Journal
JOURNAL OF SOLID STATE CHEMISTRY
Volume 290, Issue -, Pages -Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2020.121576
Keywords
Gallium oxide; Bandgap; Tauc plot; Extrapolation; UV-vis-NIR
Funding
- Universiti Sains Malaysia (USM) [1001/PFIZIK/8011005]
Ask authors/readers for more resources
The effect of the Tauc plot scale and bandgap extrapolation technique on estimated optical bandgap values is often not strongly emphasized. Herein, we demonstrate that the scale of the conventional Tauc plot and the extrapolation technique poses significant influence on the determined value of bandgap. The nanomaterial used for this study was prepared by the CVD method using different H-2 reducing gas flow rates. XRD measurements confirmed polycrystalline beta-Ga2O3 with high crystalline quality. FE-SEM analysis revealed nanohump-like morphology. UV-vis-NIR measurements generally showed increasing bandgap with rising H-2 supply into the horizontal reactor. Specifically, it was observed that the proper extrapolation technique for bandgap estimation is more appropriate as compared to the values obtained from the traditional direct extrapolation method. It is established that direct extrapolation technique has the potential to either under - or over-estimate bandgap values, whereas the proper extrapolation method is promising for more reasonable values of optical energy gap.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available