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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 34, Number 6
JKCSEZ 34(6)
December 20, 1990 

Effect of Urea on the Rose Bengal Sensitized Photocurrent

Rose Bengal 감응 광전류에 미치는 Urea의 영향
Kil-Joong Yoon, Sung-Chul Kang, Kang-Jin Kim

윤길중, 강성철, 김강진
광전기화학쎌, ITO/SnO2/rose bengal, NaClO4/Pt을 이용하여 들뜬 rose bengal로부터 박막 반도체 SnO2의 전도띠로 주입되는 전류의 크기를 조사하였다. 초감응제로써 urea를 첨가하여 광조사 시간의 경과에 따라 광전류는 증가하다가 일정시간 후에는 계속 감소하는 특성을 나타내었다. Urea를 포함하고 있는 염료용액을 분광학적인 방법으로 분석한 결과, 광화학 반응으로 염료의 농도는 시간에 따라 감소하지만 염료회합(dye aggregation)이 전류의 증가와 관련이 있는 것으로 나타났다.

Electron injection from excited rose bengal into the conduction band of a thin film of SnO2, semiconductor was investigated in an electrochemical cell, ITO/SnO2/rose bengal, NaClO4/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.

600 - 605
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