Semiconductor sensitization by RuS2 colloids on TiO2 electrodes

doi:10.1016/0009-2614(94)01098-6

Chemical Physics Letters

Volume 229, Issues 4–5, 4 November 1994, Pages 383-388

https://doi.org/10.1016/0009-2614(94)01098-6 Get rights and content

Abstract

RuS₂ (n-type) colloids were prepared in sulfolane by a new technique. Diluted ruthenium disulfide colloidal suspension in sulfolane showed green photoluminescence. The photoelectrochemical behavior of TiO₂ electrodes coated with RuS₂ colloids was also investigated. These electrodes showed spectral sensitization effect by RuS₂ on TiO₂ with an increase in the photocurrent response of TiO₂ towards longer wavelength spectral region. Photocurrent action spectra of these electrodes qualitatively suggested a band-gap of approximately 2.2–2.8 eV for RuS₂, quite wider than that of the bulk material showing size quantization effect. I-V measurement showed a flat-band potential of ≈ −0.15 V (versus Ag/AgCl) for these samples.

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²: JSPS fellow from Department of Energy, University of Madras, India.

¹: Corresponding author.

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Semiconductor sensitization by RuS2 colloids on TiO2 electrodes

Abstract

Chem. Phys. Letters

J. Electrochem. Soc.

Surface Sci.

J. Electroanal. Chem.

Chem. Phys. Letters

J. Electroanal. Chem.

J. Cryst. Growth

J. Chem. Soc. Chem. Commun.

Ber. Bunsenges. Physik. Chem.

Chem. Rev.

J. Phys. Chem.

Semiconductor sensitization by RuS₂ colloids on TiO₂ electrodes