應用於太陽能電池光吸收之奈米光學結構

Nanophotonic Structures for Light Absorption of Solar Cells

葉永銘(Yung-Ming Yeh)

指導教授 ： 李佳翰

國立臺灣大學/工學院/工程科學及海洋工程學研究所/碩士(2010年)

https://doi.org/10.6342/NTU.2010.02164

摘要

近年來，許多研究結果證實金屬奈米粒子的散射性質可以增加薄膜太陽能電池之光吸收。我們結合介電物質與金屬物質之奈米粒子，在矽基材上形成緊密排列之結構，來提升能量的穿透且增強薄膜太陽能電池之光吸收。當小銀奈米粒子與大二氧化矽奈米粒子的半徑比例達二分之一時，將可獲取最佳提升之能量穿透。此緊密排列結構之大二氧化矽奈米粒子與小銀奈米粒子比單一二氧化矽奈米粒子或銀奈米粒子可得到較佳之增強效果。在我們設計的奈米粒子結構上，發現非貴金屬類的材料如鋁、銅等，也可以有不錯的能量穿透增益效果。我們提出合適的奈米粒子結構，增強能量的穿透且增加薄膜太陽能電池之光吸收。

關鍵字

太陽能電池 ； 奈米粒子 ； 散射 ； 光吸收 ； 緊密排列結構

並列摘要

Recently, many research results have shown that the metal nanoparticles can increase light absorption in thin film solar cells because of their scattering property. We study the combination of dielectric and metallic nanoparticles, which have the form of close packed structure upon silicon substrate, to enhance energy transmission and increase light absorption in thin film solar cells. As the radius ratios of small silver to large silica nanoparticles become half, the maximal increase of energy transmission is obtained. The close packed structure of large silica nanoparticles with small silver nanoparticles among certain range of radius ratios get better enhancement than the periodic structure of silica or silver nanoparticles. It is also good enhancement of energy transmission for non noble metals such as aluminum and copper. Furthermore, we can apply these results to enhance the energy transmission and increase the light absorption of solar cells.

並列關鍵字

solar cells ； nanoparticles ； scattering ； optical absorption ； close packed structure

參考文獻

[1] M. A. Green, Third Generation Photovoltaics (Springer, Berlin, 2003).

[2] M. A. Green, Solar Cells: Operating Principles, Technology and System Applications (The University of New South Wales, Sydney, 1998).

[3] K. R. Catchpole and A. Polman, “Plasmonic solar cells,” Opt. Exp., vol. 16, no. 26, pp. 21793–21800 (2008).

[4] H. A. Atwater and A. Polman, “Plasmonics for improved photovoltaic devices,” Nature Mater., vol. 9, pp. 205–213 (2010).

[5] B. P. Rand, P. Peumans, and S. R. Forrest, "Long-range absorption enhancement in organic tandem thin film solar cells containing silver nanoclusters," J. Appl. Phys., vol. 96, p. 7519, (2004).