The China Academy of Metrology and Science has certified the result, which Jolywood said currently represents a world record for an n-type TOPCon cell. It improves upon the company's previous record of 26.1%, which was achieved in November 2022.
The Chinese solar module maker said it achieved the new results due to its independently developed Plasma Oxidation & Plasma Assisted Insitu-doping Deposition (POPAID) technology. POPAID reportedly overcomes issues with similar doped amorphous silicon technology.
“Through continuous technological innovation, Jolywood has successfully developed various cutting-edge technologies such as impurity extraction in silicon wafer body region, a local polysilicon layer, hydrogen content regulation of polysilicon film, new metal damage repair, and ultra-fine gate line printing,” the company said. “By adopting mass production equipment and materials in the production line, Jolywood has achieved a conversion efficiency of 26.7%, pointing out a clear technical direction for the future improvement of the mass production efficiency of the TOPCon cell.”
“With this new manufacturing facility, our TOPCon solar cell production capacity has now reached 3.6GW,” a company spokesperson told pv magazine.
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