Figure 17.

(a) The measured PCE of the device with and without 0.03 wt.% Ti₃C₂T_x. (b) The Nyquist plots of the device with and without 0.03 wt.% Ti₃C₂T_x under dark conditions with a 0.7 V bias voltage. Reproduced with permission from Reference [162]. Copyright 2018, Wiley-VCH. (c) The energy scheme of perovskite device with and without doped MXene. (d) The simulated PCE of three different types of PVSK solar cells. Reproduced with permission from Reference [163]. Copyright 2019, Springer Nature. (e) The energy bandgap and carrier transport mechanism of the device under illumination at the interface, respectively. (f) The measured PCE of the device as a function of the time under ambient and high-temperature conditions. Reproduced with permission from Reference [164]. Copyright 2019, Royal Society of Chemistry. (g) The energy scheme of the device. (h) The measured PCE of the device with MDCN-Air&N₂ and SnO₂ ETL. Reproduced with permission from Reference [166]. Copyright 2020, Springer Singapore. (i) The energy scheme and energy transfer between MXene and perovskite nanoflakes. Reproduced with permission from Reference [167]. Copyright 2020, Wiley-VCH. (j) The schematic diagram of the device. (k) The Nyquist plots of the device with optimized Ti₃C₂T_x-doping PVSK solar cells. (l) The measured PCE of Ti₃C₂T_x-doping PVSK solar cells. Reproduced with permission from Reference [165]. Copyright 2021, Springer Singapore.