| Summary: | 碩士 === 國立臺灣科技大學 === 化學工程系 === 101 === This study has been carried out to investigate the new solar cell (new solar sell, NSC) system model, using different visible-light photocatalyst materials to improve the efficiency of their systems. The NSC system consists of two parts i.e. photocatalyst part (solar cell part, SCP) and modified catalyst part (fuel cell part, FCP). Photocatalyst part part, all of the visible-light photocatalyst materials were synthesized using different heat treatments, different atmospheres during thermal reduction of graphene oxide (rGO), sodium borohydride reduction to reduce Ni precursor on graphene oxide (Ni/GO) and photo-deposition of catalysts prepared by Pt/WO3. In this study, rGO material was prepared via a modified Hummer's method from graphene oxide. Catalyst part side, variation of platinum sputtering area on the FTO conductive glass surface was studied in order to reduce the electrochemical resistance and increase the overall efficiency of the system.
When visible light radiate on photocatalyst materials, electron-hole pairs will be generated. The photoelectron triggers the reduction reaction of the electrolyet and the holes participate in the photo-oxidation reaction which eventulay leads to electrical power generation. After investigation by potentio-static measurement amongst several test conditions the rGO_PtWO3_Pt II_T200_Ar gave the best result with maximum VOC (open circuit voltage) at 0.35 V observed under 0.56 cm2 reaction surface area. It is found that the Jsc (short circuit current density) and FF (fill factor) were 6.36 x 10-3 mA/cm2 and 22.1% respectively, while the PCE (photovoltaic convert efficiency) was 4.92 x 10-4 %.
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