1. scope of application

 New energy equipment.

2. Core technologies and processes

 Using the diffused PSG layer as the phosphorus source, using the selective heating characteristics of laser, secondary doping of phosphorus is carried out at the electrode position on the front surface of the cell to form a selectively heavily doped N++ layer, which reduces the contact between the silicon wafer and the electrode. Resistance, reduce the surface recombination rate, increase the minority carrier life, improve the short-wave spectral response of light, increase the short-circuit current and the open-circuit voltage, and further improve battery efficiency. Based on PERC, a conversion efficiency improvement of 0.2%-0.3% can be achieved.

3. main technical parameters

 The highest efficiency in mass production of monocrystalline PERC double-sided batteries reaches 23.44%, and the average efficiency reaches 23.22%.

4. comprehensive benefits

 Each GW of photovoltaic power station generates an average of 1.07 billion kWh annually, saves 342,000 tce, and reduces emissions of 2.783 million tons of CO.