Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.


Issue 9, 2019
Previous Article Next Article

Complex dielectric transformation of UV-vis diffuse reflectance spectra for estimating optical band-gap energies and materials classification

Author affiliations

Abstract

In this work, a complex dielectric transformation of UV-vis diffuse reflectance spectra is proposed to estimate the optical band-gap energies of an array of materials classified as semi-conductors, conductors and insulators and the results are compared with the more common Kubelka–Munk (K–M) transformation. The results show a close match between the proposed method and the Tauc model based on the K–M transformation within ca. 0.16–7.07% variation. The proposed method based on the well-established dielectric transformation is unique in a way to estimate band-gap energy when there remain unresolved or multiple absorption peaks in the diffuse reflectance spectra. Importantly, the complex dielectric transformation method also distinguishes the class of the materials which is of paramount importance to validate and substantiate the band-gap energy values.

Graphical abstract: Complex dielectric transformation of UV-vis diffuse reflectance spectra for estimating optical band-gap energies and materials classification

Back to tab navigation

Supplementary files

Publication details

The article was received on 21 Nov 2018, accepted on 02 Mar 2019 and first published on 05 Mar 2019


Article type: Paper
DOI: 10.1039/C8AN02257G
Analyst, 2019,144, 3005-3012

  •   Request permissions

    Complex dielectric transformation of UV-vis diffuse reflectance spectra for estimating optical band-gap energies and materials classification

    P. George and P. Chowdhury, Analyst, 2019, 144, 3005
    DOI: 10.1039/C8AN02257G

Search articles by author

Spotlight

Advertisements