All-inorganic CsPbI₃ perovskite solar cells (PSCs) technology is gradually maturing because of its excellent photoelectric characteristics. However, the hysteresis phenomenon induced by ion migration in the perovskite film not only seriously affects the performance of the device, but also accelerates the degradation of the film, which limits the further improvement of power conversion efficiency (PCE) for CsPbI₃ PSCs. Herein, in this paper, a new inorganic fluorine-containing additive rubidium fluoride (RbF) was introduced as a precursor additive. The incorporation of RbF effectively improved the crystallization kinetics of CsPbI₃ perovskite film and effectively suppressed the occurrence of hysteresis. The defects on the CsPbI₃ perovskite film are remarkably inhibited and the carrier dynamics process is greatly promoted with the incorporation of 0.03 mol% RbF. In addition, the non-radiative recombination is significantly suppressed, and the device stability is substantially improved. In particular, by doping 0.03 mol% RbF into the CsPbI₃, the hysteresis index of PSCs decreases to 0.003. The introduction of RbF effectively improves the device performance, and the highest efficiency has reached to 17.21%. The environmental stability has also been significantly enhanced with the RbF doping.

中文翻译：

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用于高效低磁滞全无机CsPbI3钙钛矿太阳能电池的氟化铷添加剂


全无机CsPbI ₃ 钙钛矿太阳能电池（PSC）技术因其优异的光电特性而逐渐成熟。然而，钙钛矿薄膜中离子迁移引起的滞后现象不仅严重影响器件的性能，而且加速了薄膜的降解，限制了CsPbI ₃ 钙钛矿薄膜的结晶动力学，有效抑制了滞后现象的发生。 0.03 mol% RbF的掺入显着抑制了CsPbI ₃ 钙钛矿薄膜上的缺陷，并极大地促进了载流子动力学过程。此外，非辐射复合得到显着抑制，器件稳定性显着提高。特别是，通过在CsPbI ₃ 中掺杂0.03 mol% RbF，PSC的滞后指数降至0.003。 RbF的引入有效提高了器件性能，最高效率达到17.21%。 RbF 掺杂也显着增强了环境稳定性。