柔性晶硅-钙钛矿叠层电池效率创世界纪录

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]