3D Spatially Resolved PL Maps of Textured Perovskite-Silicon Tandem Cells
Robin Schot a, Tom Veeken a, Oussama Er-Raji b, Adrian Callies b, Patricia Schulze b, Albert Polman a
a AMOLF Institute, Science Park 104, Amsterdam, 1098XG The Netherlands
b Fraunhofer Institute for Solar Energy Systems, Freiburg, 79110, Germany.
International Conference on Hybrid and Organic Photovoltaics
Proceedings of International Conference on Hybrid and Organic Photovoltaics (HOPV24)
València, Spain, 2024 May 12th - 15th
Organizer: Bruno Ehrler
Poster, Robin Schot, 219
Publication date: 6th February 2024

 

In recent years, perovskite-silicon tandem solar cells have shown their potential for photovoltaic systems, with the current research-cell record power conversion being 33.9%, which was achieved by LONGi Green Energy Technology. Surface texture is an important factor for reaching these high efficiencies, as the resulting increase in incoupling efficiency enhances light absorption. In collaboration with Fraunhofer ISE, we obtained a detailed understanding of the local light-matter interactions in textured perovskite-silicon tandem cells by studying 3D spatially resolved PL maps. With a confocal laser scanning microscopy setup at AMOLF, we were able to resolve spatial variations in PL intensity and center wavelength, providing information about the underlying origin of these variations, such as photon recycling, compositional variations and laser induced changes in the film. In order to isolate and study each factor independently, several changes in excitation conditions are necessary to exclude secondary effects, such as halide segregation by the light source. 

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