Preparation and characterization of Al doped ZnO thin films by sol–gel process

Morphological, Structural and Optical Properties of ZnO Thin Films Deposited by Dip Coating Method

“…Compared with the above methods, sol-gel method is the most widely used due to its high versatility, simplicity, low equipment cost, the ability of accurate control of stoichiometry over the molecular level mixing, large area coating, high homogeneity and relatively low process temperature [20][21][22] . Although the sol-gel method is a relatively simple technique for depositing ZnO thin films, there are still some factors affecting the properties of the prepared films.…”

Some physical investigations on hexagonal-shaped nanorods of lanthanum-doped ZnO

“…The PL spectra and the deconvoluted (Gaussian analysis) into six peaks are shown in figure 14. Table 8 First, the deconvoluted peak around 391 nm (3.18 eV), originated from the exciton recombination corresponds to the near-band edge transition (NBE) of ZnO [59]. The Stokes shift, which is defined as the energy difference between the bandgap determined by absorption spectra and the first PL peak, is clearly observed.…”

“…Second, the broad blue emission assigned at 460 nm (2.7 eV) may be due to the exciton recombination between the electron localized at the interstitial zinc (Zn i ) and the holes in the valence band [57][58][59][60]. At La concentration of 3 at.%, the intensity of this peak becomes maximum which indicates the increase of Zn i amount.…”

“…It can be seen that peak located at 486 nm (2.5 [57][58][59][60]. The green emission at 520 nm is more controversial.…”

Size-controllable synthesis and photocatalytic performance of ZnO hollow spheres

“…In comparison with the traditional photocatalyst of TiO 2 , ZnO as an alternative semiconductor photocatalyst attracts lots of attentions due to its suitable band gap of 3.37 eV and even higher electron mobility [9][10][11][12][13]. So far, ZnO nanoparticles, powders and colloids and ZnO thin films have been widely used to photodegradate organic pollutants in waste water in the experiments [14][15][16][17][18][19][20][21]. All of them exhibit good performance, and some studies have demonstrated that ZnO exhibits higher efficiency than TiO 2 [22,23].…”