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 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 research team's innovation addresses the challenges of flexibility and stability in commercializing tandem solar cells, paving the way for applications in lightweight, high-power photovoltaic scenarios such as space and automotive [2][3] Group 1: Technological Advancements - The silicon-perovskite tandem solar cell technology combines two semiconductor materials, significantly enhancing theoretical efficiency, but has faced challenges in balancing flexibility and stability [2] - The research team successfully reduced the silicon wafer thickness to 60 micrometers, allowing for flexibility with a bending radius of less than 2 centimeters without breaking [2] - A dual-layer buffer structure was developed to absorb mechanical stress while ensuring efficient charge transfer, resolving the conflict between stress buffering and high-efficiency transmission [2] Group 2: Commercialization Potential - The breakthrough in efficiency is seen as a critical point for the large-scale commercialization of automotive photovoltaic systems, potentially transforming vehicles from energy consumers to mobile power stations [3][5] - Automotive companies like BYD and Changan are actively promoting solar technology in vehicles, with BYD's solar roof technology achieving a conversion efficiency of 23.18% and enabling energy replenishment of 50 to 70 kilometers in ideal conditions [4] - The collaboration between Longi Green Energy and academic institutions is expected to accelerate the commercialization of automotive photovoltaics, with projections for broader 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]