Fabrication of TiO<sub>2</sub>/MXene Nanohybrid Electron Transport Layer by Artist Spray Gun Assisted Pyrolysis Method for Efficient Carbon Perovskite Solar Cell
Pratheep Panneerselvam, Senthilkumar Ramasamy, Saradh Prasad Rajendra, Mohamad S. AlSalhi, JohnZhanhu Guo, Subramania Angaiah
Abstract
Abstract A new class of 2D Ti 3 C 2 T x (MXene) in different weight percentages (0, 1, and 2 wt.%) are hybrid with TiO 2 nanopowder to form TiO 2 /MXene nanohybrids by artist spray gun assisted (ASG) pyrolysis method to use an electron transport layer (ETL) for carbon perovskite solar cell (PSC). The influence of Ti 3 C 2 T x on TiO 2 in light absorption, charge separation and carrier dynamics is studied in detail. The formation of TiO 2 /MXene is studied by X‐ray diffraction analysis. The emission spectrum, charge separation and carrier dynamics of TiO 2 /MXene nanohybrid are analyzed by photoluminescence studies. They exhibit an emission spectrum at 390 nm. The photoluminescence and electrochemical impedance results reveal that the Ti 3 C 2 T x nanosheets provide a superior charge transfer path with less electron transfer resistance at the ETL/perovskite interface, which lead to produce higher photocurrent. This study reveals that TiO 2 /MXene nanohybrid can be used as a promising ETL to enhance the photo‐conversion efficiency of carbon PSC. These results reveal that TiO 2 ‐ MXene (1 wt.%) nanohybrid ETL shows the highest PCE of 5.15% than that of TiO 2 ‐ MXene (2 wt.%) nanohybrid ETL and pristine TiO 2 ETL‐based PSC (4.64%).