Publication result detail

Energy gap measurements based on enhanced absorption coefficient calculation from transmittance and reflectance raw data

ALLAHAM, M.; DALLAEV, R.; BURDA, D.; SOBOLA, D.; NEBOJSA, A.; KNÁPEK, A.; MOUSA, M.; KOLAŘÍK, V.

Original Title

Energy gap measurements based on enhanced absorption coefficient calculation from transmittance and reflectance raw data

English Title

Energy gap measurements based on enhanced absorption coefficient calculation from transmittance and reflectance raw data

Type

WoS Article

Original Abstract

The absorption coefficient plays an important role in studying and characterizing semiconducting materials. It is an important parameter to study the mechanism of photons absorption within the structure of the studied material. Thus, it helps to study the several types of charge carrier transport along with the energy band structure and its defects. In literature, a formula was reported to precisely calculate the absorption coefficient from raw data of transmittance and reflectance of electromagnetic radiation. However, the reported formula has several issues limiting its validity in the literature. In this paper, we provide a more mathematically accurate form of this equation to precisely obtain the absorption coefficient from the raw data, by considering the total internal reflection at the different interfaces. Moreover, the equation is tested by simulated data and is applied to study the optical characteristics of a single-component epoxy resin from its transmittance and reflectance raw data.

English abstract

The absorption coefficient plays an important role in studying and characterizing semiconducting materials. It is an important parameter to study the mechanism of photons absorption within the structure of the studied material. Thus, it helps to study the several types of charge carrier transport along with the energy band structure and its defects. In literature, a formula was reported to precisely calculate the absorption coefficient from raw data of transmittance and reflectance of electromagnetic radiation. However, the reported formula has several issues limiting its validity in the literature. In this paper, we provide a more mathematically accurate form of this equation to precisely obtain the absorption coefficient from the raw data, by considering the total internal reflection at the different interfaces. Moreover, the equation is tested by simulated data and is applied to study the optical characteristics of a single-component epoxy resin from its transmittance and reflectance raw data.

Keywords

Absorption coefficients; Charge transition; Enhanced absorption; Gap measurements; Measurement-based; Photons absorption; Semiconducting materials; Tauc plots; Transmittance and reflectances; Urbach energy

Key words in English

Absorption coefficients; Charge transition; Enhanced absorption; Gap measurements; Measurement-based; Photons absorption; Semiconducting materials; Tauc plots; Transmittance and reflectances; Urbach energy

Authors

ALLAHAM, M.; DALLAEV, R.; BURDA, D.; SOBOLA, D.; NEBOJSA, A.; KNÁPEK, A.; MOUSA, M.; KOLAŘÍK, V.

RIV year

2025

Released

18.01.2024

Publisher

Elsevier

ISBN

1402-4896

Periodical

Physica Scripta

Volume

99

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

9

Pages count

9

URL

https://iopscience.iop.org/article/10.1088/1402-4896/ad1cb8

Full text in the Digital Library

http://hdl.handle.net/11012/245482

BibTex

@article{BUT187384,
  author="Mohammad Mahmoud Mohammad {Allaham} and Rashid {Dallaev} and Daniel {Burda} and Dinara {Sobola} and Alois {Nebojsa} and Alexandr {Knápek} and Marwan {Mousa} and Vladimír {Kolařík}",
  title="Energy gap measurements based on enhanced absorption coefficient calculation from transmittance and reflectance raw data",
  journal="Physica Scripta",
  year="2024",
  volume="99",
  number="1",
  pages="1--9",
  doi="10.1088/1402-4896/ad1cb8",
  issn="0031-8949",
  url="https://iopscience.iop.org/article/10.1088/1402-4896/ad1cb8"
}

Documents

Allaham_2024_Phys._Scr._99_025952