溴化铷对CsPbBr₃钙钛矿太阳能电池性能的协同效应

CsPbBr 3 perovskite solar cells (PSCs) have garnered significant interest because of their remarkable long-term stability and straightforward manufacturing process in humid conditions. Ion movement inside the perovskite film induces hysteresis, adversely affecting device performance and facilitating film degradation. This limits the future enhancement of power conversion efficiency (PCE) in CsPbBr 3 PSCs. This study presents a new inorganic fluorine-containing additive, rubidium bromide (RbBr), as a precursor. The incorporation of RbBr into the CsPbBr 3 perovskite film improved crystallisation kinetics and decreased hysteresis. The addition of 0.04 M RbBr effectively suppresses defects in the CsPbBr 3 perovskite layer and substantially improves carrier dynamics. Furthermore, there is a large reduction in non-radiative recombination, resulting in a substantial improvement in device stability. Moreover, a notable decrease in non-radiative recombination has been observed, resulting in a substantial improvement in device stability. The incorporation of 0.04 RbBr into CsPbBr 3 leads to a decrease in the hysteresis index of PSCs to 0.016. The incorporation of RbBr significantly improves device performance, attaining an optimal efficiency of 8.11%. The enhancement of environmental stability has been markedly achieved with RbBr doping.