Oxidized Graphite Nanocrystals for White Light Emission
Crystals 2024
Patrik Ščajev, Artūrs Medvids, Saulius Miasojedova, lgirdas Mekys, Gediminas Kreiza, Justinas Čeponkus, Valdas Šablinskas, Tadas Malinauskas

We investigated the formation of graphite nanocrystals covered with graphite oxide for white light generation. The nanoparticles were formed using cost-efficient oxidation of a carbon-based dye pigment at different temperatures and verified using X-ray diffraction and Raman measurements. Formation of the graphite nanoparticles via thermal annealing was observed, while their light emission increased at higher oxidation temperatures. This was associated with a higher amount of oxygen defect groups. The time-resolved photoluminescence measurements showed linearly faster decays at shorter wavelengths and similar decays at different annealing temperatures. Broadband and linear vs. excitation emission spectra of the particles were found to be suitable for white-light-emitting devices and phosphor markers. The fast photoluminescence decay opens the possibility for the application of nanoparticles in optical wireless communication technology.


Keywords
Nanocrystals, photoluminescence, Oxidized Graphite, White Light
DOI
10.3390/cryst14060505
Hyperlink
https://www.mdpi.com/2073-4352/14/6/505

Ščajev, P., Medvids, A., Miasojedova, S., Mekys, l., Kreiza, G., Čeponkus, J., Šablinskas, V., Malinauskas, T. Oxidized Graphite Nanocrystals for White Light Emission. Crystals, 2024, Vol. 14, No. 6, Article number 505. e-ISSN 2073-4352. Pieejams: doi:10.3390/cryst14060505

Publication language
English (en)
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