuIn(Al)Se2 Electrodeposition from Aqueous Solution

Electrodeposition of CuInSe2 (CIS) and CuInAlSe2 (CIAS) from aqueous solution has been systematically investigated by cyclic voltammetery implementing different scan rates. It has been shown that electrodeposited CIS and CIAS have been formed on the substrate through electrochemical-chemical interaction of reduces species on the substrate.  From the obtained results, it could be inferred that I...

Compound Semiconductors