Electrical, dielectric, photoluminescence and magnetic properties of ZnO nanoparticles co-doped with Co and Cu

Role of Mn/Cr dual-doped ZnO nanoparticles of diluted magnetic semiconductors: influence on structural and electrical properties

“…The conductivity values of the low doping content samples with Mn and Cr increase up to 1.5% of Mn in the sample 1.5Mn0.5Cr, after that the conductivity values decrease. The observed rise in conductivity can be assigned to generated charge carrier by the added dopants [47]. The observed decrease in conductivity with increasing charge carrier density, specifically Mn, can be attributable to defections such as interstitial oxygen vacancies introduced by the dopant Mn.…”

Enhancing the magnetic and antibacterial properties of ZnO nanopowders through Mn+Co doping

“…3 shows the room temperature PL spectra of undoped and Mnþ Co doped ZnO nanopowders. It is observed that the broad emission peak in the UV region, centered at 386 nm is associated with the near band-edge emission (NBE) of ZnO results in due to the band to band electronic transition [15]. The strongest peak at 425 nm corresponds to the zinc interstitial (Zn i ) may be originating from the electron transition from the shallow donor levels of zinc interstitials to the valence band [35].…”

“…Therefore, in the present study the Mn doping level is limited to 10 at% and a co dopant Co is added in order to enhance the carrier concentration to a greater extent. Ashokkumar et al [15] and Jayakumar et al [16] reported that the codoping of Co with Cr increased the carrier concentration remarkably which in turn enhanced the ferromagnetism in the ZnO nanoparticles.…”

Effect of Cu-Dopant on the Structural, Magnetic and Electrical Properties of ZnO

“…It was potentially used for some applications such as solar energy conversion, storage, spintronics, gas sensing, optoelectronics, photovoltaic, varistors, photocatalysts, piezoelectric devices, LED, UV light emitters, luminescent devices, field emission electron sources and nanoscale power generator [1][2][3][4]. ZnO doped with transition metals of Mn, Fe, Co and Ni shows a ferromagnetic behavior which makes ZnO as a strong candidate in the realization of spintronics [5,6].…”

“…The study by Owens [7] showed that Cu-doped ZnO has a ferromagnetic behavior at above room temperature. Various methods were used to synthesize Cudoped ZnO, such as solid state reaction [4,9] coprecipitation [1,10], and citrate sol-gel [11,4].…”