Bibliographic citations
Puga, R., (2021). Generación de luz blanca mediante procesos de Upconversion en cristales de NaYF4 tridopados con iones de YB3+ / Ho3+ /Tm3+ excitados con radiación NIR de 980 nm [Tesis, Universidad Nacional de Ingeniería]. http://hdl.handle.net/20.500.14076/22518
Puga, R., Generación de luz blanca mediante procesos de Upconversion en cristales de NaYF4 tridopados con iones de YB3+ / Ho3+ /Tm3+ excitados con radiación NIR de 980 nm [Tesis]. PE: Universidad Nacional de Ingeniería; 2021. http://hdl.handle.net/20.500.14076/22518
@mastersthesis{renati/267650,
title = "Generación de luz blanca mediante procesos de Upconversion en cristales de NaYF4 tridopados con iones de YB3+ / Ho3+ /Tm3+ excitados con radiación NIR de 980 nm",
author = "Puga Correa, Rubén Ciro",
publisher = "Universidad Nacional de Ingeniería",
year = "2021"
}
Upconversion is a non-linear optical phenomenon by which in certain materials we obtain emissions of electromagnetic radiation in the range of visible light when they are excited with light of wavelength in the infrared region. In particular, this phenomenon occurs in crystals doped with lanthanide ions when excited with NIR radiation so that we obtain emissions in the visible range. As an application of this phenomenon we look for the generation of white light and for this NaY F4 crystals tri-doped with Y b3+, Ho3+ and Tm3+ ions were synthesized by solvothermal method with the idea that the emission bands by Upconversion of the Ho and Tm provide the three basic colors necessary to generate white light. Additionally, we investigated the effect on the chromaticity of the emissions in the sample due to the variation in concentration of the Y b3+ ion (10 %, 20 % and 30 %) in the crystal. The material was structurally characterized by X-ray diffraction and the optical characterization was carried out by taking absorption spectra and diffuse reflectance of the samples in the spectral range of 400 to 1300 nm. We registered Upconversion emission spectra in the visible range and Downconversion emission spectra in the infrared, both under excitation with a 980 nm laser and 0.8 W of power. Chromaticity of the samples was characterized using the CIE 1931 standard colorimetric system, the color coordinates and chromaticity diagrams.
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