TITLE

Light localization at randomly textured surfaces for solar-cell applications

AUTHOR(S)
Rockstuhl, Carsten; Lederer, Falk; Bittkau, Karsten; Carius, Reinhard
PUB. DATE
October 2007
SOURCE
Applied Physics Letters;10/22/2007, Vol. 91 Issue 17, p171104
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
By using a rigorous diffraction theory, the localization of light near textured zinc oxide (ZnO) surfaces is theoretically investigated and compared with experimental data obtained from scanning-near-field-optical microscopy. Although random by nature, these surfaces show well-defined geometrical features, which cause the formation of localized light patterns near the surface. Particularly, photon jets are observed to emerge from conical surface structures. Because these structures are of primary importance for applications in photovoltaics, we analyze the “real” surface topography of textured ZnO used in silicon solar cells. With this work, valuable insight is provided into the mechanism of light coupling through randomly textured interfaces.
ACCESSION #
27371050

 

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