Proceedings of 13th Conference on Hybrid and Organic Photovoltaics (HOPV21)
Publication date: 11th May 2021
The upscaling of perovskite solar cells is one of the challenges that must be addressed to pave to way for the commercial exploitation of this technology. While a large part of the upscaling efforts has been focusing on n-i-p cells, here we will show the development of highly efficient inverted solar modules based on NiOx. The first step consists of the development of an efficient P1 P2 P3 laser ablation process for the series connection of the sub-cells of a module.[1] By combining SEM-EDX analysis with a transfer length measurement, we optimized the use of a low-cost UV ns laser to provide a robust process compatible with narrow interconnections. This led to 10 cm2 minimodules with PCE of up to 15.9% on active area. To further improve in these results, we developed a novel n-side passivation of the perovskite layer that enabled the fabrication of inverted cells with NiOx with an efficiency of up to 20%, with remarkable fill factors of up to 83%. By combining the improved cell stack with the optimized interconnection, we were able to demonstrate 10 cm2 minimodules with an efficiency of up to 18.1%, the highest value reported for modules based on NiOx. Finally, we will show how electroluminescence mapping can quickly help in the characterization of the defects that can limit the performance of a perovskite module.
We gratefully acknowledge funding from the European Union’s Horizon 2020 Framework Program for funding Research and Innovation under grant agreement no. 764047 (ESPRESSO) and from the Italian Ministry of Economic Development in the framework of the Operating Agreement with ENEA for Research on the Electric System.
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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.
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