Self-powered photodetector based on liquid phase exfoliated Cu–WSe2 nanosheets

According to its tuneable optoelectronic capabilities that enhanced the application of the photo-sensing device, the 2D-TMDC (transition metal dichalcogenides) deposited thin films have been the subject of additional research. Herein, we describe the high-quality crystalline behaviour of 10% incorporation of Cu in the pristine WSe2 nanosheets using two step liquid phase exfoliation process and its use as a broad range photodetector. The vapour phase technique is used to grown compounds. The elemental mapping and purity were analysed by EDAX. Powder Xray diffraction shows that all exfoliated nanosheets have a hexagonal lattice structure. The structural morphology was investigated by SEM and HR-TEM. The Raman Spectra reveal that the exfoliated nanosheets have in plane E2g vibration mode. The effect of alloy engineering on photo responsiveness has been investigated. The maximum photodetector parameters are examined for the ITO based Cu (10%) WSe2 photodetector under various wavelength dependent monochromatic light sources for 40 mW/cm2 power intensity.