Schmid, M.; Lotter, E.; Lin, X.; Wang, L.; Klenk, R.; Eylers, K.; Ringleb, F.; Boeck, T.; Heidmann, B.; Nenna, G.; Loffredo, F.; Villani, F.; Köhler, T.; Sancho-Martinez, D.; Raadik, T.; Krustok, J.; Grossberg, M.; Lux-Steiner, M.Ch.: Micro Concentrator Concept for Cost Reduction and Efficiency Enhancement of Thin-Film Chalcopyrite Photovoltaics: Results from EU Joint Research Program CHEETAH. In: European Photovoltaic Solar Energy Conference and Exhibition [Ed.] : 33rd European Photovoltaic Solar Energy Conference and ExhibitionMünchen: WIP, 2017. - ISBN 3-936338-47-7, p. 1077-1080
10.4229/EUPVSEC20172017-3CV.1.48
Open Access Version
Abstract:
Results for research on chalcopyrite micro concentrator solar cells obtained within the framework of CHEETAH joint program are shown. A top-down proof of concept study reveals close to 30% relative efficiency increase under light concentration using inkjet-printed CIGSSe. A novel bottom-up approach for local chalcopyrite absorbers grown from indium islands demonstrates working CISe micro cells. Millimeter-sized lenses are fabricated from PMMA by a casting process to be applied as concentrator optics. For a combined exploitation of direct and diffuse light components an angular splitting concentrator based on chalcopyrite and kesterite absorber material is proposed. The scientific innovation brought will enrich further development of CIGSe solar cells and contribute to their relevance in photovoltaic energy production.