Structural and optical studies of Mn2+ substituted CdO nano-particles

Cd1-xMnxO (x=0, 2, 5, 7, 10, 15, 20%) nano-particles were synthesized using co-precipitation method and were characterized to investigate the effect of doping of Mn2+ ions on the properties of CdO. X-ray diffractographs show the cubic structure of pure and Mn2+ substituted CdO nano-particles. XPS spectra illustrate that Mn2+ ions substituted at the Cd2+ sites in CdO lattice. Raman micrographs show Cd-O vibrations in CdO but Mn-O stretching along with Cd-O vibrations in Mn2+ substituted nano-particles at higher doping. At low doping, the band gap increases but decreases afterwards thereby show the influence of electron concentration after the substitution of Mn2+ ions. Urbach energy has been calculated from UV-Visible analysis and their values are found to follow the band gap broadening and narrowing with Mn2+ substitution. Surface morphology and FTIR of nano-particles also confirm the substitution of Mn2+ ions into CdO lattice.

Automated summary

The study investigated the impact of different doping concentrations of Mn2+ ions on the properties of CdO, revealing changes in lattice structure, electron concentration, band gap, and Urbach energy with increasing doping concentration.