Effect of annealing temperature on structural morphological and optical properties of spray pyrolized Al-doped ZnO thin films

Abstract

Aluminium doped zinc oxide (AZO) thin films were prepared on glass substrate by spray pyrolysis technique and subsequently their structural, morphological and optical properties were investigated and analyzed as a function of annealing temperature. The films were deposited at 350°C and were annealed at temperature 350, 400, 450 and 500°C. X-ray diffraction (XRD) analysis confirms that both deposited and annealed films are polycrystalline in nature and have hexagonal wurtzite structure. The crystalline size as well as the crystalline quality of the film was found to increase with the increase of annealing temperature to a certain point. However, the dislocation density and the compressive stress induced in as-deposited AZO films reduce with annealing temperature. SEM image reveals that the deposited film has nanorope like morphology. The average diameter of the rope and the density of the morphology increases with the increase of annealing temperature. As the annealing temperature increases from 350°C to 450°C, the average transmittance of the films increases and the band gap value decreases from 3.25 eV to 3.17 eV. In addition, obtained results also show that urbach energy, extinction coefficient, refractive index, optical conductivity has changes noticeably with annealing temperature.

Biosynthesis of Zinc Oxide Powder Using Sandoricum koetjape Peel Extract at Various Annealing Temperature

“…The shape of the annealed sample particles in Figure 3 (b-d) is almost not uniform as evidenced by the presence of flower-like particles. These results are similar to the research conducted by Kabir et al [12]. The size of the ZnO particle diameter is presented in Table 2.…”

Structural and Optical Properties of ZnO Thin Films Prepared by Molecular Precursor and Sol–Gel Methods

“…The effect of annealing temperature on the structural, morphological, and optical properties of spray-pyrolized Al-doped ZnO thin films was systematically investigated by Kabir et al [48]. It was shown that the annealing temperature affects the optical transmittance of the Al-doped ZnO thin films with the average transmittance value within the visible region found to be 70.3% for the as-deposited film [48]. indium tin oxide (ITO) substrate in the visible region was reported by Chen et al [47].…”

Dependence of new environmental nano organic semiconductor nickel-(II)-tetraphenyl-21H,23H-porphyrin films on substrate type for energy storage applications

“…Solid substrates include conducting and non-conducting substrates (Hasani et al 2019). Conducting substrates include transparent conducting oxide (TCO) substrates such as indium tin oxides (ITO), fluorine-doped tin oxide (FTO) and zinc oxide (ZnO) and metal substrates such as Ag, Au and Si (Kabir et al 2019). Non-conducting substrates include amorphous substrate (glass), crystalline substrate (quartz) and flexible substrate (mica).…”

“…Non-conducting substrates include amorphous substrate (glass), crystalline substrate (quartz) and flexible substrate (mica). Substrate can be used as a thin-film supporter or as a current collector in different energy applications (Ngamsinlapasathian et al 2006;Hasani et al 2019;Kabir et al 2019).…”