Temperature-dependence on the structural, optical, and paramagnetic properties of ZnO nanostructures

Temperature-dependent photoluminescence and Raman investigation of Cu-incorporated ZnO nanorods

“…4(a) and (b) presents the evolution of the Raman spectra as a function of temperature for ZnO and CuZnO nanorods, respectively. For all spectra, a strong and dominant peak located at about 438 cm À 1 is observed, which is believed to be a characteristic scattering peak of the Raman-active dominant E high 2 mode of wurtzite hexagonal ZnO [35,34]. In addition, another peak at about 330 cm À 1 is also observed, which can be assigned to E 2H -E 2L .…”

“…With regard to the origin of D 2 peak, which is located around 460 nm at room temperature estimated from the trend, it may be mainly attributed to the transition of electrons from the donor level Zn i to the acceptor level V À Zn (about 460 nm), according to Refs. [34,25]. Fig.…”

Pd2+ doped ZnO nanostructures: Structural, luminescence and gas sensing properties

“…In order to understand the origination of these emission peaks, the spectral region 350-750 nm was de-convoluted using Gaussian fit. The sub-peak at 381 nm which is directly related to formation of excitons is related to band-edge absorption of ZnO [9]. The emission peak at 391 nm can be ascribed to the shallow donor zinc interstitial (Zn i ) or Zn i related complex defect [11,12].…”

A study on the sensing of NO2 and O2 utilizing ZnO films grown by aerosol spray pyrolysis

“…Therefore, the intensity of this component is a measure of the number of oxygen atoms in a fully oxidised stoichiometric surrounding. The second peak (O b ) located at 531.6 eV is associated with O 2À ions that are in oxygen deficient regions within the matrix of ZnO and/or ZneOH groups [35,36]. Thus, changes in the intensity of this peak may be partly connected to the variation in the concentration of surface defects, such as Vo or/and V Zn in ZnO nanostructures.…”

“…The O 1s photoelectron line consists of three peaks. The first peak (O a ) located at 530.5 eV is generally attributed to OeZn bonds [35,36]. Therefore, the intensity of this component is a measure of the number of oxygen atoms in a fully oxidised stoichiometric surrounding.…”