Quasi-solid-state solar rechargeable capacitors based on in-situ Janus modified electrode for solar energy multiplication effect

Solar energy is one of the most appealing clean energies to replace fossil fuel. However, the low power output is the bottleneck that hinders the effective usage of solar energy. Herein, we propose quasi-solid-state solar rechargeable capacitors for solar energy multiplication effect and effective application based on Janus modified electrode. The power output of solar energy could be magnified by an integrated unit, which consists of the hydrogel electrolyte, asymmetrically lyophilic/lyophobic Janus joint electrode, and efficient perovskite solar cells. Benefiting from the unique Janus structure, the quasi-solid-state device is capable of achieving outstanding solar energy conversion, storage and utilization with large power output of 500 mW cm−2, which is about 50 times higher than that of conventional solar cells.