Electrodeposition of Bi 2Te 3 films from ammoniacal basic solutions containing nitrilotriacetic acid

Yasuhiro Ishimori, Takahiro Ishizaki, Takeshi Ohtomo, Akio Fuwa

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    Bi 2Te 3 thin films were electrochemically deposited from ammonia-alkaline solution containing Bi(NO 3) 3, TeO 2, nitrilotriacetic acid (NTA), in which Bi (III) - and Te (IV) -species were dissolving to form Bi (NTA) 2 3- complex and TeO 3 2-, respectively. This study revealed the relationship between [Bi]/[Te] ratio in the solution and the respective metal ratio in the deposited film. The [Bi]/[Te] ratio of the deposited film was successfully controlled by conducting electrodeposition under diffusion-limited conditions, i.e. the [Bi]/[Te] ratio in the solution was linearly related to that of the deposited film, where the partial current density originating from bismuth and tellurium ion was directly proportional to the concentration of respective ions. Dense and crystalline Bi 2Te 3 thin films with stoichiometric composition were electrodeposited at the potential ranging from - 0.6 to - 0.8 V from 5.0 × 10 -3 kmol m -3 Bi(NO 3) 3·5H 2O, 3.0 × 10 -3 kmol m -3 TeO 2 and 0.1 kmol m -3 NTA solution, with cathodic current efficiencies being above 85%.

    Original languageEnglish
    Pages (from-to)406-411
    Number of pages6
    JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
    Volume68
    Issue number6
    DOIs
    Publication statusPublished - 2004 Jun

    Fingerprint

    Nitrilotriacetic Acid
    Electrodeposition
    electrodeposition
    acids
    Acids
    Tellurium
    Ions
    Thin films
    Bismuth
    tellurium
    thin films
    Ammonia
    bismuth
    ammonia
    dissolving
    ions
    Current density
    Metals
    current density
    Crystalline materials

    Keywords

    • Bismuth telluride
    • Electrodeposition
    • Nitrilotriacetic acid

    ASJC Scopus subject areas

    • Metals and Alloys

    Cite this

    Electrodeposition of Bi 2Te 3 films from ammoniacal basic solutions containing nitrilotriacetic acid. / Ishimori, Yasuhiro; Ishizaki, Takahiro; Ohtomo, Takeshi; Fuwa, Akio.

    In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 68, No. 6, 06.2004, p. 406-411.

    Research output: Contribution to journalArticle

    Ishimori, Yasuhiro ; Ishizaki, Takahiro ; Ohtomo, Takeshi ; Fuwa, Akio. / Electrodeposition of Bi 2Te 3 films from ammoniacal basic solutions containing nitrilotriacetic acid. In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals. 2004 ; Vol. 68, No. 6. pp. 406-411.
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