Longi unveils heterojunction BC solar cells with 27.3% efficiency

The Chinese manufacturer said the device is based on dense passivating contacts that reduce parasitic light absorption and improve passivation. It used a streamlined manufacturing technique that is reportedly about one-third more effective than TOPCon mainstream technology. Chinese solar module manufacturer Longi has developed a heterojunction back contact (BC) solar cell using a laser-enhanced contact optimization process that reportedly has a total effective processing time of about one-third compared to that of mainstream technologies such as PERC and TOPCon. The design of the device was presented ...

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