A team of Indian scientists from the Centre for Nano and Soft Matter Sciences (CeNS) in Bengaluru, an autonomous institute of the Department of Science and Technology (DST), have made a groundbreaking achievement by developing a scalable device that produces green hydrogen through the splitting of water molecules. Green hydrogen is acknowledged as one of the cleanest fuels capable of decarbonizing industries, powering vehicles, and storing renewable energy. The team utilized solar energy and earth-abundant materials to create this innovative device, avoiding the reliance on fossil fuels or costly resources. Dr. Ashutosh K. Singh, leading the research, highlighted the device's ability to enhance performance and allow large-scale production, marking a significant step towards the realization of affordable solar-to-hydrogen energy systems. The research, published in the Journal of Materials Chemistry A, details the utilization of a sophisticated silicon-based photoanode that enhances charge separation and transport efficiency through a unique heterojunction architecture. The device exhibited remarkable stability and efficiency over extended periods, showcasing its potential for practical applications. With further development, this technology could potentially revolutionize energy production by enabling hydrogen-based energy systems powered by the sun across various sectors.