Chinese PV module maker Longi has announced it has achieved a power conversion efficiency of 26.12% for a gallium-doped, p-type heterojunction (HJT) solar cell based on an M6 wafer.
The cell also achieved an open-circuit voltage of 750.2 mV, a short-circuit current of 11,271 mA, and a fill factor of 84.76%. The result was confirmed by the Institute for Solar Energy Research (ISFH) in Hamelin, Germany.
Longi achieved an efficiency of 25.47% for the same solar cell in March. The company said the performance enhancement was due to an improvement in the passivation process without providing further details.
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The Chinese manufacturer also achieved an efficiency of 26.5% for a n-type heterojunction cell in June and a 25.19% rating for its p-type TOPCon solar cell in July 2021. In June 2021, it recorded a 25.21% efficiency rating for an n-type TOPCon device.
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