Crystal family N type single crystal TOPCon battery conversion efficiency up to 24. 2%

On Jan. 25, according to the crystal issued a message that the large area of n-type single crystal TOPCon battery conversion efficiency reached a record of 24. 2%.

the test by the Chinese Academy of Sciences, solar photovoltaic power generation system and a complete quality test center leading wind power system. Using crystal cell design, N half piece of components ( 60 pieces of battery) The output in 387. The world record for the 6 w.

TOPCon technology is the preparation of a thin layer on the back of the battery tunneling oxide layer and a layer is doped polysilicon thin layer, the two jointly formed the passivation contact structure. The structure for the back of the silicon wafer provides good surface passivation, ultra-thin oxide layer can make children electron tunneling into the polysilicon layer and the Jane hole recombination, and horizontal transmission electron in polycrystalline silicon layer is metal collection, thus greatly reduce the metal contact recombination current, enhance the open circuit voltage and short circuit current of the battery.

TopCon without opening on the back and on the structure, also do not need an additional local doping process, greatly simplifies the battery production process. Compared with N - PERT batteries, TOPCon technology only need to increase the thin film deposition equipment, well compatible with the current production process, easy to upgrade of production line. Doping polycrystalline silicon layer at the same time good passivation characteristic and on the back of the metal contact all have further enhance conversion efficiency of space structure, industrialization N type high efficiency has become the next generation of the specification of the battery.