Izvestiya of Saratov University.

Physics

ISSN 1817-3020 (Print)
ISSN 2542-193X (Online)


For citation:

Sagaidachnaya E. A., Kochubey V. I. Effect of the Temperature of NaYF4 : Er,Yb Upсonversion Particles on the Formation of Luminescence. Izvestiya of Sarat. Univ. Physics. , 2020, vol. 20, iss. 4, pp. 306-310. DOI: 10.18500/1817-3020-2020-20-4-306-310

This is an open access article distributed under the terms of Creative Commons Attribution 4.0 International License (CC-BY 4.0).
Published online: 
30.11.2020
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English
UDC: 
535.372:535.373.2

Effect of the Temperature of NaYF4 : Er,Yb Upсonversion Particles on the Formation of Luminescence

Autors: 
Sagaidachnaya Elena Aleksandrovna, Saratov State University
Kochubey Vyacheslav Ivanovich, Saratov State University
Abstract: 

The intensity of upconversion luminescence depends nonlinearly on the excitation intensity. The aim of this work is to study the effect of the temperature of NaYF4:Er,Yb upconversion particles on the dependence of the luminescence intensity on the excitation intensity. The synthesized particles were observed to have the shape of a hexagonal prism with a width of about 440 nm and a height of 445 nm. The upconversion luminescence spectra were obtained in the temperature range of 22–55° C with the excitation intensity in the range of 1.5–9.4 W/cm2. The obtained results show the green-band luminescence photons can be generated by means of two-step and three-step mechanisms: the contribution of these mechanisms depends on the temperature of the particles. As the temperature increases, the contribution of the three-stage mechanism of green luminescence excitation is enhanced.

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