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1990•Journal of the Korean Chemical SocietyRequires access

Effect of Urea on the Rose Bengal Sensitized Photocurrent

Gil Jung Yun, Seong Cheol Gang, Gang Jin Kim

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Abstract

Electron injection from excited rose bengal into the conduction band of a thin film of SnO, semiconductor was investigated in an electrochemical cell, ITO/SnO/rose bengal, NaClO/Pt. It was observed that urea enhanced the supersensitized photocurrent, followed by the reduction in the photocurrent after a shallow maximum. Spectroscopic analyses of the dye solution containing urea revealed that dye aggregation appeared to be involved in the increased photocurrent, although the concentration of the dye was continuously decreased dye to photochemical reactions.

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What this paper is about

Electron injection from excited rose bengal into the conduction band of a thin film of SnO, semiconductor was investigated in an electrochemical cell, ITO/SnO/rose bengal, NaClO/Pt. It was observed that urea enhanced the supersensitized photocurrent, followed by the reduction in the photocurrent after a shallow maximum. Spectroscopic analyses of the dye solution containing urea revealed that dye aggregation appeared to be involved in the increased photocurrent, although the concentration of the dye was continuously decreased dye to photochemical reactions.

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Available abstract

Electron injection from excited rose bengal into the conduction band of a thin film of SnO, semiconductor was investigated in an electrochemical cell, ITO/SnO/rose bengal, NaClO/Pt. It was observed that urea enhanced the supersensitized photocurrent, followed by the reduction in the photocurrent after a shallow maximum. Spectroscopic analyses of the dye solution containing urea revealed that dye aggregation appeared to be involved in the increased photocurrent, although the concentration of the dye was continuously decreased dye to photochemical reactions.

Key concepts: Rose bengal, Photocurrent, Urea, Conduction band, Photochemistry, Excited state, Photoconductivity, Chemistry

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