Direct utilization of abundantly available solar energy is a promising way to create a sustainable society. Here, we report a ferroelectric-semiconductor (BaTiO₃@BiVO₄) hybrid that uses an effective strategy to enhance charge separation and transfer during water oxidation. The tetragonal BaTiO₃ can induce an outward vector of built-in electric field after positive polarization, which aids in increasing the photovoltage and accelerating holes’ transfer to BiVO₄’s surface. A super-hygroscopic metal hydrogel serves as an atmospheric humidity harvester for continuous water supply to the hybrid, where water oxidation takes place. As the hydrogel absorbs moisture from ambient humid air, it functions as a dehumidifying agent and carries water to the photoanode for power generation, being connected in series with a solar cell, further boosting the carrier’s mobility. This photoanode-hydrogel and solar-cell intelligent assembly can generate a photocurrent of 0.4 mA/cm² with a relative humidity reduction of 12.0% under an illumination of 10 mW/cm².

直接利用丰富可用的太阳能是建立可持续社会的一种有前途的方式。在这里，我们报告了一种铁电半导体（BaTiO ₃ @BiVO ₄）杂化物，该杂化物使用有效的策略来增强水氧化过程中的电荷分离和转移。正方极化后的BaTiO ₃可以诱导内建电场的向外矢量，这有助于增加光电压并加速空穴向BiVO ₄的转移。的表面。超级吸湿的金属水凝胶可作为大气湿度收集器，用于持续向发生水氧化的杂化体供水。当水凝胶吸收周围潮湿空气中的水分时，它起到除湿剂的作用，并将水带到光阳极进行发电，与太阳能电池串联连接，从而进一步提高了载体的移动性。该光阳极-水凝胶和太阳能电池智能组件可以在10 mW / cm ²的光照下产生0.4 mA / cm ²的光电流，相对湿度降低12.0％。