Tongwei unveils 26.03%-efficient TOPCon solar cell with high sheet resistance

Tongwei has unveiled a TOPCon solar cell made with a low-cost photoresist-based etching process that forms a selective emitter with sheet resistance up to 1,600 Ω/sq in non-contacted regions, reducing recombination losses while maintaining effective electrical contacts. The device achieved a certified power conversion efficiency of 26.03% and an open-circuit voltage of 746.5 mV.

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