Optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature

Abstract Optimizing upconversion (UC) composites is challenging as numerous effects influence their unique emission mechanism. Low scattering mediums increase the number of dopants excited, however, high scattering mediums increase the UC efficiency due to its non-linear power dependency. Scattering...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Callum M. S. Jones, Daniel Biner, Stavros Misopoulos, Karl W. Krämer, Jose Marques-Hueso
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/47e2684be2784e31b1a120f1fca7ef09
Etiquetas:	Agregar Etiqueta Sin Etiquetas, Sea el primero en etiquetar este registro!

id	oai:doaj.org-article:47e2684be2784e31b1a120f1fca7ef09
record_format	dspace
spelling	oai:doaj.org-article:47e2684be2784e31b1a120f1fca7ef092021-12-02T18:34:13ZOptimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature10.1038/s41598-021-93400-82045-2322https://doaj.org/article/47e2684be2784e31b1a120f1fca7ef092021-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-93400-8https://doaj.org/toc/2045-2322Abstract Optimizing upconversion (UC) composites is challenging as numerous effects influence their unique emission mechanism. Low scattering mediums increase the number of dopants excited, however, high scattering mediums increase the UC efficiency due to its non-linear power dependency. Scattering also leads to greater thermal effects and emission saturation at lower excitation power density (PD). In this work, a photoluminescence quantum yield (PLQY) increase of 270% was observed when hexagonal NaYF4:(18%)Yb3+,(2%)Er3+ phosphor is in air compared to a refractive index-matched medium. Furthermore, the primary inner-filter effect causes a 94% PLQY decrease when the excitation focal point is moved from the front of the phosphor to 8.4 mm deep. Increasing this effect limits the maximum excitation PD, reduces thermal effects, and leads to emission saturation at higher excitation PDs. Additionally, self-absorption decreases the PLQY as the phosphor’s thickness increases from 1 to 9 mm. Finally, in comparison to a cuboid cuvette, a 27% PLQY increase occurs when characterizing the phosphor in a cylindrical cuvette due to a lensing effect of the curved glass, as supported by simulations. Overall, addressing the effects presented in this work is necessary to both maximize UC composite performance as well as report their PLQY more reliably.Callum M. S. JonesDaniel BinerStavros MisopoulosKarl W. KrämerJose Marques-HuesoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Callum M. S. Jones Daniel Biner Stavros Misopoulos Karl W. Krämer Jose Marques-Hueso Optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature
description	Abstract Optimizing upconversion (UC) composites is challenging as numerous effects influence their unique emission mechanism. Low scattering mediums increase the number of dopants excited, however, high scattering mediums increase the UC efficiency due to its non-linear power dependency. Scattering also leads to greater thermal effects and emission saturation at lower excitation power density (PD). In this work, a photoluminescence quantum yield (PLQY) increase of 270% was observed when hexagonal NaYF4:(18%)Yb3+,(2%)Er3+ phosphor is in air compared to a refractive index-matched medium. Furthermore, the primary inner-filter effect causes a 94% PLQY decrease when the excitation focal point is moved from the front of the phosphor to 8.4 mm deep. Increasing this effect limits the maximum excitation PD, reduces thermal effects, and leads to emission saturation at higher excitation PDs. Additionally, self-absorption decreases the PLQY as the phosphor’s thickness increases from 1 to 9 mm. Finally, in comparison to a cuboid cuvette, a 27% PLQY increase occurs when characterizing the phosphor in a cylindrical cuvette due to a lensing effect of the curved glass, as supported by simulations. Overall, addressing the effects presented in this work is necessary to both maximize UC composite performance as well as report their PLQY more reliably.
format	article
author	Callum M. S. Jones Daniel Biner Stavros Misopoulos Karl W. Krämer Jose Marques-Hueso
author_facet	Callum M. S. Jones Daniel Biner Stavros Misopoulos Karl W. Krämer Jose Marques-Hueso
author_sort	Callum M. S. Jones
title	Optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature
title_short	Optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature
title_full	Optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature
title_fullStr	Optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature
title_full_unstemmed	Optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature
title_sort	optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/47e2684be2784e31b1a120f1fca7ef09
work_keys_str_mv	AT callummsjones optimizedphotoluminescencequantumyieldinupconversioncompositesconsideringthescatteringinnerfiltereffectsthicknessselfabsorptionandtemperature AT danielbiner optimizedphotoluminescencequantumyieldinupconversioncompositesconsideringthescatteringinnerfiltereffectsthicknessselfabsorptionandtemperature AT stavrosmisopoulos optimizedphotoluminescencequantumyieldinupconversioncompositesconsideringthescatteringinnerfiltereffectsthicknessselfabsorptionandtemperature AT karlwkramer optimizedphotoluminescencequantumyieldinupconversioncompositesconsideringthescatteringinnerfiltereffectsthicknessselfabsorptionandtemperature AT josemarqueshueso optimizedphotoluminescencequantumyieldinupconversioncompositesconsideringthescatteringinnerfiltereffectsthicknessselfabsorptionandtemperature
_version_	1718377856455671808

Optimized photoluminescence quantum yield in upconversion composites considering the scattering, inner-filter effects, thickness, self-absorption, and temperature

Ejemplares similares