Automated method for the determination of the band gap energy of pure and mixed powder samples using diffuse reflectance spectroscopy.
A. Escobedo-Morales,Irving Israel Ruiz-López,M.deL. Ruiz-Peralta,L. Tepech-Carrillo,L. Tepech-Carrillo,Manuel Sánchez-Cantú,J.E. Moreno-Orea +6 more
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TLDR
It is demonstrated that the method to estimate Eg by intersecting the straight-line fit of the Tauc segment with the photon energy axis is not appropriate for those samples containing more than one optical absorbing phase because systematic underestimation of the Eg value results.About:
This article is published in Heliyon.The article was published on 2019-04-01 and is currently open access. It has received 131 citations till now. The article focuses on the topics: Diffuse reflectance infrared fourier transform.read more
Citations
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Tauc-plot scale and extrapolation effect on bandgap estimation from UV–vis–NIR data – A case study of β-Ga2O3
TL;DR: In this paper, the effect of the Tauc plot scale and bandgap extrapolation technique on estimated optical bandgap values is often not strongly emphasized; however, it is observed that the proper extrapolation method for bandgap estimation is more appropriate as compared to the values obtained from the traditional direct extrapolation.
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Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements
Salmon Landi,Iran Rocha Segundo,Elisabete F. Freitas,Mikhail Vasilevskiy,Joaquim A. O. Carneiro,Carlos J. Tavares +5 more
TL;DR: In this article, the authors demonstrate how to use the K-M function and apply it thoroughly to the determination of the E g of TiO2 semiconductor powder (pressed at different thicknesses) from diffuse reflectance spectroscopy (DRS) measurements.
Journal ArticleDOI
Use and misuse of the Kubelka-Munk function to obtain the band gap energy from diffuse reflectance measurements
TL;DR: In this paper , the authors demonstrate how to use the K-M function and apply it thoroughly to the determination of the optical band gap energy (Eg) of TiO2 semiconductor powder (pressed at different thicknesses) from diffuse reflectance spectroscopy (DRS) measurements.
Journal ArticleDOI
Biosynthesis of Flower-Shaped CuO Nanostructures and Their Photocatalytic and Antibacterial Activities
TL;DR: Copper oxide nanoflowers synthesized through a novel green route using Tulsi leaves-extracted eugenol as reducing agent can effectively degrade methylene blue with 90% efficiency.
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On the analysis of diffuse reflectance measurements to estimate the optical properties of amorphous porous carbons and semiconductor/carbon catalysts
TL;DR: In this article, a critical analysis on the use of diffuse reflectance spectroscopy and Tauc equation to estimate the optical energy bandgap of semiconductor/carbon composites and amorphous porous carbons is provided.
References
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Book
CRC Handbook of Chemistry and Physics
TL;DR: CRC handbook of chemistry and physics, CRC Handbook of Chemistry and Physics, CRC handbook as discussed by the authors, CRC Handbook for Chemistry and Physiology, CRC Handbook for Physics,
Journal ArticleDOI
Optical Properties and Electronic Structure of Amorphous Germanium
Jan Tauc,R. Grigorovici,A. Vancu +2 more
TL;DR: In this article, the optical constants of amorphous Ge were determined for the photon energies from 0.08 to 1.6 eV, and the absorption is due to k-conserving transitions of holes between the valence bands as in p-type crystals.
Book
Optical Processes in Semiconductors
TL;DR: Optical processes in semiconductors as mentioned in this paper, Optical Process in Semiconductors (OPP), Optical Process of Semiconductor (OPS) and Optical Process (OPI)
Journal ArticleDOI
On the optical band gap of zinc oxide
V. Srikant,David R. Clarke +1 more
TL;DR: In this paper, the optical properties of ZnO crystals using a variety of optical techniques were compared and it was concluded that the room temperature band gap is 3.3 eV and that the other values are attributable to a valence band-donor transition at ∼3.15
Journal ArticleDOI
Band-gap energy estimation from diffuse reflectance measurements on sol–gel and commercial TiO2: a comparative study
Rosendo López,Ricardo Gómez +1 more
TL;DR: In this article, a comparison of the band gap energy estimated from UV-vis reflectance spectra of TiO2 powders prepared by sol-gel route versus commercial TiO 2 powders, nanopowder, bulk powder and P25 is reported.
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Optical Properties and Electronic Structure of Amorphous Germanium
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Band-gap energy estimation from diffuse reflectance measurements on sol–gel and commercial TiO2: a comparative study
Rosendo López,Ricardo Gómez +1 more