Berlin 2005 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 64: Photovoltaik II
HL 64.6: Vortrag
Mittwoch, 9. März 2005, 12:00–12:15, TU P-N202
Dispersive Optical Structures for Tandemsolarcells — •A. Bielawny1, P.T. Miclea1, S.L. Schweizer1, R.B. Wehrspohn1, and S. Glunz2 — 1University of Paderborn, Department of Physics, Warburger Str. 100, D-33098 Paderborn — 2Fraunhofer Institute for Solar Energy Systems, Department: Solarcells - Materials and Technology, Heidenhofstr. 2, D-79110 Freiburg
Photovoltaic tandem solarcells are currently being developed and produced with great efficiencies but at high technological cost. The optical concept of spectrum splitting comes with the advantage of compatibility to all types of cells. Although additional optical efforts are to be made, external photon management can be achieved to fit different pv-cell combinations no matter which bandgaps involved or how the cells connect. We present an experimental set-up to compare spectral beamsplitters and dispersive media and the results obtained from measurements on a GaInP/GaInAs-system matched by means of a dielectric mirror. Initial measurements with bulk colloidal Photonic Crystals as next generation spectral splitting components are presented and possible applications in photovoltaics being discussed.