Electrodeposition of ZnTe Film with High Current Efficiency at Low Overpotential from a Citric Acid Bath

Takahiro Ishizaki, Takeshi Ohtomo, Akio Fuwa

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The cathodic electrodeposition of ZnTe film was studied using an aqueous citric acid bath (pH 4; temperature 368 K) in which Zn(II) and Te(IV) species were dissolved to form Zn(Cit)24- and HTeO 2+ ions, respectively. The deposition mechanism was studied based on cyclic voltammetry. The influence of the deposition potential on the morphology, composition, and structure of the deposited film was also investigated. A smooth, dense polycrystalline ZnTe film with nearly stoichiometric composition was deposited at a constant cathode potential, ranging from -0.80 to -0.60 V vs. Ag/AgCl, from a solution containing 20 mmol dm-3 Zn(II), 0.16 mmol dm-3 Te(IV), 0.25 mol dm -3 H3Cit, and 0.25 mol dm-3 Na3Cit (Cit = C6H5O7). Potentials in this range provided the deposited ZnTe film with high current efficiency (above 98%). During electrodeposition of the nearly stoichiometric crystalline ZnTe, the current density was approximately stationary.

Original languageEnglish
Pages (from-to)C161-C167
JournalJournal of the Electrochemical Society
Volume151
Issue number3
DOIs
Publication statusPublished - 2004 Apr 14

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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