Trinasolar, a global leader in smart PV and energy solutions, announced that its TOPCon-compatible hybrid back-contact (THBC) solar cell has achieved a conversion efficiency of 28.00%, verified by the Institute for Solar Energy Research Hamelin (ISFH) in Germany.

This achievement marks the first time a large-format 210R crystalline silicon cell has surpassed the 28% efficiency threshold, setting a new benchmark for mass-producible monocrystalline silicon technologies. It also marks the 39th time Trinasolar has set or broken a world record in solar cell efficiency, further consolidating Trinasolar's leadership in the industry.

 

Different from TBC, this newly launched THBC cell integrates TOPCon passivated contacts, heterojunction (HJT)-type surface passivation, and a back-contact electrode design. A hybrid high- and low-temperature passivation approach further enhances passivation performance while maintaining compatibility. In this way, THBC-based modules are intended not only to lift efficiency, but also to improve appearance and bring extra customer value in premium distributed-generation applications.

 

Designed for mass production, the THBC cell is not only compatible with 110–130 μm thin wafers but also current mainstream TOPCon production lines, offering a cost-effective upgrade pathway. Based on the existing THBC pilot line, Trinasolar is advancing the industrialization of THBC modules, with its THBC-based products to be launched soon.

 

The breakthrough is further underpinned by Trinasolar's long-term R&D investment in both TOPCon and back-contact (BC) technologies. With more than a decade of expertise in BC architectures since 2014, the company has continuously advanced cell efficiency limits through iterative innovation across multiple technology generations.

 

“In the next phase of crystalline silicon, Trinasolar will drive innovation and lead the industry development through scenarios-driven solutions enabled by TOPCon and THBC.”said Gao Jifan, Chairman of Trinasolar. “With the mission of ‘Solar energy for all', we will continue to unlock the potential of TOPCon for bifacial applications while accelerating the industrialization of THBC for high-value distributed scenarios, delivering higher efficiency and greater value to customers worldwide.”