On November 27, the 21st China Solar Silicon & PV Power Conference (21st CSPV), the most influential annual academic event in China's silicon materials and photovoltaic power generation sector, was grandly held in Huainan, Anhui. The conference gathered over a thousand representatives from renowned domestic and international enterprises, research institutions, government departments, and industry associations to share forward-looking insights on value-chain topics, including silicon materials, solar cells, auxiliary materials and equipment, system applications, and testing and certification.
Ouyang Zi, President of the Product and Solution R&D Center at Ja Solar Technology Co., Ltd., attended the conference and delivered a presentation titled "Pathways and Prospects for Continuous Breakthroughs in PV Technology."
Ouyang noted that each development cycle in the photovoltaic industry has been accompanied by concentrated bursts of technological innovation. Whether in the evolution of wafer sizes, optimization of gridline patterns, or iterations of cell technology, critical breakthroughs often emerge in the mid-to-late stages of a cycle. Currently, the industry is in such a new phase of technological advancement.
In recent years, Ja Solar has made significant progress in TOPCon cell efficiency improvements through systematic integration and process optimization across multiple technical pathways, including front-side low-doped boron diffusion, rear-side localized Poly structures, and novel printing techniques.
In October this year, Ja Solar's next-generation flagship module, DeepBlue 5.0, officially entered mass production. With a power output of 650–670W and an efficiency of up to 24.8%, the product incorporates multi-slicing, full-screen, and CSE composite structural enhancement technologies, ensuring not only robust power generation performance but also all-weather reliability and high returns throughout its lifecycle.
While focusing on TOPCon, Ja Solar is also advancing other platform technologies. This year, the company unveiled its proprietary "Jingxian" fine grid interconnection technology, which reduces the process complexity and manufacturing costs of back-contact (BC) cells through structural innovation and material optimization, paving the way for broader BC technology adoption.
Looking further ahead, Ouyang emphasized that crystalline silicon tandem cells represent the inevitable path for photovoltaics to achieve conversion efficiencies exceeding 30%, with perovskite cells serving as a promising top-cell candidate. To this end, Ja Solar has made long-term investments and achieved multiple milestones this year. For instance, the company's commercial large-size perovskite tandem cells have reached efficiencies of 30.54% (forward scan) and 31.27% (reverse scan). Additionally, Ja Solar's R&D team has made key breakthroughs in addressing the perovskite/C interface bottleneck in inverted perovskite solar cells, with findings published in top-tier international academic journals.
As the wave of technological innovation in the photovoltaic industry continues to surge, the industry anticipates more groundbreaking, high-value achievements to emerge, injecting strong momentum into high-quality development.
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