A1 Journal article (refereed)
Making Graphene Luminescent by Direct Laser Writing (2020)

Hiltunen, V.-M., Koskinen, P. J., Mentel, K. K., Manninen, J., Myllyperkiö, P., Johansson, A., & Pettersson, M. (2020). Making Graphene Luminescent by Direct Laser Writing. Journal of Physical Chemistry C, 124(15), 8371-8377. https://doi.org/10.1021/acs.jpcc.0c00194

JYU authors or editors

Publication details

All authors or editors: Hiltunen, Vesa-Matti; Koskinen, Pekka Johannes; Mentel, Kamila K.; Manninen, Jyrki; Myllyperkiö, Pasi; Johansson, Andreas; Pettersson, Mika

Journal or series: Journal of Physical Chemistry C

ISSN: 1932-7447

eISSN: 1932-7455

Publication year: 2020

Volume: 124

Issue number: 15

Pages range: 8371-8377

Publisher: American Chemical Society

Publication country: United States

Publication language: English

DOI: https://doi.org/10.1021/acs.jpcc.0c00194

Publication open access: Not open

Publication channel open access:

Publication is parallel published (JYX): https://jyx.jyu.fi/handle/123456789/68363

Abstract

Graphene is not intrinsically luminescent, due to a lack of bandgap, and methods for its creation are tricky for device fabrication. In this study, we create luminescent graphene patterns by a simple direct laser writing method. We analyze the graphene using Raman spectroscopy and find that the laser writing leads to generation of line defects after initial formation of point defects. This Raman data enables us to create a model that explains the luminescence by a formation of small domains due to confinement of graphene by line defects, which is conceptually similar to the mechanism of luminescence in graphene quantum dots.

Keywords: laser technology; luminescence; spectroscopy

Free keywords: Raman spectroscopy

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Ministry reporting: Yes

Reporting Year: 2020

JUFO rating: 2