We theoretically study the angular response of thin-film organic solar cells with periodic Au back nanostrips. In particular, the equation of the generalized Lambert’s cosine law for arbitrary periodic nanostructure is formulated. We show that the periodic strip structure achieves wide-angle absorption enhancement compared with the planar nonstrip structure for both the s- and p-polarized light, which is mainly attributed to the resonant Wood’s anomalies and surface plasmon resonances, respectively. The work is important for designing and optimizing high-efficiency photovoltaic cells.
© 2011 Optical Society of America
Original Manuscript: September 3, 2010
Revised Manuscript: November 26, 2010
Manuscript Accepted: December 28, 2010
Published: February 4, 2011
Wei E. I. Sha, Wallace C. H. Choy, and Weng Cho Chew, "Angular response of thin-film organic solar cells with periodic metal back nanostrips," Opt. Lett. 36, 478-480 (2011)