Silicon, one of Earth's most abundant elements, has long stood at the heart of PV technology. With the ability to convert the Sun's endless energy into electricity through stable, cost-effective, and mature processes, silicon has propelled solar into the mainstream of global energy systems. Yet with each technological leap, silicon continues to unlock new possibilities, driving what DAS Solar refers to as the "silicon singularity": a turning point where scientific breakthrough reshapes industrial growth.
As one of the world's top PV module manufacturers, DAS Solar has consistently anchored its innovation in N-type technology. Since its inception, the company has committed to a future-oriented R&D strategy known as "One Core, Three Branches". With TOPCon technology as its foundation and DBC, TSiP, and SFOS architectures forming the three supporting branches, DAS Solar has created a scalable innovation system designed to push solar cell efficiency beyond today's limits and toward the 40% target.
At the core of this strategy lies DAS Solar's advanced TOPCon platform. From early-generation structures to the current TOPCon 5.0, the company has achieved industry-leading breakthroughs in cell efficiency, structural design, and material integration. TOPCon 5.0 introduces a multi-layered innovation system—from micron-scale rear-side light trapping that enhances infrared absorption, to laser-induced nanocontacts that reduce contact resistance to below 0.5 mΩ· cm². Combined with upgraded metalation, new passivation materials, and UV-resistant film layers, the technology delivers mass production cell efficiency exceeding 27%, with open-circuit voltage reaching 747 mV.
While TOPCon continues to lead the N-type race, DAS Solar is also redefining efficiency limits through its DBC (DAON back-contact) technology. As the industry nears the performance ceiling of conventional cell structures, DBC 3.0 Plus offers a new pathway. Incorporating TOPCon 5.0's tunneling oxide with a full-area passivated back-contact design, DBC 3.0 Plus achieves independently certified cell efficiency of 27.77% by CPVT. Its innovations span from ultra-precise electrode patterning and integrated hot-spot suppression, to 0BB interconnection that reduces silver usage without compromising performance. With enhanced light-trapping and UV durability, the technology provides a powerful balance of high efficiency, robust environmental adaptability, and cost-effectiveness. DAS Solar has also led or co-authored more than 20 technical standards in the back-contact domain and filed over 60 patents related to DBC cell processes, materials, and system integration, reinforcing its leadership in next-generation PV design.
Beyond crystalline silicon's theoretical efficiency limit of 29.4%, DAS Solar is pushing further with its TSiP four-terminal tandem architecture. By combining a wide-bandgap perovskite front cell with a TOPCon 5.0 rear cell, the company has developed a high-performance device that leverages the full solar spectrum. The top cell captures short-wavelength light through a highly transparent perovskite structure, while the bottom TOPCon cell harvests longer wavelengths with excellent quantum efficiency. TSiP 2.0 has already achieved module efficiency of over 26.8%, and was deployed in the 50 MW demonstration project with China Three Gorges Energy—the nation's first bifacial TOPCon tandem pilot installation—recognized as a first-of-its-kind by the National Energy Administration.
The strength of DAS Solar's "One Core, Three Branches" strategy lies not only in technical achievement, but in its capacity to form a panoramic innovation ecosystem. By building synergy across TOPCon, DBC, and TSiP, the company aligns advanced research with scenario-based applications, whether for deserts, hills, lakes, or rooftops. Each innovation feeds into a value loop that links R&D, manufacturing, and real-world performance. This system-level thinking allows DAS Solar to compete not on price alone, but on long-term value creation and differentiated market impact.
As global solar markets grow more competitive and commoditization pressures intensify, DAS Solar believes that the next era of PV leadership will belong to those who create. Through constant technological reinvention and commitment to scenario-specific product design, the company will continue advancing beyond silicon's historical limits, proving that every photon captured is not just energy, but an opportunity to redefine what solar power can achieve.
