In this work we demonstrate the beneficial role of MXenes doping for both perovskite absorber and electron transporting layer in NiO-based inverted perovskite solar cells. The addition of MXenes permits on one side to easy tune the energy level alignment at perovskite/charge transporting layer interface, and on the other side to passivate traps states within the cell structure, which in turn improve charge extraction and collection at the electrodes. The MXenes-based engineered cells showed superior performance, with power conversion efficiency exceeding 19% and improved stabilized power output with respect to reference devices. Due to the possibility to finely tune the MXene work function during their chemical synthesis and to their capability in modifying the optoelectronic properties of PSC layer when used as dopant, the proposed approach opens countless ways for engineering inverted PSC structure, strongly promising in term of long-term stability and future scalability on large area devices.

在这项工作中，我们证明了MXene掺杂对于NiO基倒置钙钛矿太阳能电池中钙钛矿吸收体和电子传输层的有益作用。MXene的添加一方面可以轻松调整钙钛矿/电荷传输层界面处的能级排列，另一方面可以钝化单元结构中的陷阱态，从而改善了电极处的电荷提取和收集。基于MXenes的工程电池表现出卓越的性能，相对于参考器件，其功率转换效率超过19％，并提高了稳定的功率输出。由于可以在其化学合成过程中微调MXene功函数，并且当用作掺杂剂时可以改变PSC层的光电性能，