Enecoat Technologies, a Japan-based solar innovation company, has announced a breakthrough in lead-free tin perovskite solar cell manufacturing. The research, led by Professor Atsushi Wakamiya, co-founder and chief technical advisor of Enecourt Technologies, was published in ACS Energy Letters by the American Chemical Society. The team developed a novel method using a unique additive that binds to tin atoms, delaying crystallization to about 60 seconds after coating. This process involved vacuum drying to form small crystals followed by heating to 100 degrees Celsius, evaporating the additive and achieving uniform crystal films. Conventional techniques produced around 20% blank areas without crystals, but the new approach eliminated defects and enabled full coverage. Using this method, the team created a 7.5 centimeter-square cell, a major improvement over earlier sub-1 centimeter designs, with potential scalability beyond 30 cms. Enecoat Technologies, in collaboration with Kyoto University, is targeting mass production of tin perovskite solar cells by 2030.