Core Insights - Longi Green Energy has achieved a significant breakthrough in silicon-based tandem solar cell technology, with a certified efficiency of 29.8%, marking the first authoritative record for this type of cell globally [1][2] - The development of flexible silicon-perovskite tandem solar cells is expected to facilitate commercial applications in lightweight, high-power photovoltaic scenarios such as space and automotive solar energy [1][2] Group 1: Technological Advancements - The research team has successfully reduced the thickness of silicon wafers to 60 micrometers, allowing for flexibility without breaking at a bending radius of less than 2 centimeters [2] - An innovative "loose and dense" dual-layer buffer structure has been developed to address the challenges of mechanical stress and efficient charge transfer, enhancing the performance of the tandem cells [2] - Laboratory tests have shown that the small-area devices of the ultra-thin silicon-perovskite tandem solar cells have achieved an efficiency of 33.4%, certified by the National Renewable Energy Laboratory (NREL) [2] Group 2: Market Implications - The achievement of 30% efficiency is seen as a critical point for the large-scale commercialization of automotive solar energy, potentially transforming vehicles from energy consumers to mobile power stations [3] - Automotive companies like BYD and Changan are actively promoting solar energy integration in vehicles, with BYD's solar roof technology achieving a conversion efficiency of 23.18% and Changan's transparent solar body technology providing daily energy replenishment [4] - The collaboration between Longi Green Energy and academic institutions is expected to accelerate the commercialization of vehicle-mounted solar energy, with projections for widespread applications in logistics, cold chain, and emergency power supply [5]

Core Insights - Longi Green Energy Technology Co., Ltd. has developed a commercial-sized flexible tandem solar cell with an efficiency of 29.8%, certified by the Fraunhofer Institute for Solar Energy Systems, marking a world record for this type of cell [1][2] Group 1: Technology Development - The silicon-perovskite tandem solar cell technology significantly enhances theoretical efficiency by integrating two semiconductor materials, recognized as the next generation of photovoltaic technology [1] - The research team reduced the silicon wafer thickness to 60 micrometers, allowing for flexibility with a bending radius of less than 2 centimeters without breaking [1] - A dual-layer buffer structure was innovatively constructed, featuring a loose layer that absorbs mechanical stress and a dense layer that ensures efficient charge transport, resolving the conflict between stress buffering and high-efficiency transmission [1] Group 2: Product Specifications - The ultra-thin flexible tandem device, with a thickness of only 60 micrometers, achieves nearly 30% conversion efficiency, can be folded, has a bending radius of just 1.5 centimeters, weighs less than 4.4 grams, and boasts a power density of 1.77 watts per gram [2] - Laboratory small-area device efficiency has been certified by the U.S. National Renewable Energy Laboratory at 33.4% [2] Group 3: Market Implications - This breakthrough lays the foundation for the commercial development of flexible silicon-perovskite tandem solar cells in lightweight, high-power photovoltaic applications such as space and automotive solar energy [2]