Journal
PROGRESS IN PHOTOVOLTAICS
Volume 19, Issue 8, Pages 917-926Publisher
WILEY
DOI: 10.1002/pip.1135
Keywords
nanoparticle; surface plasmon; light trapping; solar cell; silicon thin film; photocurrent
Funding
- Australian Research Council
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A systematic investigation of the nanoparticle-enhanced light trapping in thin-film silicon solar cells is reported. The nanoparticles are fabricated by annealing a thin Ag film on the cell surface. An optimisation roadmap for the plasmon-enhanced light-trapping scheme for self-assembled Ag metal nanoparticles is presented, including a comparison of rear-located and front-located nanoparticles, an optimisation of the precursor Ag film thickness, an investigation on different conditions of the nanoparticle dielectric environment and a combination of nanoparticles with other supplementary back-surface reflectors. Significant photocurrent enhancements have been achieved because of high scattering and coupling efficiency of the Ag nanoparticles into the silicon device. For the optimum light-trapping scheme, a short-circuit current enhancement of 27% due to Ag nanoparticles is achieved, increasing to 44% for a nanoparticle/magnesium fluoride/diffuse paint back-surface reflector structure. This is 6% higher compared with our previously reported plasmonic short-circuit current enhancement of 38%. Copyright (C) 2011 John Wiley & Sons, Ltd.
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