The study investigates the orientation-dependent properties of perovskite films with (111) and (001) preferred orientations, focusing on their bandgaps ranging from 1.53 to 1.77 eV. The (111)-oriented films exhibit electron-dominated traps, while the (001)-oriented films show hole-dominated traps, influenced by their atomic arrangements. The (111)-oriented films have lower work functions and better water/oxygen robustness compared to the (001)-oriented films. For wide-bandgap films, the (001)-oriented films allow for unobstructed ion migration, whereas the (111)-oriented films suppress ion migration and enhance phase stability. Both orientations achieve high solar cell efficiency of approximately 23%, with the (111)-oriented solar cell showing superior stability, maintaining 95% of its initial efficiency after 1500 hours of MPP tracking and 97% after 3000 hours of ambient aging. This research provides a foundation for the rational design, controllable synthesis, and targeted optimization of uniaxial-oriented perovskite films for various electronic applications.The study investigates the orientation-dependent properties of perovskite films with (111) and (001) preferred orientations, focusing on their bandgaps ranging from 1.53 to 1.77 eV. The (111)-oriented films exhibit electron-dominated traps, while the (001)-oriented films show hole-dominated traps, influenced by their atomic arrangements. The (111)-oriented films have lower work functions and better water/oxygen robustness compared to the (001)-oriented films. For wide-bandgap films, the (001)-oriented films allow for unobstructed ion migration, whereas the (111)-oriented films suppress ion migration and enhance phase stability. Both orientations achieve high solar cell efficiency of approximately 23%, with the (111)-oriented solar cell showing superior stability, maintaining 95% of its initial efficiency after 1500 hours of MPP tracking and 97% after 3000 hours of ambient aging. This research provides a foundation for the rational design, controllable synthesis, and targeted optimization of uniaxial-oriented perovskite films for various electronic applications.