IMPACT OF Mn2+ IONS ON MICRO-STRUCTURAL, LUMINESCENCE PROPERTIES OF ZnS-MoS2 NANOCOMPOSITES FOR OPTOELECTRONICS

Abstract

Bottom-up hydrothermal synthesis was used to prepare semiconducting natured undoped and Mn2+ doped nanocomposites of ZnS-MoS2. XRD -X-ray diffraction analysis, DRS- diffuse reflection spectroscopy spectrophotometer, FT-IR-Fourier transform infrared spectroscopy, SEM-scanning electron microscopy, and PLphotoluminescence techniques were used to characterize the structural, optical absorption, morphological, IR spectral, and luminescence properties of prepared powder samples. The average crystallite size of prepared nanocomposites ranged between 12 and 20 nm. The FT-IR spectra were used to examine the molecular vibrations and various functional groups contained in the prepared samples. Surface morphology analyses show the presence of spherical-shaped ZnS flakes and hexagonal MoS2 flakes. The energy bandgap decreases as the quantity of Mn2+ doping in the host lattice increases, showing the quantum confinement of prepared samples. The PL data indicates a characteristic luminescence peak in the yellow-orange region at 585 nm.