Development of MXene/WO3 embedded PEDOT:PSS hole transport layers for highly efficient perovskite solar cells and X-ray detectors

A simple solution process was employed to decorate WO3 nanoparticles on 2D conductive Ti3C2TX MXene sheets to arrange the MXene/WO3 hybrid structure. The prepared hybrid composites were established by the Raman scattering, X-ray diffraction, and microscopy studies evidently. The designed hybrid structure, for the first time, was engaged with PEDOT:PSS to alter the hole transport layer (HTL) of perovskite hybrid module for the highly efficient planar solar cell and X-ray detector. The derived outcomes revealed a high power conversion efficiency of 12.26 +/- 0.12% for the constructed perovskite solar cell with MXene/WO3/PEDOT:PSS HTL. Similarly, the fabricated X-ray photodetector with MXene/WO3 blended HTL device attained a superior sensitivity of 3.67 +/- 0.03 mA Gy(-1)center dot cm(-2). The results envisaged that HTL/perovskite interface was effectively tuned by the MXene/WO3 heterostructure through their active interface for transfer/collection of charges and appropriately altered energy band alignment, which gave the nod for easy to charge extraction and shortest charge carrier lifetime.

Automated summary

In this study, a simple solution process was used to decorate WO3 nanoparticles on 2D conductive Ti3C2TX MXene sheets, forming MXene/WO3 hybrid structure, which was applied for the first time as the hole transport layer (HTL) in perovskite solar cells and X-ray detectors. The results showed that the perovskite solar cell with MXene/WO3/PEDOT: PSS HTL achieved a high power conversion efficiency, while the X-ray photodetector with MXene/WO3 blended HTL device exhibited superior sensitivity. The research findings revealed that the MXene/WO3 heterostructure effectively tuned the HTL/perovskite interface, facilitating charge extraction and shortest charge carrier lifetime.