Journal
OPTICS COMMUNICATIONS
Volume 317, Issue -, Pages 83-87Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2013.12.026
Keywords
Grating effect; Surface plasmon polaritons; Light harvesting
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In this paper, a-Si based thin film solar cells combined with front double dielectric and back triangle metallic gratings are proposed to enhance light harvesting in broadband wave range and wide-angle incident. The grating diffraction effect of front dual dielectric gratings and surface plasmon polaritons (SPPs) induced by back metal gratings promote the total optical absorption. We achieve 93.7% light absorption in TM incident and 91.4% average harvesting (on TE and TM hybrid mode) by the optimized structure in the spectrum range from 300 to 800 nm, about 20% enhancement. And the short circuit photocurrent density is up to 22.4 mA/cm(2) with 10% increase. (C) 2013 Elsevier B.V. All rights reserved.
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