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학술지 The Effect of a Sol-gel Formed TiO2 Blocking Layer on the Efficiency of Dye-sensitized Solar Cells
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저자
조태연, 윤순길, S. S. Sekhon, 강만구, 한치환
발행일
201110
출처
Bulletin of the Korean Chemical Society, v.32 no.10, pp.3629-3633
ISSN
0253-2964
출판사
대한화학회 (KCS)
DOI
https://dx.doi.org/10.5012/bkcs.2011.32.10.3629
협약과제
11MB3500, 투명전도성 기판 대체구조 태양전지 개발, 강만구
초록
The effect of a dense TiO2 blocking layer prepared using the sol-gel method on the performance of dyesensitized solar cells was studied. The blocking layer formed directly on the working electrode, separated it from the electrolyte, and prevented the back transfer of electrons from the electrode to the electrolyte. The dyesensitized solar cells were prepared with a working electrode of fluorine-doped tin oxide glass coated with a blocking layer of dense TiO2, a dye-attached mesoporous TiO2 film, and a nano-gel electrolyte, and a counter electrode of Pt-deposited FTO glass. The gel processing conditions and heat treatment temperature for blocking layer formation affected the morphology and performance of the cells, and their optimal values were determined. The introduction of the blocking layer increased the conversion efficiency of the cell by 7.37% for the cell without a blocking layer to 8.55% for the cell with a dense TiO2 blocking layer, under standard illumination conditions. The short-circuit current density (J sc) and open-circuit voltage (Voc) also were increased by the addition of a dense TiO2 blocking layer.
키워드
Blocking layer, Dye-sensitized solar cell, High efficiency, Photo anode, Sol-Gel method
KSP 제안 키워드
Conversion efficiency(C.E.), Dye-sensitized solar cells(DSCs), Gel processing, Heat treatment temperature, Illumination conditions, J sc, Layer formation, Open circuit voltage(VOC), Oxide glass, Photo anode, Processing conditions