Dresden 2011 – scientific programme
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DS: Fachverband Dünne Schichten
DS 36: Plasmonics and Nanophotonics HL-I (jointly with HL and O)
DS 36.5: Talk
Wednesday, March 16, 2011, 11:15–11:30, POT 251
3D photonic crystal integrated in a mircomorph thin film silicon tandem cell — •Johannes Üpping1, Thomas Beckers2, Reinhard Carius2, Uwe Rau2, Stephan Fahr3, Carsten Rockstuhl3, Falk Lederer3, Matthias Kroll4, Thomas Pertsch4, Lorenz Steidl5, Rudolf Zentel5, and Ralf B. Wehrspohn1 — 1Institute of Physics, mikroMD, University of Halle Wittenberg — 2Institute of Energy Research, IEF-5 Photovoltaics, Forschungszentrum Jülich GmbH — 3Institute of Condensed Matter Theory and Sold State Optics, Friedrich-Schiller-Universität Jena — 4Institute of Applied Physics, Friedrich-Schiller-Universität Jena — 5Institute of Organic Chemistry, Johannes Gutenberg-Universität Mainz
A 3D photonic intermediate reflector for textured micromorph silicon tandem solar cells has been investigated. In thin-film silicon tandem solar cells consisting of amorphous and microcrystalline silicon with two junctions of a-Si/µc-Si, efficiency enhancements can be achieved by increasing the current density in the a-Si top cell. It is one goal to provide an optimized current matching at high current densities. For an ideal photon-management between top and bottom cell, a spectrally selective intermediate reflective layer (IRL) is necessary. We we present the first fully integrated 3D photonic thin-film IRL device incorporated in a state-of-the-art textured tandem solar cell. The design, the preparation and numerical calculations of a 3D self organized inverted opal photonic crystal structure in a textured micromorph tandem solar cell are presented.