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

Takahiro Ishizaki; Takeshi Ohtomo; Yusuke Sakamoto; Akio Fuwa

doi:10.2320/matertrans.45.277

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

Takahiro Ishizaki, Takeshi Ohtomo, Yusuke Sakamoto, Akio Fuwa

Research output: Contribution to journal › Article › peer-review

20 Citations (Scopus)

Abstract

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⁺, ZnHCit, ZnCit^-, Zn(Cit)₂^4- and HTeO₂⁺, HTeO ₃^-, respectively (Cit: citrate) at various pH. The complex equilibrium calculation was carried out to examine the most predominant complex ion for Zn-Cit system at different pH. Deposition of three kinds of deposits, i.e., polycrystalline ZnTe with closely stoichiometric composition, crystalline Te, and the mixed crystal due to Te and ZnTe, can be controlled by changing the pH and [Zn(II)]/[Te(IV)] concentration ratio of the baths. All the deposits obtained at pH 4.0 were well crystallized with a ZnTe cubic preferential orientation along the (111) plane without any post-treatment. The difference of the electrodeposition behavior at various pH was also discussed.

Original language	English
Pages (from-to)	277-280
Number of pages	4
Journal	Materials Transactions
Volume	45
Issue number	2
DOIs	https://doi.org/10.2320/matertrans.45.277
Publication status	Published - 2004 Feb
Externally published	Yes

Keywords

Citrate
Electrochemical deposition process
PH
Zinc telluride

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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title = "Effect of pH on the Electrodeposition of ZnTe Film from a Citric Acid Solution",

abstract = "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+, ZnHCit, ZnCit-, Zn(Cit)24- and HTeO2+, HTeO 3-, respectively (Cit: citrate) at various pH. The complex equilibrium calculation was carried out to examine the most predominant complex ion for Zn-Cit system at different pH. Deposition of three kinds of deposits, i.e., polycrystalline ZnTe with closely stoichiometric composition, crystalline Te, and the mixed crystal due to Te and ZnTe, can be controlled by changing the pH and [Zn(II)]/[Te(IV)] concentration ratio of the baths. All the deposits obtained at pH 4.0 were well crystallized with a ZnTe cubic preferential orientation along the (111) plane without any post-treatment. The difference of the electrodeposition behavior at various pH was also discussed.",

keywords = "Citrate, Electrochemical deposition process, PH, Zinc telluride",

author = "Takahiro Ishizaki and Takeshi Ohtomo and Yusuke Sakamoto and Akio Fuwa",

year = "2004",

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doi = "10.2320/matertrans.45.277",

language = "English",

volume = "45",

pages = "277--280",

journal = "Materials Transactions",

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publisher = "Japan Institute of Metals (JIM)",

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T1 - Effect of pH on the Electrodeposition of ZnTe Film from a Citric Acid Solution

AU - Ishizaki, Takahiro

AU - Ohtomo, Takeshi

AU - Sakamoto, Yusuke

AU - Fuwa, Akio

PY - 2004/2

Y1 - 2004/2

N2 - 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+, ZnHCit, ZnCit-, Zn(Cit)24- and HTeO2+, HTeO 3-, respectively (Cit: citrate) at various pH. The complex equilibrium calculation was carried out to examine the most predominant complex ion for Zn-Cit system at different pH. Deposition of three kinds of deposits, i.e., polycrystalline ZnTe with closely stoichiometric composition, crystalline Te, and the mixed crystal due to Te and ZnTe, can be controlled by changing the pH and [Zn(II)]/[Te(IV)] concentration ratio of the baths. All the deposits obtained at pH 4.0 were well crystallized with a ZnTe cubic preferential orientation along the (111) plane without any post-treatment. The difference of the electrodeposition behavior at various pH was also discussed.

AB - 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+, ZnHCit, ZnCit-, Zn(Cit)24- and HTeO2+, HTeO 3-, respectively (Cit: citrate) at various pH. The complex equilibrium calculation was carried out to examine the most predominant complex ion for Zn-Cit system at different pH. Deposition of three kinds of deposits, i.e., polycrystalline ZnTe with closely stoichiometric composition, crystalline Te, and the mixed crystal due to Te and ZnTe, can be controlled by changing the pH and [Zn(II)]/[Te(IV)] concentration ratio of the baths. All the deposits obtained at pH 4.0 were well crystallized with a ZnTe cubic preferential orientation along the (111) plane without any post-treatment. The difference of the electrodeposition behavior at various pH was also discussed.

KW - Citrate

KW - Electrochemical deposition process

KW - PH

KW - Zinc telluride

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DO - 10.2320/matertrans.45.277

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EP - 280

JO - Materials Transactions

JF - Materials Transactions

IS - 2

ER -

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

Abstract

Keywords

ASJC Scopus subject areas

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