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The result was confirmed by Germanys Hamelin Solar Energy Research Institute (ISFH). The cell also achieved an open circuit voltage of 709.5 mV, a short circuit density of 11,355 mA and a fill factor of 82.04%. The German research institute ISC Konstanz has achieved a power conversion efficiency of 24.12% for a TOPCon back-contact solar cell (TBC). The researchers said their IBC4EU solar cell was designed according to the polyZEBRA concept. The result was confirmed by Germanys Hamelin Solar Energy Research Institute (ISFH). “The certified efficiency of 24.12% turns out to be higher than that achieved with internal measurements,” ISC Konstanz researcher Jonathan Linke told pv magazine , referring to the uncertified result of 24.0% that the research group announced in December. . “It is the highest efficiency ever achieved by a solar cell produced at the ISC Konstanz.” The cell also achieved an open circuit voltage of 709.5 mV, a short circuit density of 11,355 mA and a fill factor of 82.04%. “Taking into account that the laboratory manufacturing of standard industrial cells at the ISC Konstanz relies entirely on manual handling of wafers, machines that are used for numerous cell concepts, and that screen printing is carried out in just a few tenths of cell per batch, this efficiency is already a goal,” Linke added. “Implementation of polyZEBRA technology in an automated production line is expected to result in greater than 25% cell efficiency with a lower cost of ownership compared to existing TBC cell concepts, with module efficiency that finally exceeds 24%” According to its creators, the polyZEBRA cell manufacturing process uses a unique, low-cost laser-based procedure to achieve passivated contacts in both polarities and is suitable for mass production. “The ISC team is currently optimizing individual process steps to further increase the efficiencies demonstrated in the laboratory and implement simplified process sequences to further reduce the projected costs of a future production line planned for 2025,” stated Linke. . “The development of the cell was funded by the European Unions Horizon Europe research and innovation program.” |
