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이중층 티타늄 전극으로 구성된 TCO-less 염료감응형 태양전지 제작에 관한 연구
심충환(Choung-Hwan Shim),김윤기(Yun-Gi Kim),김동현(Dong-Hyun Kim),이해준(Hae June Lee),이호준(Ho-Jun Lee) 대한전기학회 2011 전기학회논문지 Vol.60 No.1
Dye-Sensitized Solar Cells(DSSCs) consist of a titanium dioxide(TiO2) nano film of the photo electrode, dye molecules on the surface of the TiO2 film, an electrolyte layer and a counter electrode. But two transparent conductive oxide(TCO) substrates are estimated to be about 60[%] of the total cost of the DSSCs. Currently novel TCO-less structures have been investigated in order to reduce the cost. In this study, we suggested a TCO-less DSSCs which has titanium double layer electrodes. Titanium double layer electrodes are formed by electron-beam evaporation method. Analytical instruments such as electrochemical impedance spectroscopy, scanning electron microscope were used to evaluate the TCO-less DSSCs. As a result, the proposed structure decreases energy conversion efficiency and short-circuit current density compared with the conventional DSSCs structure with FTO glass, while internal series impedance of TCO-less DSSCs using titanium double layer electrodes decreases by 27[%]. Consequently, the fill factor is improved by 28[%] more than that of the conventional structure.
전자빔 증착법에 의한 티타늄 전극 구조 염료 태양전지 제작에 관한 연구
김윤기(Yun-Gi Kim),심충환(Choung-Hwan Shim),김현규(Hyun-Gyu Kim),성열문(Youl-Moon Sung),김동현(Dong-Hyun Kim),이해준(Hae-June Lee),박정후(Chung-Hoo Park),이호준(Ho-Jun Lee) 대한전기학회 2010 전기학회논문지 Vol.59 No.4
In general, Dye-sensitized Solar Cells(DSCs) consist of the nanocrystalline titanium dioxide(TiO₂) layer which is fabricated on a transparent conductive oxide(TCO) layer such as F/SnO₂ glass, a dye adhered to the TiO₂, an electrolyte solution and platinum-coated TCO. Among these components, two TCO substrates are estimated to be about 60% of the total cost of the DSCs. Currently novel TCO-less structures have been investigated in order to reduce the cost. In this study, TCO-less DSCs consisting of titanium electrodes were investigated. The titanium electrode is deposited on top of the porous TiO₂ layer using electron-beam evaporation process. The porosity of the titanium electrode was found out by the SEM analysis and dye adhesion. As a result, when the thickness of the titanium electrode increased, the surface resistance decreased and the conversion efficiency increased relatively.