Publication date: 21st July 2025
For highest efficiency potential and compatibility with industrial silicon surface texture, our work focusses on the fabrication of perovskite top solar cells that conformally coat µm-sized random pyramid silicon texture. For that purpose, the hybrid co-evaporation/ wet chemical route is applied to ensure controlled perovskite thin film formation over these relatively large silicon pyramids. Similarly, suitable deposition methods for selective contacts are chosen. Resulting perovskite interfaces to the hole and electron selective contacts are studied in detail and suitable passivation schemes are proposed. Supported by opto-electronic simulation and device characterization, we gain insights to the underlying working mechanisms and find that the large improvement in VOC and FF of the applied passivation approach at the perovskite/C60 interface is driven by a field-effect reducing interfacial recombination and increasing electron concentration within the perovskite bulk which enhances conductivity. Based on these findings, we were able to yield high open circuit voltage, closing the gap to one-step wet chemically processed tandem devices, and reach a certified power conversion efficiency of 31.6% for fully-textured perovskite/silicon tandem solar cells.
* This work was co-funded by the Fraunhofer Society within the LIGHTHOUSE PROJECT MaNiTU, by the German Federal Ministry for Economic Affairs and Climate Action under contract numbers 03EE1086A (PrEsto), 03EE1189 (LiverPool), and 03EE1222A (HyPer), as well as by the European Union within the CETPartnership program (HyPer). The authors would like to thank F. Schätzle, J. Myers, K. Zimmermann, F. Martin, and J. Zielonka for their technical support related to lab infrastructure, bottom solar cell depositions, and characterization infrastructure. * Thank you very much in advance. Kind regards, Patricia Schulze
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.