Indian scientists at the Centre for Nano and Soft Matter Sciences (CeNS) in Bengaluru, under the Ministry of Science and Technology, have made a significant breakthrough by developing a scalable device that can produce green hydrogen using only solar energy and earth-abundant materials. Led by Dr Ashutosh K. Singh, the research team designed a unique silicon-based photoanode with a n-i-p heterojunction architecture, which enhances charge separation and transport efficiency. The device, capable of splitting water molecules to produce green hydrogen, represents a crucial step towards affordable and large-scale solar-to-hydrogen energy systems. The technology, published in the Journal of Materials Chemistry A, leverages smart materials and a thoughtful engineering approach to achieve high efficiency, durability, and cost-effectiveness. With its long-term stability and excellent performance, the device has the potential to revolutionize the energy sector, offering a sustainable solution for decarbonizing industries and powering vehicles. This innovation not only addresses the challenge of scalable and affordable green hydrogen production but also paves the way for a greener future powered by renewable energy sources.