The German Fraunhofer Institute for Systems and Innovation Research ISI has developed a new design for producing hydrogen using sunlight, known as the photoelectrochemical (PEC) process. This innovative approach uses semiconductors in a tandem PEC module, which combines solar energy absorption and hydrogen production in one unit. The module absorbs short-wavelength light on one side and long-wavelength light on the other, separating hydrogen and oxygen during generation. Researchers coated glass with semiconducting materials, enhancing hydrogen yield through ultra-gentle coating methods. This compact, modular solution generates over 30 kilograms of hydrogen per year per 100 square meters under European sunlight conditions, offering a robust and scalable alternative for flexible hydrogen generation.
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