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HL: Fachverband Halbleiterphysik
HL 41: Perovskite and photovoltaics III (joint session HL/CPP)
HL 41.1: Vortrag
Mittwoch, 18. März 2020, 09:30–09:45, POT 251
Efficiency dependence on incident angle for CIGS solar cells — •Lilén Vöhringer1, Janet Neerken1, Hippolyte Hirwa1, Jörg Ohland1, Alfons Weber2, Robert Lechner2, Thomas Dalibor2, Sascha Schäfer1, and Stephan Heise1 — 1Ultrafast Nanoscale Dynamics, Institute of Physics, University of Oldenburg, D-26111 Oldenburg, Germany — 2Avancis GmbH, Otto-Hahn-Ring 6, D-81739 München, Germany
Facing climate change, renewable energies are becoming more and more relevant. Hence, understanding their mechanisms in detail is important to improve their use. In photovoltaics, solar cells are used to convert solar energy into electrical energy. In general, the efficiency of a solar cell is measured and compared under standard test conditions, which may vary vastly from real conditions. Hence, it is important to investigate the dependence of the efficiency on different parameters, in order to find the best solar cell for each case of non-standard conditions. One of these parameters is the incident angle of light, which varies according to the suns position, but also depends on the orientation of the solar cell. Its influence on the efficiency is being tested in this study for Cu(In,Ga)(S,Se)2 (CIGS) solar cells using IV-measurements. CIGS solar cells are thin-film solar cells which can reach efficiencies up to 23%. In particular, the role of the front glass for the angular-dependent efficiency is studied by investigating different front glass variations. The measurements show that the efficiency dependence on the incident angle cannot be explained by the reduced photon flux only.