Electrical, dielectric, photoluminescence and magnetic properties of ZnO nanoparticles co-doped with Co and Cu
M Ashokkumar, S Muthukumaran
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | ELSEVIER | Published : 2015
X-ray diffraction spectra of Zn0.96-xCu0.04Co xO (0 ≤ x ≤ 0.04) nanoparticles synthesized by co-precipitation method confirmed the hexagonal wurtzite structure without any secondary phase formation. The dielectric dispersion was high at lower frequencies and almost frequency independent at higher frequencies. The observed higher dielectric constant, dielectric loss and ac conductivity in Co=2% doped Zn 0.96Cu0.04O samples was explained in terms of average crystalline size and number of nano-dipoles. Photoluminescence spectra of undoped and Co-doped Zn0.96Cu0.04O samples showed four distinct bands, (i) ultra violet emission bands around 382-391 nm, (ii) violet emission band centered at 417 nm..View full abstract
Awarded by University Grant Commission (UGC), New Delhi, India
The authors are thankful to the University Grant Commission (UGC), New Delhi, India, for financial support under the project [File no.: 41-968/2012 (SR)].