【摘要】：All-inorganic CsPbI_2Br perovskite solar cells(PSCs) have received extensive research interests recently.Nevertheless, their low efficiency and poor long-term stability are still obstacles for further commercial application. Herein, we demonstrate that high efficiency and exceptional long-term stability are realized by incorporating gadolinium(III) chloride(GdCl_3) into the CsPbI_2Br perovskite film. The incorporation of GdCl_3 enhances the Goldschmidt tolerance factor of CsPbI_2Br perovskite, yielding a dense perovskite film with small grains, thus the a-phase CsPbI_2Br is remarkably stabilized. Additionally, it is found that the GdCl_3-incorporated perovskite film achieves suppressed charge recombination and appropriate energy level alignment compared with the pristine CsPbI_2Br film. The noticeable increment in efficiency from14.01%(control PSC) to 16.24% is achieved for GdCl_3-incorporated PSC. Moreover, the nonencapsulated GdCl_3-incorporated PSC exhibits excellent environmental and thermal stability, remaining over 91% or90% of the original efficiency after 1200 h aging at 40% relative humidity or 480 h heating at 85 °C in nitrogen glove box respectively. The encapsulated GdCl_3-incorporated PSC presents an improved operational stability with over 88% of initial efficiency under maximum power point(MPP) tracking at 45 °C for1000 h. This work presents an effective ion-incorporation approach for boosting efficiency and long-term stability of all-inorganic PSCs.