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Study on Advanced Photo Anode and Solid Electrolyte in Dye-sensitized Solar Cells

Author: LiGuo
Tutor: HuZhiQiang
School: Dalian University of Technology
Course: Materials Science
Keywords: CuAl2O4 dope composite film dye-sensitized CuSCN solidelectrolyte
CLC: TM914.4
Type: Master's thesis
Year: 2008
Downloads: 4
Quote: 0
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Abstract


CuAl2O4nano-powders are prepared by the amorphous citrate process. It is doped inTiO2powder and CuAl2O4/TiO2com posite film electrodes are prepared on ITO glasssubstrate by screen printing method, then look forward to obtain photoelectrodes of DSSCwhich have favorable photoelectric properties.CuSCN nano-particles are prepared in CuSO4solution by liquid-phase precipitation method. CuSCN thin films are prepared on Pt counterelectrode by electro-deposition method. Further CuSCN nano-particles are put betweenCuAl2O4/TiO2composite film electrode and CuSCN thin film. The effects of processingparameters on properties of CuAl2O4/TiO2composite film electrodes are studied andmechanism of composite film is discussed fundamentally. Voltage-current characteristic ofsolid dye-sensitized solar cells is measured and the best condition of deposition is confirmed.Crystal structure of CuAl2O4and CuSCN nano-powder are analyzed by means of XRD.Furthermore, various influencing factors to govern the photoelectric properties ofCuAl2O4/TiO2composite film electrodes and solid dye-sensitized solar cells have beeninvestigated.The result shows: Precursors can be prepared at300℃by3℃/min,60min heatpreservation, then at900℃by7℃/min,120min heat preservation, cooling spontaneously, sowe can acquire CuAl2O4nano-powder. TiO2composite films doped with CuAl2O4nano-powders are superior in surface morphology, thickness and visible light responsiveregion. When the content of CuAl2O4is1%, composite film electrodes have preferablephotoelectric properties. Compared with pure TiO2film electrode, Voc, Jsc, η separatelyincrease6.97％,21.98％,40％. When deposition potential is-30mV and deposition time is30min, solid dye-sensitized solar cells have preferable photoelectric properties. Voc, Jsc, ηseparately is0.41V,0.30mA,0.36%. Although properties of the solid dye-sensitized solarcells are hardly ideal, they has low manufacturing cost and not give rise to dyes degradation.

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CLC: > Industrial Technology > Electrotechnical > Independent power supply technology (direct power) > Photocell > Solar cells
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