Search documents

Browse topics

Document details

Localized Plasmon Assisted Scattering at the Back Contact of Thin-Film Silicon Solar Cells
U.W. Paetzold, E. Moulin, K. Bittkau, B.E. Pieters, R. Carius, U. Rau
Light Trapping, Silicon Solar Cell(s), Nanoparticle, Thin Film Solar Cell, Plasmon
Thin Film Solar Cells
Subtopic: Amorphous and Microcrystalline Silicon Solar Cells
Event: 25th European Photovoltaic Solar Energy Conference and Exhibition / 5th World Conference on Photovoltaic Energy Conversion, 6-10 September 2010, Valencia, Spain
Session: 3AV.1.54
3036 - 3041
ISBN: 3-936338-26-4
Paper DOI: 10.4229/25thEUPVSEC2010-3AV.1.54
0,00 EUR
Document(s): paper


We report on localized plasmon assisted scattering supported by Ag nanoprotrusions and Ag nanoparticles located at the back contact of thin-film silicon solar cells. The interaction of electromagnetic waves with these Ag nanostructures was simulated with a three-dimensional numerical solver of Maxwell’s equations. Scattering angle distributions and absorption profiles were calculated from the simulated electric field distribution. In state of the art μc-Si:H thin-film silicon solar cells, light of wavelengths above 550 nm reaches the back contact. For these wavelengths, localized plasmons in Ag nanoparticles and Ag nanoprotrusions positioned at the back contact are found to scatter a large fraction of the incident light to large angles at low optical losses. This way, these Ag nanostructures can serve as sub-wavelength scattering components which couple incident propagating light into the silicon absorber layer. Geometrical parameters such as radius of the Ag nanoparticles and Ag nanoprotrusions or thickness of their embedding dielectric layer (e.g. ZnO) have been optimized.