Considerations about the determination of optical bandgap from diffuse reflectance spectroscopy using the tauc plot
dc.authorid | Chahrour, Khaled M. N./0000-0002-8799-3468 | |
dc.authorid | Jubu, Rex/0000-0002-5249-1273 | |
dc.contributor.author | Jubu, Peverga R. | |
dc.contributor.author | Obaseki, O. S. | |
dc.contributor.author | Ajayi, D. I. | |
dc.contributor.author | Danladi, E. | |
dc.contributor.author | Chahrour, Khaled M. | |
dc.contributor.author | Muhammad, A. | |
dc.contributor.author | Landi Jr, S. | |
dc.date.accessioned | 2024-09-29T15:54:38Z | |
dc.date.available | 2024-09-29T15:54:38Z | |
dc.date.issued | 2024 | |
dc.department | Karabük Üniversitesi | en_US |
dc.description.abstract | The 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. | en_US |
dc.description.sponsorship | Universiti Sains Malaysia [FRGS/1/2020/STG05/USM/02/4]; Ministry of Higher Education Malaysia; Universiti Sains Malaysia (USM) | en_US |
dc.description.sponsorship | The authors appreciate the Ministry of Higher Education Malaysia for the Fundamental Research Grant Scheme with Reference Code: (FRGS/1/2020/STG05/USM/02/4), and Universiti Sains Malaysia (USM) for the financial and technical support they provided for this work. | en_US |
dc.identifier.doi | 10.1007/s12596-024-01741-0 | |
dc.identifier.issn | 0972-8821 | |
dc.identifier.issn | 0974-6900 | |
dc.identifier.scopus | 2-s2.0-85187293429 | en_US |
dc.identifier.scopusquality | Q3 | en_US |
dc.identifier.uri | https://doi.org/10.1007/s12596-024-01741-0 | |
dc.identifier.uri | https://hdl.handle.net/20.500.14619/4197 | |
dc.identifier.wos | WOS:001171462400001 | en_US |
dc.identifier.wosquality | N/A | en_US |
dc.indekslendigikaynak | Web of Science | en_US |
dc.indekslendigikaynak | Scopus | en_US |
dc.language.iso | en | en_US |
dc.publisher | Springer India | en_US |
dc.relation.ispartof | Journal of Optics-India | en_US |
dc.relation.publicationcategory | Makale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı | en_US |
dc.rights | info:eu-repo/semantics/closedAccess | en_US |
dc.subject | Tauc's plot | en_US |
dc.subject | Bandgap energy | en_US |
dc.subject | Kubelka-Munk function | en_US |
dc.subject | UV-vis spectroscopy | en_US |
dc.subject | Semiconductors | en_US |
dc.title | Considerations about the determination of optical bandgap from diffuse reflectance spectroscopy using the tauc plot | en_US |
dc.type | Article | en_US |