Jubu, Peverga R.Obaseki, O. S.Ajayi, D. I.Danladi, E.Chahrour, Khaled M.Muhammad, A.Landi Jr, S.2024-09-292024-09-2920240972-88210974-6900https://doi.org/10.1007/s12596-024-01741-0https://hdl.handle.net/20.500.14619/4197The optical diffuse reflectance data of a semiconductor material is usually converted into the Kubelka-Munk function before proceeding to process the conventional Tauc's plot from which optical bandgap energy can be determined. Firstly, it is conventional/ customary to convert the percentage reflectance (R-infinity(%)) data, which is obtained from UV-vis measurement into an equivalent reflectance (R-infinity) that range between 0 and 1 before processing the Tauc's plot. Secondly, the Kubelka-Munk function is usually multiplied by the incident photon energy, h nu, to produce an all-elements/ comprehensive Tauc's plot. Literature is scarce to convincingly demonstrate that a correct bandgap value can, alternatively be obtained from the Tauc's plot that is derived directly from the (R-infinity(%) data without having to convert to R-infinity. Also, publication is rarely available to demonstrate that a proper bandgap value can be determined without having to multiply the Kubelka-Munk function by the term h nu. The present investigation shows diminutive differences in the bandgap values estimated from the R-infinity(%)-based Tauc's plots and the equivalent R-infinity-based Tauc's plots. This suggests that either of the methods can be employed for a precise bandgap estimate. A comparison between the magnitudes of the bandgap energies determined from the comprehensive Tauc's plot and when the Kubelka-Munk function is not multiplied by h nu reveals insignificant differences in the estimated values. This suggests that either of the two methods can be employed to obtain a reliable bandgap for direct and indirect optical gap semiconductors.eninfo:eu-repo/semantics/closedAccessTauc's plotBandgap energyKubelka-Munk functionUV-vis spectroscopySemiconductorsArticle10.1007/s12596-024-01741-02-s2.0-85187293429Q3WOS:001171462400001N/A