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All Journal Makara Journal of Science
Malek, Mohd Firdaus
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Effect of Niobium Dopant on ZnO Thin Films Prepared via the Sol–gel Spin Coating Method Eswar, Kevin Alvin; Rostan, Nur Fairuz; Mohamad, Maryam; Md Akhir, Rabiatuladawiyah; Rasmidi, Rosfayanti; Guliling, Muliyadi; Azhar, Najwa Ezira; Buniyamin, Irmaizatussyehdany; Malek, Mohd Firdaus; Mahmood, Mohamad Rusop; Suhaimi, Husairi Fadzilah; Abdullah, Saifollah
Makara Journal of Science Vol. 29, No. 1
Publisher : UI Scholars Hub

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Abstract

Thin films of zinc oxide (ZnO) and niobium (Nb)-doped ZnO were deposited on a glass substrate using the sol–gel spin coating method. Diethanolamine, isopropyl alcohol, and zinc acetate served as the stabilizers, solvent, and starting ma-terial, respectively. Niobium pentachloride was employed as the dopant source. Energy-dispersive X-ray analysis con-firmed Nb incorporation. Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD), and ultravio-let–visible spectroscopy (UV–Vis) analyses characterized the morphology, structure, and optics of the films, respective-ly. Both films, comprising nanoparticles, were visible in FESEM. Nb doping reduced the particle size from 44.2 nm to 35.8 nm. The XRD peaks at 31.23°, 33.48°, and 35.7° indicate the (100), (002), and (101) orientations, respectively. Nb-doped ZnO exhibited enhanced visible-range transmission in UV–Vis analysis. However, UV spectrum transmission significantly decreased. Nb doping reduced the optical bandgap of ZnO from 3.30 eV to 3.27 eV.
Co-Authors Abdullah, Saifollah Azhar, Najwa Ezira Buniyamin, Irmaizatussyehdany Eswar, Kevin Alvin Guliling, Muliyadi Md Akhir, Rabiatuladawiyah Mohamad Rusop Mahmood, Mohamad Rusop Mohamad, Maryam Rasmidi, Rosfayanti Rostan, Nur Fairuz Suhaimi, Husairi Fadzilah