Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector
Bismuth selenide (Bi2Se3) is a van der Waals compound which has been excellently reported as thermoelectric material. Linear dispersion near Fermi energy level is an exciting feature to consider, a promising candidate for photonic device within broadband wavelengths. For this application, detailed k...
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my.utm.753722018-03-22T11:05:35Z http://eprints.utm.my/id/eprint/75372/ Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector Lawal, A. Shaari, A. Ahmed, R. Ali, M. H. Jarkoni, N. QC Physics Bismuth selenide (Bi2Se3) is a van der Waals compound which has been excellently reported as thermoelectric material. Linear dispersion near Fermi energy level is an exciting feature to consider, a promising candidate for photonic device within broadband wavelengths. For this application, detailed knowledge of its structural, electronic and optical properties is very essential. The electronic properties were determined by density functional theory (DFT) calculations implemented in Quantum-Espresso simulation package which uses plane wave basis and pseudopotential for the core electrons. Optical properties are computed by solving Bethe-Salpeter equation of many-body perturbation theory (MBPT) as implemented in Yambo code. The band structure results show the semiconducting behaviour of Bi2Se3. Taken into account the effects of electron-hole interaction by solving Bethe-Salpeter equation, the calculated optical properties are in better agreement with available experimental results. The exciton energy shows that the title material can absorb light within infrared region. Asian Research Publishing Network 2017 Article PeerReviewed application/pdf en http://eprints.utm.my/id/eprint/75372/1/AbdullahiLawal_ElectronicandOpticalPropertiesofBi2Se3.pdf Lawal, A. and Shaari, A. and Ahmed, R. and Ali, M. H. and Jarkoni, N. (2017) Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector. ARPN Journal of Engineering and Applied Sciences, 12 (21). pp. 5880-5886. ISSN 1819-6608 https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034439809&partnerID=40&md5=de0e2b8b8caf015853e4a72c2d697ef4 |
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QC Physics Lawal, A. Shaari, A. Ahmed, R. Ali, M. H. Jarkoni, N. Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector |
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Bismuth selenide (Bi2Se3) is a van der Waals compound which has been excellently reported as thermoelectric material. Linear dispersion near Fermi energy level is an exciting feature to consider, a promising candidate for photonic device within broadband wavelengths. For this application, detailed knowledge of its structural, electronic and optical properties is very essential. The electronic properties were determined by density functional theory (DFT) calculations implemented in Quantum-Espresso simulation package which uses plane wave basis and pseudopotential for the core electrons. Optical properties are computed by solving Bethe-Salpeter equation of many-body perturbation theory (MBPT) as implemented in Yambo code. The band structure results show the semiconducting behaviour of Bi2Se3. Taken into account the effects of electron-hole interaction by solving Bethe-Salpeter equation, the calculated optical properties are in better agreement with available experimental results. The exciton energy shows that the title material can absorb light within infrared region. |
format |
Article |
author |
Lawal, A. Shaari, A. Ahmed, R. Ali, M. H. Jarkoni, N. |
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Lawal, A. Shaari, A. Ahmed, R. Ali, M. H. Jarkoni, N. |
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Lawal, A. |
title |
Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector |
title_short |
Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector |
title_full |
Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector |
title_fullStr |
Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector |
title_full_unstemmed |
Electronic and optical properties of Bi2Se3 topological insulator: a promising absorbing layer for broadband photodetector |
title_sort |
electronic and optical properties of bi2se3 topological insulator: a promising absorbing layer for broadband photodetector |
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Asian Research Publishing Network |
publishDate |
2017 |
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http://eprints.utm.my/id/eprint/75372/1/AbdullahiLawal_ElectronicandOpticalPropertiesofBi2Se3.pdf http://eprints.utm.my/id/eprint/75372/ https://www.scopus.com/inward/record.uri?eid=2-s2.0-85034439809&partnerID=40&md5=de0e2b8b8caf015853e4a72c2d697ef4 |
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