Synthesis and Characterizations of ZnO Thin Films Grown by Physical Vapor Deposition Technique

Abstract

In the current study, Zinc oxide (ZnO) thin films have been synthesized over the whole the glass-slide substrate by utilizing the physical vapor deposition (PVD) technique. The Zinc (Zn) seed layer was deposited by heating the high purity Zn powder by using a molybdenum (Mo) boat at 37.503×10-3 Torr vacuum pressure of the PVD chamber. The ZnO thin films were fabricated by oxidation of the Zn seed layer coated glass-slide substrate at 400 °C. The morphological, chemical compositions, crystal quality, structural and optical properties of fabricated ZnO thin film were characterized and studied utilizing several characterization techniques. The results found that the high distribution density, homogenous, uniform, and high-quality ZnO thin film was grown over the entire substrate. The synthesized ZnO thin film with a thickness of 130 nm was grown with high purity and polycrystalline hexagonal-Wurtzite phase of ZnO. The sharp, and dominant diffraction peak was observed at peak position 34.3375 along (002) plane and c-axis. The investigated crystal size, dislocation density, and interplanar spacing were about 13.33 nm, 5.63×10-5 A°, and 2.609 A°, respectively. Also, UV-visible spectroscopy results show the high transmittance and low absorbance in the visible (Vis.) region and were about 90%, and the transmittance decreases sharply near the UV region at a wavelength around 383 nm. Besides, obtained the energy band-gap (Eg) was about 3.24 eV.

Efficient photo-Fenton catalysis using magnetic iron nanoparticles decorated boron nitride quantum dots: theoretical and experimental investigations

“…5A , then a Tauc plot was plotted, and the results were in good agreement with those from the theoretical DFT calculation. 79,80 The E g of Fe@BNQDs was evaluated from the Tauc plot and it was estimated to be 2.39 eV. From the optical absorption spectra in Fig.…”

Silver-Loaded Carbon and Phosphorous Co-Doped Boron Nitride Quantum Dots (Ag@CP-BNQDs) for Efficient Organic Waste Removal: Theoretical and Experimental Investigations

“…With respect to the band structure of Ag@CP-BNQDs, the Tauc plot was plotted from the data obtained from UV–vis absorption spectra. ,, As shown in Figure S2B,D, for example, Ag@CP-BNQDs was evaluated by extrapolation of the linear part of the curves measured by plotting (α h υ)­2 versus h υ. Accordingly, for example, it was determined to be 2.29 eV in water and 2.53 eV when Ag@CP-BNQDs were dispersed in DMF.…”

Effect of Temperature on Porous Ceramic Substrates Supported ZnO Thin Films for Enhanced Photocatalytic Activity

“…ZnO thin films can be deposited on different substrates, such as glass, silicon, ceramic, fluorine-doped Tin Oxide (FTO), polyurethane foam, Quartz Glass and Sapphire (001) [12][13][14][15][16]. Various deposition techniques have been used to deposit active oxide thin films, including spray pyrolysis [17], physical vapor deposition [18], chemical vapor deposition [19], atomic layer deposition [20], and the sol-gel method [21]. The sol-gel dip-coating technique is a simple and inexpensive technique that is easy to control with a low deposition temperature and the ability to inject the metal oxide gel into substrate pores [22].…”