本論文主要以有限元素法討論銀奈米粒子週期結構嵌入非晶矽太陽能電池吸收層中，利用金屬粒子之侷域表面電漿來改善非晶矽在能隙時吸收低落與增加整體太陽能電池的吸收，結果證明銀奈米粒子由侷域表面電漿引起的強烈散射增強了光學吸收。我們發現整體相較於薄膜太陽能電池有約9%的增益，且在能隙附近提高了40%的效益。本論文也討論吸收層最佳化的結構，以三角晶格結構較正方晶格為佳。

This thesis numerically investigated the effect of localized surface plasmon (LSP) induced by the embedded Ag nanoparticles (NPs) in the active layer on the absorption efficiency of an entire solar cell and, especially, near the band edge of amorphous-Si (a-Si):The finite element method is used to calculate the energy absorption of the solar cell. Results showed that enhanced optical absorption results from strong scattering by LSP resonance on the embedded Ag NPs. The present solar cell structure has approximate 9% enhancement of the absorption efficiency relative to thin-film solar cell. The absorption enhancement is about 40% near the band edge. The optimal design of nanoparticles structure for active layer is also discussed; The performance of a hexagonal structure is proved better than that of a cubic structure.

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