Dual-Functional Cs3Bi2Br9 for stable all-solid-state photo-rechargeable batteries.

In light of the immense potential solid-state photo-rechargeable batteries hold in the efficient utilization of renewable solar energy, there is a rapidly growing demand for materials that possess both energy harvesting and storage capabilities. In this study, a solid-state photo-rechargeable battery has been designed based on the FTO(Fluorine-doped SnO 2 transparent conductive glass)/TiO 2 /Cs 3 Bi 2 Br 9 /Pt/FTO system, which achieves dual functions of photoelectric conversion and energy storage. The inorganic bismuth-based material employed in these batteries exhibits commendable cyclic stability. Under photo-rechargeable conditions, a single cell can maintain an open-circuit voltage as high as 0.45 V in the absence of illumination. By connecting multiple cells in series, we succeed in powering an LED (Light-emitting diode) continuously for 1 min without light exposure. The findings of this research open new avenues for the design and development of novel materials that could enable highly efficient solid-state photo-rechargeable batteries. [Display omitted] • Open new avenues for the design and development of novel materials for photo-rechargeable batteries. • The inorganic Cs 3 Bi 2 Br 9 employed in these batteries exhibits commendable cyclic stability. • LED was continuously powered for 1 min. [ABSTRACT FROM AUTHOR]