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HL: Fachverband Halbleiterphysik

HL 5: Photovoltaic

HL 5.6: Vortrag

Montag, 23. März 2009, 11:45–12:00, POT 151

3D photonic crystal interlayers for mircomorph thin film silicon tandem cell — Andreas Bielawny¹, •Johannes Üpping¹, Paul T. Miclea¹, Ralf B. Wehrspohn¹, Carsten Rockstuhl², Falk Lederer², Marius Peters³, Lorenz Steidl⁴, Rudolf Zentel⁴, Seung-Mo Lee⁵, Mato Knez⁵, Andreas Lambertz⁶, and Reinhard Carius⁶ — ¹Institute of Physics, mikroMD, University of Halle Wittenberg — ²Institue of Physics, Solid States Optics, University of Jena — ³Freiburg Centre for Material Research, University of Freiburg — ⁴Dept. of Chemistry, Pharmacy and Earth Science, University of Mainz — ⁵Max Planck Institute of Microstructure Physics Halle — ⁶Institute of Energy Research, IEF-5 Photovoltaics, Forschungszentrum Jülich GmbH

The concept of 3D photonic intermediate reflectors for micromorph silicon tandem cells has been investigated toward first prototype cells. The reflector enhances the absorption of spectrally selected light in the top cell and decreases the current mismatch between both junctions. Our device is an inverted opal structure made of ZnO and built using self organized nanoparticles and atomic layer deposition coating methods. This 3D photonic crystal intermediate layer is less dependent of the angle of incidence than other state of the art thickness dependent massive interlayers. We present design rules, preparation and characterization of a 3D photonic thin film device. A first prototype is compared to a state of the art reference silicon tandem cell.