Chinese polysilicon and PV module manufacturer Tongwei announced it achieved a 93.08% bifaciality factor in a 770 W solar module based on tunnel oxide passivated contact (TOPCon) solar cell technology.
The result, which represents a world record for the bifacial technology, was verified by German certification body TÜV Rheinland.
The module has a power conversion efficiency of 24.8% and y temperature coefficient of -0.26%/C.
“Higher bifaciality allows the modules to generate much more power from the rear side—delivering a free energy bonus,” the manufacturer said in a statement. “For a 100 MW solar plant in Hamburg, Germany, this configuration generates an extra €180,000 ($294,786) in revenue annually compared to standard modules, unlocking an extra 81.62 million kWh of clean electricity over its lifetime.”
In July 2025, Tongwei announced it achieved 91.7% bifaciality factor in a 722 W TOPCon module.
“Reaching 95% cell bifaciality and 90% module bifaciality in mass production is a big challenge but we believe in the coming one or two years this will be possible,” the company said at the time. This result was obtained with TOPCon cell with a bifaciality of 94.3%.
The company’s researchers explained that the result was made possible by two innovations in the cell design – a selective sunken pyramid structure and a zebra-crossing passivation contact. As for the first one, it helped optimise the rear texture of the non-electrode area of the cell rear side, while the second one was reportedly able to improve the passivation of the n-type passivating contacts based on polysilicon and silicon monoxide (SiOx).
No further technical details about the technological breakthrough were revealed.
From pv magazine Global
This content is protected by copyright and may not be reused. If you want to cooperate with us and would like to reuse some of our content, please contact: [email protected].
Comments
Please login to comment
Tuesday, August 11, 2026
3:00 pm – 4:00 pm CEST, Berlin, Paris, Madrid
Thursday, July 30, 2026
4:00 pm – 5:00 pm CEST, Berlin, Paris, Madrid
Thursday, July 16, 2026
4:00 pm – 5:00 pm CEST, Berlin, Paris, Madrid
Tuesday, July 14, 2026
2:00 pm – 3:00 pm AEST, Sydney
The June issue of pv magazine Global is out now!
Available in print and digital – get your copy today!
Thursday, October 7, 2026
11:00 am – 12:30 pm CEST, Berlin, Paris, Madrid
Entries open in seven categories: Modules, Inverters, BoS, BESS, Manufacturing, Sustainability, Projects.
April 01 – August 31, 2026
You have no items in your basket.
