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Authors: A. Abass, K. Quang Le, A. Alu, M. Burgelman, B. Maes
Title: Dual-interface gratings for broadband absorption enhancement in thin-film solar cells
Format: International Journal
Publication date: 3/2012
Journal/Conference/Book: Physical Review B
Editor/Publisher: American Physical Society, 
Volume(Issue): 85(11) p.115449
DOI: 10.1103/physrevb.85.115449
Citations: 89 ( - last update: 3/12/2023)
57 (OpenCitations - last update: 10/5/2023)
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We numerically study complex dual-interface grating systems to enhance absorption efficiency in thin-film
silicon solar cells. We combine a plasmonic grating at the back side of the solar cell with a dielectric grating at the front side of the cell. We show a proof of principle, with one-dimensional gratings, that the distinctly different nature of the gratings can provide complementary enhancement mechanisms, which we further exploit by tailoring the specific periodicities, and by introducing blazing. Having different periods at specific interfaces allows for more efficient diffraction into both plasmonic and dielectric guided modes. In addition, grating specific
blazing exposes extra modes to normal incident light through symmetry breaking. Multiple optimization routes
are possible depending on the choice of photonic phenomena.

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