In the context of renewable and low cost energy production, new generation photovoltaics aims to ensure high power conversion efficiency (PCE) accomplished by low cost manufacturing processes. Perovskite solar cells (PSCs) are one of the most impressive attempt in achieving such ambitious goals. In this scenario, several device architectures and materials modifications have been proposed to tune the device interface properties and the perovskite crystal morphology. Indeed, graphene, related materials and transition metal dichalcogenide such as molybdenum disulphide (MoS₂) have been successful applied in PSCs and modules [1] as interface engineering by improving the device performance [2] and by enlarging the lifetime.[3,4] Recently MXenes (MX) with the general formula M_n+1X_nT_x, where M represents an early  transition metal, X is carbon and/or nitrogen,  and T_x stands for surface terminations (such as OH, O, and F) came out as a new class of bidimensional (2D) materials with outstanding properties. MXenes exhibit high electronic conductivity, hydrophilic surface, high surface energy, and remarkable tunability in term of work function, ranging from 1.6eV till 6.5eV.[5] In this work, we demonstrate the use of Ti₃C₂T_x MX for perovskite photovoltaics by fine tuning the interface optoelectronic properties in engineered mesoscopic device. In particular, we modified the photo-electrode properties by adding MX within the precursor solutions. On one hand, transient measurements revealed the addition of MX within perovskite active layer reduces the charge trapping efficiency of deep trap states by reducing the charge accumulation and eventually the hysteresis in the current-voltage (I-V) curve. On the other hand, UPS measurements showed a shift in perovskite workfunction testifying the role of MX in modifying the perovskite electronic structure. Moreover, when ETL is modified with MX, the improvement in device PCE stems mainly from V_OC and FF increase. Indeed, a reduction of charge recombination rate is demonstrated at ETL+MX/perovskite+MX interface. As further confirmation, charge carrier lifetime showed an enlarged value when MX-based ETL is used in the cell. Notably, the proposed MX-perovskite cells showed superior PCE overcoming 20% with outstanding reduction of hysteresis phenomenon. Detailed DFT calculations and device simulations permitted to define the role of MX. Due to the chemical versatility of MX, this work opens the way for a further development of perovskite technology by exploiting the possibility to optimize device structures, layers and interfaces with proper material tuning.