Tuesday, April 30, 2013

Self-organized broadband light trapping in thin film amorphous silicon solar cells

C Martella, D Chiappe, P Delli Veneri, L V Mercaldo, I Usatii and F Buatier de Mongeot



Nanostructured glass substrates endowed with high aspect ratio one-dimensional corrugations are prepared by defocused ion beam erosion through a self-organized gold (Au) stencil mask. The shielding action of the stencil mask is amplified by co-deposition of gold atoms during ion bombardment. The resulting glass nanostructures enable broadband anti-reflection functionality and at the same time ensure a high efficiency for diffuse light scattering (Haze). It is demonstrated that the patterned glass substrates exhibit a better photon harvesting than the flat glass substrate in p–i–n type thin film a-Si:H solar cells.



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