Berlin 2012 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 55: Photovoltaics: Silicon-based Systems II
HL 55.2: Vortrag
Mittwoch, 28. März 2012, 11:30–11:45, ER 270
Plasmonic enhanced NIR response in thin film a-Si:H solar cells — •Florian Lükermann1, Ulrich Heinzmann1, and Helmut Stiebig2,1 — 1Molecular and Surface Physics, Bielefeld University, 33615 Bielefeld, Germany — 2Malibu GmbH & Co. KG, 33609 Bielefeld, Germany
Metal nanoparticles (NPs) exhibit Localized Surface Plasmon (LSP) resonances upon interaction with electromagnetic radiation. These LSP resonances accompany strong field enhancements in the close surroundings of the NPs.
In previous work [1] it has been shown that incorporating silver NPs in hydrogenated amorphous silicon (a-Si:H) photosensitive devices in the n-layer/i-layer configuration can yield a photocurrent for photons with energies below the a-Si:H bandgap. This photocurrent is attributed to excitation of charge carriers originating from states inside the a-Si:H bandgap which are mediated by the LSP resonances.
A distinct design of solar cell structures or photosensitive devices is necessary in order to observe this sub bandgap absorption in external quantum efficiency measurements. The talk will deal with recent results on this topic.
[1] F. Lükermann, F. Hamelmann, U. Heinzmann, H. Stiebig, 2011. Silver nanoparticles for enhanced light absorption in thin film amorphous silicon solar cells. Science Direct, Energy Procedia (in press)