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Journal of Nanophotonics • Open Access

Light management through guided-mode resonances in thin-film silicon solar cells

Paper Abstract

We theoretically explain and experimentally demonstrate light trapping in thin-film solar cells through guided-mode resonance (GMR) effects. Resonant field enhancement and propagation path elongation lead to enhanced solar absorption. We fabricate nanopatterned solar cells containing embedded 300-nm period, one-dimensional gratings. The grating pattern is fabricated on a glass substrate using laser interference lithography followed by a transparent conducting oxide coating as a top contact. A ∼320-nm thick p-i-n hydrogenated amorphous silicon solar cell is deposited over the patterned substrate followed by bottom contact deposition. We measure optical and electrical properties of the resonant solar cells. Compared to a planar reference solar cell, around 35% integrated absorption enhancement is observed over the 450 to 750-nm wavelength range. This light-management method results in enhanced short-circuit current density of 14.8  mA/cm 2 , which is a ∼40% improvement over planar solar cells. Our experimental demonstration proves the potential of simple and well-designed GMR features in thin-film solar cells.

Paper Details

Date Published: 6 March 2014
PDF: 14 pages
J. Nanophoton. 8(1) 083995 doi: 10.1117/1.JNP.8.083995
Published in: Journal of Nanophotonics Volume 8, Issue 1
Show Author Affiliations
Tanzina Khaleque, The Univ. of Texas at Arlington (United States)
Robert Magnusson, The Univ. of Texas at Arlington (United States)

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