Abstract: MXenes, a new and intriguing family of two-dimensional (2D) materials, have recently attracted considerable attention owing to their excellent properties such as high electrical conductivity and mobility, tunable structure, and termination groups. In this study, Ti₃C₂T_x (a typical MXene material) was incorporated as an interface modification layer between the electronic transport layer and the perovskite absorber layer of perovskite solar cells, with the aim of efficiency enhancement. Results show that the average grain size of the perovskite increased from 0.46 to 1.16 μm after the introduction of Ti₃C₂T_x compared with the pristine sample, and the power conversion efficiency was improved from 15.78% to 19.39%. This work brings opportunities for the research of MXene as potential materials in high-performance perovskite solar cells