The Korea Institute of Machinery and Materials (KIMM) has unveiled a groundbreaking technology for efficient hydrogen production under natural sunlight. The research team, led by Dr. Jihye Lee, developed a method to enhance the productivity of BiVO₄ photoelectrodes, crucial for solar water-splitting systems. By creating a high-concentration BiVO₄ precursor solution, the team simplified the fabrication process, significantly reducing production time by approximately 5.9 times. They also achieved the production of hydrogen solely through natural sunlight by connecting large photoelectrodes with Si solar cells, enhancing economic viability and efficiency. This advancement is expected to accelerate the transition to sustainable energy and boost the commercialization of green hydrogen production. Dr. Jihye Lee emphasized the importance of the developed technology in advancing eco-friendly energy solutions. The research team has filed for patents and published their results in a prestigious international journal. Supported by various entities, including KIMM's Basic Research Program and government ministries, this innovation marks a significant step towards more efficient and cost-effective hydrogen production. The successful development of a high-performance BiVO₄ technology showcases the potential for enhancing the sustainability and commercial viability of hydrogen as an eco-friendly energy source.