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Silicon Solar Cell Light-Trapping Using Defect Mode Photonic Crystals

Whitesell, Kelsey A. and Callahan, Dennis M. and Atwater, Harry A. (2013) Silicon Solar Cell Light-Trapping Using Defect Mode Photonic Crystals. In: Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II. Proceedings of SPIE. No.8620. International Society for Optical Engineering , Bellingham, WA, Art. No. 86200D. ISBN 9780819493897.

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Nanostructured active or absorbing layers of solar cells, including photonic crystals and wire arrays, have been increasingly explored as potential options to enhance performance of thin film solar cells because of their unique ability to control light. We show that 2D photonic crystals can improve light trapping by an enhanced density of optical states and improved incoupling, and demonstrate, using FDTD simulation, absorption enhancements in 200nm thick crystalline silicon solar cells of up to 205% from λ = 300nm to 1100nm compared to a planar cell with an optimized two-layer antireflection coating. We report here a method to further enhance absorption by introducing a lattice of coupled defect modes into the photonic crystal, which modify the available optical states in the absorber. Our results show that 2D photonic crystals are a viable and rich research option for light trapping in thin film photovoltaics.

Item Type:Book Section
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Atwater, Harry A.0000-0001-9435-0201
Additional Information:© 2013 SPIE. This work was supported by the Bay Area Photovoltaics Consortium and the Caltech-Taiwan Energy Exchange program through National Central University; Kelsey A. Whitesell also acknowledges fellowship support from the National Science Foundation Graduate Research Fellowship program.
Funding AgencyGrant Number
Bay Area Photovoltaics ConsortiumUNSPECIFIED
National Central University (Taiwan)UNSPECIFIED
Caltech-Taiwan Energy Exchange ProgramUNSPECIFIED
NSF Graduate Research FellowshipUNSPECIFIED
Subject Keywords:photonic crystals, defect, silicon, solar cell, absorption, thin-film
Series Name:Proceedings of SPIE
Issue or Number:8620
Record Number:CaltechAUTHORS:20130826-090407837
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Official Citation:Proc. SPIE 8620, Physics, Simulation, and Photonic Engineering of Photovoltaic Devices II, 86200D (March 25, 2013); doi:10.1117/12.2005450
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:40917
Deposited By: Tony Diaz
Deposited On:26 Aug 2013 17:47
Last Modified:10 Nov 2021 04:23

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