Tuning the TiO 2 /ZnO heterostructures emissions through nickel doping for intriguing optoelectronic and photonic applications

It opens the door to many optoelectronic and photonic applications. Here, synthesized TiO 2 was deposited on Ni(0,8,10,12%) doped ZnO using two different methods; TiO 2 was coated on Ni(0,8,10,12%) prepared by dip coating. 12%) doped on top of ZnO, and Ni-doped ZnO films were grown by spray pyrolysis. Analysis of surface structure was conducted using Atomic Force Microscopy, scanning electron microscopy and microscopic Raman spectroscopy. Nickel doping was investigated by EDS analysis to ensure that the incorporation of dopants does not form a second phase. In addition, spectroscopic measurements including UV–Vis absorption and photoluminescence were performed. Preliminary results show that Ni doping reduces the absorption of TiO 2 /ZnO in the visible region. The carbon content is shown in the form of photoluminescence with a maximum of green, orange and red. Therefore, TiO 2 /Ni-doped ZnO heterostructures can also be used to exploit these findings in nanophotonics applications.