Tuning of structural and optical properties and defect induced photoluminescence on Ni-doped Cd0.9Zn0.1S nanoparticles

Abstract Ni-doped Cd 0.9 Zn 0.1 S nanoparticles with Ni = 0, 1 and 3% have been prepared by co-precipitation route. Cubic structure was authenticated by XRD pattern in the entire Ni range without any impurities and secondary phase formation. The size variation between 42 and 63 A, lattice parameters and micro-strain was discussed by Ni-doping and defects induced by Ni. The lattice disorder and more number of defect states by Ni addition is expressed by scanning electron microscope images. The Ni-modified CdS functional groups and their chemical bonding were confirmed by Fourier transform infrared studies. The strong red shift of energy gap from 3.81 eV (Ni = 0%) to 3.38 eV (Ni = 1%) can be linked with defect encouraged energy gap tailoring owing to the manufacturing of localized states and confirmed that Ni 2+ ions were actually included into the Cd–Zn–S lattice. The synthesis of Zn, Ni dual doped CdS nanoparticles is expected to be green solid-state lighting materials.