JinkoSolar has achieved a power conversion efficiency of 26.6 percent for an industrial scale TOPCon solar cell built on an M10 size wafer, setting a new world record for this class of technology.
The result was certified by an independent testing organisation in China and marks a significant milestone for industrial scale n type tunnel oxide passivating contact cell development. The device was developed in collaboration with researchers from the Ningbo Institute of Materials Technology and Engineering of the Chinese Academy of Sciences, together with scientists from Soochow University and Jiliang University. The findings were detailed in the journal Nature Energy.
The research team used an M10 wafer with an effective area of 313.3 square centimetres, aligning the demonstration with modern industrial production standards rather than laboratory scale formats.
On the front side of the cell, the team combined high sheet resistance boron emitters with optimised grid designs to enhance surface passivation and reduce carrier transport losses. On the rear side, researchers introduced a double layer tunnel oxide and polysilicon structure designed to mitigate metallisation induced degradation.
According to the team, the structure incorporates a highly crystalline inner polysilicon layer and an outer barrier layer that prevents silver diffusion from the electrodes into the silicon substrate. This configuration ensures strong interfacial passivation and long term device stability.
Under standard illumination conditions, the solar cell delivered an open circuit voltage of 744.6 millivolts and a fill factor of 85.57 percent, resulting in the certified 26.6 percent efficiency. By thinning the rear polysilicon layer, researchers increased bifaciality to 88.3 percent, further enhancing potential energy yield in real world applications.
Lead author Jichun Ye stated that the device has reached 83.8 percent of the theoretical efficiency limit, outperforming conventional TOPCon architectures currently deployed at scale.
Continued gains in industrial cell efficiency are expected to translate into lower levelised cost of electricity, improved land use efficiency and stronger returns on utility scale and commercial photovoltaic investments.
Author: Bryan Groenendaal
February 20, 2026
February 12, 2026
February 11, 2026
February 16, 2026
February 26, 2026
January 27, 2026
Disclaimer | Privacy Policy | Terms & Conditions | Returns Policy | Intellectual Property | Cookie Policy
© 2019 – 2026 GBA Digital Media Group. All Rights Reserved | Site Credit
Copyright Green Building Africa 2024.
Subscribe to our weekly Top 5 Stories
"*" indicates required fields
You must be logged in to post a comment.