Dr. Jihye Lee and her research team at the Nano-lithography & Manufacturing Research Center at KIMM have made a significant breakthrough in solar-powered hydrogen production technology. They developed a technique to enhance the productivity of BiVO₄ photoelectrodes, a key material for solar water electrolysis systems, by creating a high-concentration precursor solution. This solution simplifies the fabrication process, reducing it to a one-step spin coating procedure, which significantly boosts productivity. The team also managed to connect large photoelectrodes to form an ultra-large electrode system, enabling the production of hydrogen solely using natural sunlight and without external power sources. This innovation not only streamlines the production process but also contributes to the acceleration of sustainable energy transition and the commercialization of green hydrogen production. The team's achievements have been published in the Journal of Materials Chemistry A, and they have filed for patents to protect their technology.