Dispensability of the conventional Tauc’s plot for accurate bandgap determination from UV–vis optical diffuse reflectance data

• DOI: 10.1016/j.rio.2022.100273
• Publication Date: 2022-07-22T06:27:02Z
• Authors: Peverga R. Jubu; O.S. Obaseki; A. Nathan-Abutu; F.K. Yam; Yushamdan Yusof; M.B. Ochang
• Keywords: Diffuse reflection; Plot (graphics)

The use of the conventional Tauc's method to determine optical bandgap energy from UV–vis spectroscopy data has been overemphasized for decades. However, a misuse formula in conjunction with Kubelka-Munk function semiconductors diffuse reflectance can lead erroneous estimates. Particularly, large errors be associated computing values ordinate using Tauc-Kubelka-Munk relationship produce plot. To address this apparent error, present paper shows that versus photon plot estimation employed obtain reasonable values, suggesting is not indispensable accurate determination. relatively simple best choice when researcher unsure about computations which proper Interestingly, rarely reported (if at all it found elsewhere) step-by-step approach described serve as guide emerging material scientists. β-Ga2O3, ZnO and TiO2 semiconductor films are used study.