Chinese solar energy company LONGi has announced a major breakthrough in the renewable energy sector with the successful development of a new generation of tandem solar cells. According to a report by Engadget on July 18, 2026, this technology, which combines crystalline silicon and perovskite, has achieved an impressive energy conversion efficiency of 35.5%. This is considered a significant milestone in global efforts to optimize the power output of next-generation solar panels.
Detailed Developments
According to tech sources, energy company LONGi has been continuously testing new material structures to push past the efficiency limits inherent in traditional solar cells. The announcement of a 35.5% conversion efficiency demonstrates substantial improvements in the fabrication processes and structural optimization achieved by LONGi's engineers. This project not only showcases the research capabilities of the Chinese enterprise but also opens up new prospects for applying perovskite materials in the solar energy industry. Although specific timelines for large-scale commercial production have not been disclosed in detail, this move highlights LONGi's preparation to lead the next wave of energy technology.
Technical & Technological Analysis
Delving into the technical aspects, this device utilizes a crystalline silicon-perovskite tandem solar cell structure. In this architecture, two different types of semiconductor materials are stacked on top of each other to absorb sunlight simultaneously.
The perovskite layer is positioned on top to absorb short-wavelength light photons (such as blue and ultraviolet light), while the crystalline silicon layer lies underneath to absorb longer wavelengths (such as red and infrared light). This division of labor reduces energy loss as heat and maximizes the electricity generated from the same amount of incoming light. Reaching a conversion efficiency of 35.5% is a clear testament to the successful optimization of the interface between these two material layers.
Expert Opinions & Perspectives
While LONGi's announcement has garnered significant attention, technical analysts maintain a necessary degree of caution. According to industry experts, one of the biggest challenges for perovskite-containing solar cells remains their operational stability in real-world environments.
Perovskite materials are highly prone to degradation under the influence of moisture, high temperatures, and ultraviolet light. LONGi's laboratory efficiency of 35.5% is an excellent starting point, but the market will require additional independent validation reports regarding the lifespan of these cells under continuous outdoor operation before final commercial assessments can be made.
Impact & Future Outlook
The emergence of high-efficiency tandem technology like LONGi's promises to bring substantial changes to the global renewable energy market, including Vietnam. Increasing efficiency to 35.5% helps solar power projects significantly save on installation land area and the costs of structural mounting and wiring. In the context of nations striving to reduce carbon emissions, breakthroughs in solar cell efficiency will be key to accelerating the energy transition, making clean energy cheaper and more accessible to all consumers.