Skip to main content

Research Repository

Advanced Search

Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions

Balakrishnan, Nilanthy; Kudrynskyi, Zakhar R.; Fay, Mike W.; Mudd, Garry W.; Svatek, Simon A.; Makarovsky, Oleg; Kovalyuk, Zakhar D.; Eaves, Laurence; Beton, Peter H.; Patan�, Amalia

Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions Thumbnail


Authors

Nilanthy Balakrishnan

ZAKHAR KUDRYNSKYI ZAKHAR.KUDRYNSKYI@NOTTINGHAM.AC.UK
Nottingham Research Anne Mclaren Fellows

Garry W. Mudd

Simon A. Svatek

Zakhar D. Kovalyuk

PETER BETON peter.beton@nottingham.ac.uk
Professor of Physics



Abstract

Room temperature electroluminescence from semiconductor junctions is demonstrated. The junctions are fabricated by the exfoliation and direct mechanical adhesion of InSe and GaSe van der Waals layered crystals. Homojunction diodes formed from layers of p- and n-type InSe exhibit electroluminescence at energies close to the bandgap energy of InSe (Eg= 1.26 eV). In contrast, heterojunction diodes formed by combining layers of p-type GaSe and n-type InSe emit photons at lower energies, which is attributed to the generation of spatially indirect excitons and a staggered valence band lineup for the holes at the GaSe/InSe interface. These results demonstrate the technological potential of mechanically formed heterojunctions and homojunctions of direct-bandgap layered GaSe and InSe compounds with an optical response over an extended wavelength range, from the near-infrared to the visible spectrum.

Citation

Balakrishnan, N., Kudrynskyi, Z. R., Fay, M. W., Mudd, G. W., Svatek, S. A., Makarovsky, O., …Patanè, A. (2014). Room Temperature Electroluminescence from Mechanically Formed van der Waals III-VI Homojunctions and Heterojunctions. Advanced Optical Materials, 2(11), 1064-1069. https://doi.org/10.1002/adom.201400202

Journal Article Type Article
Acceptance Date Aug 20, 2014
Online Publication Date Aug 20, 2014
Publication Date 2014-11
Deposit Date Feb 16, 2016
Publicly Available Date Mar 29, 2024
Journal Advanced Optical Materials
Electronic ISSN 2195-1071
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 2
Issue 11
Pages 1064-1069
DOI https://doi.org/10.1002/adom.201400202
Keywords Metal chalcogenides; Electroluminescence; van der Waals, Crystals; Homojunctions; Heterojunctions
Public URL https://nottingham-repository.worktribe.com/output/993844
Publisher URL http://onlinelibrary.wiley.com/doi/10.1002/adom.201400202/abstract;jsessionid=FB7C91F2B9DFAC16749672B820F55CCC.f04t02

Files





You might also like



Downloadable Citations