CuInSe2 precursor films electro-deposited directly onto MoSe2

Charles Cummings, G Zoppi, I Forbes, P J Dale, Jonathan J Scragg, Laurence M Peter, Gabriele Kociok-Kohn, Frank Marken

Research output: Contribution to journalArticle

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Abstract

Mo/MoSe2 thin film electrodes formed by selenisation of molybdenum are investigated as chemically robust substrates for the electro-deposition of InCu precursor layers for CuInSe2 (CISe) solar cell absorber films. Exposure of molybdenum films to selenium vapour at 550 degrees C produces thin and chemically robust heterostructures of Mo/MoSe2. These films exhibit the characteristics of a degenerate semi-conductor and provide close to metallic electrical conductivity for electro-deposition processes in both acidic and alkaline aqueous media. The Mo/MoSe2 films are characterised by cyclic voltammetry for the reduction of Ru(NH3)(6)(3) in aqueous 0.1 M KCl, for the reduction of 0.1 M In3+ in aqueous 0.5 M LiCl pH 3, and for the reduction of 0.1 M Cu2+ in aqueous 3 M NaOH with 0.2 M n-sorbitol. In all three cases well-defined and reversible voltammetric responses are observed. For the formation of CISe films initially In3+ is deposited potentiostatically followed by electro-deposition of Cu2+ and selenisation at 550 degrees C in selenium vapour. Mechanically stable CISe films are produced and preliminary photo-electrochemical data demonstrate the effects of changing the stoichiometry.
LanguageEnglish
Pages16-21
Number of pages6
JournalJournal of Electroanalytical Chemistry
Volume645
Issue number1
DOIs
StatusPublished - 15 Jun 2010

Fingerprint

Electrodeposition
Molybdenum
Selenium
Vapors
Sorbitol
Stoichiometry
Cyclic voltammetry
Heterojunctions
Solar cells
Thin films
Electrodes
Substrates

Keywords

  • molybdenum diselenide
  • MoSe2
  • copper indium diselenide
  • molybdenum
  • electro-deposition
  • solar cells

Cite this

CuInSe2 precursor films electro-deposited directly onto MoSe2. / Cummings, Charles; Zoppi, G; Forbes, I; Dale, P J; Scragg, Jonathan J; Peter, Laurence M; Kociok-Kohn, Gabriele; Marken, Frank.

In: Journal of Electroanalytical Chemistry, Vol. 645, No. 1, 15.06.2010, p. 16-21.

Research output: Contribution to journalArticle

Cummings, Charles ; Zoppi, G ; Forbes, I ; Dale, P J ; Scragg, Jonathan J ; Peter, Laurence M ; Kociok-Kohn, Gabriele ; Marken, Frank. / CuInSe2 precursor films electro-deposited directly onto MoSe2. In: Journal of Electroanalytical Chemistry. 2010 ; Vol. 645, No. 1. pp. 16-21.
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N2 - Mo/MoSe2 thin film electrodes formed by selenisation of molybdenum are investigated as chemically robust substrates for the electro-deposition of InCu precursor layers for CuInSe2 (CISe) solar cell absorber films. Exposure of molybdenum films to selenium vapour at 550 degrees C produces thin and chemically robust heterostructures of Mo/MoSe2. These films exhibit the characteristics of a degenerate semi-conductor and provide close to metallic electrical conductivity for electro-deposition processes in both acidic and alkaline aqueous media. The Mo/MoSe2 films are characterised by cyclic voltammetry for the reduction of Ru(NH3)(6)(3) in aqueous 0.1 M KCl, for the reduction of 0.1 M In3+ in aqueous 0.5 M LiCl pH 3, and for the reduction of 0.1 M Cu2+ in aqueous 3 M NaOH with 0.2 M n-sorbitol. In all three cases well-defined and reversible voltammetric responses are observed. For the formation of CISe films initially In3+ is deposited potentiostatically followed by electro-deposition of Cu2+ and selenisation at 550 degrees C in selenium vapour. Mechanically stable CISe films are produced and preliminary photo-electrochemical data demonstrate the effects of changing the stoichiometry.

AB - Mo/MoSe2 thin film electrodes formed by selenisation of molybdenum are investigated as chemically robust substrates for the electro-deposition of InCu precursor layers for CuInSe2 (CISe) solar cell absorber films. Exposure of molybdenum films to selenium vapour at 550 degrees C produces thin and chemically robust heterostructures of Mo/MoSe2. These films exhibit the characteristics of a degenerate semi-conductor and provide close to metallic electrical conductivity for electro-deposition processes in both acidic and alkaline aqueous media. The Mo/MoSe2 films are characterised by cyclic voltammetry for the reduction of Ru(NH3)(6)(3) in aqueous 0.1 M KCl, for the reduction of 0.1 M In3+ in aqueous 0.5 M LiCl pH 3, and for the reduction of 0.1 M Cu2+ in aqueous 3 M NaOH with 0.2 M n-sorbitol. In all three cases well-defined and reversible voltammetric responses are observed. For the formation of CISe films initially In3+ is deposited potentiostatically followed by electro-deposition of Cu2+ and selenisation at 550 degrees C in selenium vapour. Mechanically stable CISe films are produced and preliminary photo-electrochemical data demonstrate the effects of changing the stoichiometry.

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