Morphological and Optical Properties of Different Mg Percentage of ZnO/Mg Thin Films Prepared by Sol-Gel Spin-Coating and Immersion Method

Abstract

We have successfully demonstrated ZnO/Mg thin films on Mg seeded-template by using sol-gel spin-coating and immersion technique. By increasing weight percentage of Mg, zinc particles become agglomerate and displayed flower formed as displayed in FESEM characterization. It was observed that the morphology of the zinc particles on Mg seeded-template change from inconsistently distribution for 1 and 3 % into cluster flower-like of zinc particles for 5 and 7 % weight percentage of Mg. The optical properties of the ZnO/Mg thin films were examined by UV-Vis spectroscopy and the Tauc plot methods was used to estimate the optical band gap. The study reveals that, 7 % weight percentage of Mg was recorded as the highest transmittance which is more than 60 % in visible wavelength compared to others. With the rise weight percentage of Mg, the transmittance of the thin films was increased except for 5 %. This gradually downgraded to below 60 % of transmission most probably due to the grain size that becomes bigger. The optical band gap can be tuned by using different Mg percentage to the ZnO/Mg thin films.

Multifractal analysis of Mg‐doped ZnO thin films deposited by sol–gel spin coating method

“…Figure 8b demonstrates the Tauc plots of ZnO:Mg thin films extracted from the following equation (Aziz et al, 2015): where α , h , and υ are absorption coefficients, Plank's constant, and frequency of radiation, respectively. The calculated values of the optical bandgap for the spin‐coated ZnO:Mg (0, 2, 4, and 5%) thin films were observed to be 3.27, 3.31, 3.34, and 3.33 eV, respectively.…”

“…Figure 8b demonstrates the Tauc plots of ZnO:Mg thin films extracted from the following equation (Aziz et al, 2015):…”

“…Geometrical characteristics like thickness as well as smoothness of spin‐coated thin films can be controlled by the drying process and coating cycles (Khan, Bhatti, Qindeel, Alonizan, & Althobaiti, 2017). Numerous researches have recently focused on doping magnesium (Mg) element with a various concentrations within ZnO thin films by a simple spin coating process that requires soluble types of reagents to deposit transparent conductive films (TCFs) (Aziz et al, 2015; Huang et al, 2012; Mia et al, 2017; Salina, Ahmad, Suriani, & Rusop, 2012; Sengupta, Ahmed, & Labar, 2013; Siregar et al, 2020; Verma, Chaudhary, Kumar, Sharma, & Kumar, 2017). It has been established that the amount of Mg element can play an essential role on the surface and physical properties of the thin films.…”

The Potential of Pandanus amaryllifolius Leaves Extract in Fabrication of Dense and Uniform ZnO Microrods

“…The grown ZnO deposited on the Zn-Pandan and Zn-HMTA seed layer-coated glass substrates was cleaned by rinsing in deionized water and was dried in a furnace at 150 • C for 10 min. For grown ZnO on the Zn-HMTA seed layer, its annealing temperature was controlled at 500 • C for 1 h. This optimum annealing temperature has been established by other researchers especially in the solution immersion method [30][31][32][33][34][35]. ZnO nanorods prepared via the solution immersion method exhibited lower physicochemical properties when annealed at below a temperature of 500 • C. However, no current references have been found on the synthesis of grown ZnO microrods on Zn-Pandan seed layers using the solution immersion method.…”