The 7th international workshop on silicon heterojunction solar cells has taken place at the University of Catania in Italy, attracting experts from around the world to discuss the high potential of heterojunction (HJT) photovoltaic technology. Dr. Wenjing Wang, Huasun Energy’s chief scientist and Jiehua Tian, head of the company’s product development and management centre, participated as guest speakers, sharing Huasun’s achievements in HJT R&D and the unique advantages of its HJT products.
The HJT “Golden Triangle”: Driving Photovoltaic Innovation
Over the past four years, Huasun has made significant upgrades in HJT technology, through iterations from 1.0, 2.0 to 3.0. Dr. Wang highlighted that HJT is now at a pivotal stage of supply chain integration and that, by integrating HJT-specific ingot, wafer, cell and module production, the company is advancing collaboration and synergy across the entire value chain.
In terms of silicon utilization, Huasun pioneers ingot half-cutting and maximizes the value of edge materials, while its HJT-specific ingot layout promotes efficient use of silicon. Advanced cell production processes, like bifacial microcrystalline and copper paste integration, reduce costs and improve efficiency, forming a solid foundation for high-quality cell production. In terms of module manufacturing, the company adopts light conversion film and butyl rubber encapsulation, enhancing resistance to moisture and light degradation, which supports long-term system performance.
Dr. Wang emphasized the core strengths of HJT—reliability, high efficiency and cost-effectiveness, representing the technology’s “Golden Triangle”. A number of cutting-edge technologies have successfully transitioned from laboratory to mass production, showing early commercial success.
Data-Driven Proof: HJT’s Leading Performance
Jiehua Tian compared HJT 630W, TOPCon 610W, and BC 650W modules, using field data from Haikou (South China), Yinchuan (Northwest China) and Mohe (Northeast China), the comparison highlighting HJT’s superior power output across diverse climates and latitudes.
Under identical conditions, HJT’s high bifaciality, superior low-light performance and better temperature coefficient deliver greater power gains, data indicating that HJT modules outperformed BC equivalents, with average gains of 3.02% in Haikou, 1.96% in Mohe and 1.84% in Yinchuan—results that translate into higher returns, particularly for large-scale power plants.
With 20 GW of annual production capacity, Huasun has already supplied over 8 GW of HJT products to more than 60 countries and regions and is committed to scaling production and applications to become a global leader in heterojunction manufacturing.
