| Summary: | 碩士 === 國立虎尾科技大學 === 電子工程系碩士班 === 100 === In this study, we used seed-mediate growth method to prepare the different shapes of gold nanoparticles, and applied on the photoelectrode of dye-sensitized solar cells, that explore to add different shapes the gold nanoparticles of surface plasmon resonance on the characteristics of dye-sensitized solar cells. The photoelectrode was using scraper method to prepare the TiO2/Au of composite structures. TEM analysis showed that the spherical gold nanoparticles diameter of about 45 nm, and short gold nanorods (aspect ratio of about 2.5) of the average length and width were 55 and 22 nm, and long gold nanorods (aspect ratio of about 4) of the average length and width were 55 and 14 nm. The capacity of gold nanoparticles adding in TiO2 paste is 0.1, 0.05, and 0.01 mL. The results show that the best capacity is 0.05 mL, its open circuit voltage (VOC) is 0.65 V, short circuit current (JSC) is 18.24 mA/cm2 and the photoelectric conversion efficiency (η) is 7.08 %. In addition, the long gold nanorods (aspect ratio of about 4) has the better photoelectric conversion efficiency than short gold nanorods, its open circuit voltage (VOC) is 0.66 V, short circuit current (JSC) is 18.30 mA/cm2 and the photoelectric conversion efficiency (η) is 7.29 %. Therefore, application of gold nanoparticles on the photoelectrode of dye sensitized solar cell can effectively improve the conversion efficiency more than about 1 %. The lifetime of the dye-sensitized solar cells is about two months or more, and the average photoelectric conversion efficiency is maintained at 7.20 %.
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