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JinkoSolar improves efficiency of n-type monocrystalline TOPCon solar cell by 0.35%

Chinese solar manufacturer JinkoSolar claimed to have reached a  25.25% conversion efficiency for a large-area, n-type, TOPCon, monocrystalline-silicon cell.

The result was confirmed by China’s National Institute of Metrology and beats the company’s previous record of 24.9%, achieved in January.

“Material upgrades integrated into the cell process and fabrication on a practical size of 267.4cm2 of high-quality monocrystalline Czochralski (CZ) silicon substrates allowed the Company to achieve 25.25% cell efficiency,” the manufacturer said in a statement. “To achieve this extremely high solar cell efficiency using ultra-thin polysilicon, several advanced technologies have been implemented including JinkoSolar’s high-quality N-type wafer, passivating contact technologies, advanced diffusion system, surface passivation, metallization of crystalline solar cells and other innovative technologies.”

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In January 2020, when the cell had, still, an efficiency of 24.2%, Jinko said it was based on its HOT design and featured tunnel-oxide passivating contact (TOPCon) technology. The cell features a 267.72cm2 monocrystalline silicon substrate grown using the Czochralski method. At the time, JinkoSolar had also announced it achieved a 23.1% conversion efficiency for an n-type monocrystalline solar PV module based on this cell technology.

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Source: pv magazine