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Currently, the plasmonic effects in metal nanoparticles are used, for example, to improve the characteristics of light-emitting diodes (LEDs). One of the new directions may be the use of plasmonic properties of nanoparticles to improve the characteristics of wireless optical networks, in which LEDs are used for the data transfer (Li-Fi networks). The use of the metal nanoparticles with dielectric shells to accelerate modulation of LEDs and as a result to increase the data transfer rate in the wireless optical networks due to an increase in the transition rates in a nanocrystal, located near the nanoparticle surface, has been considered. The dependences of radiative and nonradiative transition rates in a nanocrystal on the emission wavelength have been studied for various diameters of the metal core and shell thicknesses. It has been shown that by setting the optimal configuration of a nanoparticle with shell it is possible to create conditions, under which the increase in the radiative transition rates at the emission wavelength of a nanocrystal will significantly exceed the increase in the nonradiative transition rates, which allows one to accelerate the modulation of LEDs without losing their energy efficiency as the light sources. The results obtained in this work can be used both for studying the fluorescence of molecules and nanocrystals near the nanoparticles and to improve the performance of Li-Fi optical data networks.

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