Copper dopants impact enhanced behavior of Mn:Cu co-doped CdS nanocrystals (quantum dots) and their characteristics for optoelectronic applications

Mn and Cu:Mn co-doped CdS nanostructures were chemically prepared and deposited as thin films on glass slides by PLD technique. XRD peaks showed hexagonal nanostructure (Greenockite) phase. The studied parameters are as follows: strain, particle size, bond length, and stress to get more information about crystal structures. The analysis confirmed that the Cu/Mn ratio co-doping remarkably influenced the surface morphologies of the (CuxMn1-x) co-doped CdS (QDs) at (x=0, 1, 2 and 3) at.%. The chemical composition analysis EDX announced that the Cu/Mn is present in the doped films. Two luminescence peaks appeared in the photoluminescence (PL) spectrum for all samples of the compounds referring recombination of the defect sates of Mn:CdS. The energy gap values of all deposited films were observed to be in the range of (2.972.74) eV, optical absorbance has two absorption peaks, and shifted to higher wavelengths, UV-Vis particle size was in the range (2.473.10 nm) and was estimated using Brus equation.