| Summary: | 碩士 === 逢甲大學 === 光電學系 === 102 === In this study, the shape of silver nanostructure can be exactly controlled by combining the maskless laser interference lithography and the electrochemistry process. The silver nanostructure with various period spacing can be applied in back-reflectors of thin-film solar cell. Therefore, the solar cell with textured structure and localized surface plasmon resonance structure is formed on the top and bottom of solar cell, respectively. Therefore, the conversion efficiency of the solar cell increases.
A conversion efficiency= 3.94 % was obtained in an a-Si solar cell with spacing= 1 um one-dimension shrub-like silver nanostructure. Compared with the a-Si solar cell using flat back-reflector, the conversion efficiency effectively increases 20 %. The haze ratio and external quantum efficiency is measured. The external quantum efficiency dramatically increases at the wavelength larger than 500 nm. The haze ratio increases at the wavelength 500 nm to 580 nm due to the light-trapping effect. The increasing external quantum effect at the wavelength longer than 580 nm is due to the contribution of surface plasmon effect caused by Ag nanostructure.
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