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Epitaxial growth of γ-InSe and α, β, and γ-In2Se3 on ε-GaSe

Balakrishnan, Nilanthy; Steer, Elisabeth D.; Smith, Emily F.; Kudrynskyi, Zakhar R.; Kovalyuk, Zakhar D.; Eaves, Laurence; Patanè, Amalia; Beton, Peter H.

Authors

Nilanthy Balakrishnan

Elisabeth D. Steer

Emily F. Smith

Zakhar D. Kovalyuk



Abstract

We demonstrate that γ-InSe and the α, β and γ phases of In2Se3 can be grown epitaxially on ε-GaSe substrates using a physical vapour transport method. By exploiting the temperature gradient within the tube furnace, we can grow selectively different phases of InxSey depending on the position of the substrate within the furnace. The uniform cleaved surface of ε-GaSe enables the epitaxial growth of the InxSey layers, which are aligned over large areas. The InxSey epilayers are characterised using Raman, photoluminescence, X-ray photoelectron and electron dispersive X-ray spectroscopies. Each InxSey phase and stoichiometry exhibits distinct optical and vibrational properties, providing a tuneable photoluminescence emission range from 1.3 eV to ~ 2 eV suitable for exploitation in electronics and optoelectronics.

Journal Article Type Article
Publication Date Jun 1, 2018
Journal 2D Materials
Electronic ISSN 2053-1583
Publisher IOP Publishing
Peer Reviewed Peer Reviewed
Volume 5
Issue 3
APA6 Citation Balakrishnan, N., Steer, E. D., Smith, E. F., Kudrynskyi, Z. R., Kovalyuk, Z. D., Eaves, L., …Beton, P. H. (2018). Epitaxial growth of γ-InSe and α, β, and γ-In2Se3 on ε-GaSe. 2D Materials, 5(3), https://doi.org/10.1088/2053-1583/aac479
DOI https://doi.org/10.1088/2053-1583/aac479
Keywords Indium Selenide, III-VI van der Waals layered crystals, 2D materials, physical vapour transport
Publisher URL http://iopscience.iop.org/article/10.1088/2053-1583/aac479
Copyright Statement Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://creativecommons.org/licenses/by/4.0


Balakrishnan_2018_2D_Mater._5_035026.pdf (2 Mb)
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