Efficient green emission from edge states in graphene perforated by nitrogen plasma treatment

0511105 - FZÚ 2020 RIV GB eng J - Článek v odborném periodiku
Kovaleva, N. N. - Chvostová, Dagmar - Potůček, Zdeněk - Cho, H. D. - Fu, X. - Fekete, Ladislav - Pokorný, Jan - Bryknar, Z. - Kugel, K.I. - Dejneka, Alexandr - Kang, T. W. - Panin, G.N. - Kusmartsev, F.V.
Efficient green emission from edge states in graphene perforated by nitrogen plasma treatment.
2D Materials. Roč. 6, č. 4 (2019), s. 1-10, č. článku 045021. ISSN 2053-1583. E-ISSN 2053-1583
Grant CEP: GA MŠMT(CZ) EF16_019/0000760; GA MŠMT(CZ) LO1409; GA MŠMT(CZ) LM2015088
Grant ostatní: OP VVV - SOLID21(XE) CZ.02.1.01/0.0/0.0/16_019/0000760
Institucionální podpora: RVO:68378271
Klíčová slova: perforated graphene * plasma treatment * photoluminescence * edge defects * graphene surface morphology
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 7.140, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1088/2053-1583/ab2ee9

Plasma functionalization of graphene is one of the facile ways to tune its doping level without the need for wet chemicals making graphene photoluminescent. Microscopic corrugations in the twodimensional structure of bilayer CVD graphene having a quasi-free-suspended top layer, such as graphene ripples, nanodomes, and bubbles, may significantly enhance local reactivity leading to etching effects on exposure to plasma. Here, we discovered that bilayer CVD graphene treated with nitrogen plasma exhibits efficient UV-green-red emission, where the excitation at 250 nm leads to photoluminescence with the peaks at 390, 470, and 620 nm, respectively. By using Raman scattering and spectroscopic ellipsometry, we investigated doping effects induced by oxygen or nitrogen plasma on the optical properties of single- and bilayer CVD graphene.
Trvalý link: http://hdl.handle.net/11104/0301426