Issue 20, 2024

Molecular phosphorescence enhancement by the plasmon field of metal nanoparticles

Abstract

A theoretical model is proposed that allows the estimation of the quantum yield of phosphorescence of dye molecules in the vicinity of plasmonic nanoparticles. For this purpose, the rate constants of the radiative and nonradiative intramolecular transitions for rhodamine 123 (Rh123) and brominated rhodamine (Rh123-2Br) dyes have been calculated. The plasmon effect of Ag nanoparticles on various types of luminescence processes has been studied both theoretically and experimentally. We show that in the presence of a plasmonic nanoparticle, the efficiency of the immediate and delayed fluorescence increases significantly. The phosphorescence rate of the rhodamine dyes also increases near plasmonic nanoparticles. The long-lived luminescence i.e., delayed fluorescence and phosphorescence is more enhanced for Rh123-2Br than for Rh123. The largest phosphorescence quantum yield is obtained when the dye molecule is at a distance of 4–6 nm from the nanoparticle surface. Our results can be used in the design of plasmon-enhancing nanostructures for light-emitting media, organic light-emitting diodes, photovoltaic devices, and catalysts for activation of molecular oxygen.

Graphical abstract: Molecular phosphorescence enhancement by the plasmon field of metal nanoparticles

Supplementary files

Article information

Article type
Paper
Submitted
27 Marts 2024
Accepted
26 Apr. 2024
First published
13 Maijs 2024
This article is Open Access
Creative Commons BY license

Phys. Chem. Chem. Phys., 2024,26, 14624-14636

Molecular phosphorescence enhancement by the plasmon field of metal nanoparticles

N. Kh. Ibrayev, R. R. Valiev, E. V. Seliverstova, E. P. Menshova, R. T. Nasibullin and D. Sundholm, Phys. Chem. Chem. Phys., 2024, 26, 14624 DOI: 10.1039/D4CP01281J

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements