Abstract
Plasmonic effects on metal particles are a promising way of trapping light in solar cells. We experimentally demonstrate enhanced absorptance in thin silicon using metal nanoparticle arrays in conjunction with a rear mirror. The nanoimprint process is a fast and scaleable method for producing nanoscale light trapping structures. Incorporating both nanoparticle arrays and a rear mirror leads to a substantial increase in absorptance, due to resonant interference effects. We numerically simulate a planar Ag mirror deposited onto a planarized sol-gel silicon dioxide (SiO2) layer, and show the enhancement could reach 53%. We also find that a conformal Ag mirror deposited on a sputtered SiO2 layer could give similar enhancement. Experimentally, we derive predicted Jsc enhancements of up to 2.8 mA/cm2 from absorptance measurements. The experimental results show good qualitative agreement with numerical simulations as the thickness is increased, with clear evidence of absorptance enhancement via a Fabry-Perot resonance effect.
Original language | English |
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Title of host publication | 28th European Photovoltaic Solar Energy Conference and Exhibition |
Place of Publication | Munich Germany |
Publisher | WIP-Renewable Energies |
Pages | 2678 - 2683 |
Edition | Peer Reviewed |
ISBN (Print) | 3936338337 |
DOIs | |
Publication status | Published - 2013 |
Event | 28th European Photovoltaic Solar Energy Conference and Exhibition 2013 - Paris France Duration: 1 Jan 2013 → … http://www.eupvsec-proceedings.com/ |
Conference
Conference | 28th European Photovoltaic Solar Energy Conference and Exhibition 2013 |
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Period | 1/01/13 → … |
Other | September 30-October 4 2013 |
Internet address |