NIMTE Achieves 26.09% Efficiency in Industrial TOPCon Silicon Solar Cells with Reduced Silver Usage
A research team from the Ningbo Institute of Materials Technology and Engineering has achieved a power conversion efficiency of 26.09% in industrial-grade TOPCon silicon solar cells, significantly reducing silver consumption. By employing a high-precision steel-stencil printing method and a localized polysilicon structure, the team enhanced electrical contact and bifacial performance, addressing cost constraints in the photovoltaic sector. These innovations position TOPCon technology for increased efficiency and lower-cost production at scale, crucial for reducing silver demand in the industry.
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A research team from the Ningbo Institute of Materials Technology and Engineering has developed industrial-grade TOPCon silicon solar cells with a certified power conversion efficiency of 26.09%. This innovation reduces silver consumption and improves bifacial performance, addressing key cost constraints in photovoltaics.
TOPCon technology dominates over 70% of the crystalline silicon market, but high silver usage and optical losses have limited performance gains. The team introduced a high-precision steel-stencil printing method that minimizes silver paste usage by approximately 0.12 mg per watt and enhances electrical contact.
Additionally, a localized polysilicon structure on the rear side reduces optical absorption and boosts bifaciality to nearly 90%. These advancements enable higher efficiency and lower-cost production of TOPCon cells at scale, aligning with industry efforts to reduce silver demand in photovoltaic deployment.
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