Novel Orange-Emitting YPO 4 :Sm 3+ /Polymer Nanocomposite Phosphor Films for LED Applications.

Autor: Mebarki L; Laboratory of Physical-Chemistry, University of Bejaia, 06000, Bejaia, Algeria., Kahouadji B; Department of Technology (El Kseur Campus), Laboratory of Physical-Chemistry, University of Bejaia, 06000, Bejaia, Algeria. badis.kahouadji@univ-bejaia.dz., Zoukel A; Technical Platform of Physico-Chemical Analysis (PTAPC-Laghouat-CRAPC), Laghouat, Algeria.; Laboratory Physico-Chemistry of Materials, Technical Platform of Physico-Chemical Analysis (PTAPC-Laghouat-CRAPC), Laghouat University, Laghouat, Algeria., Benharrat L; Research Center in Semiconductors Technology for Energy-CRTSE, 02, Bd. Dr. Frantz Fanon, B.P. 1407 Merveilles, 16038, Algiers, Algeria., Prakash J; Department of Chemistry, National Institute of Technology Hamirpur, (H.P.)-177005, Hamirpur, India.; Department of Physics, University of the Free State, Bloemfontein, ZA9300, South Africa., Ouhenia S; Laboratory of Physical-Chemistry, University of Bejaia, 06000, Bejaia, Algeria., Souici A; Laboratory of Physical-Chemistry, University of Bejaia, 06000, Bejaia, Algeria., Delaey M; Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1 B-9000, Ghent, Belgium., Guerbous L; Laser Department/ Nuclear Research Centre of Algiers (CRNA), 02, Boulevard Frantz Fanon, B.P. 399, 16000, Algiers, Algeria., Poelman D; Department of Solid State Sciences, Ghent University, Krijgslaan 281-S1 B-9000, Ghent, Belgium., Swart HC; Department of Physics, University of the Free State, Bloemfontein, ZA9300, South Africa.
Jazyk: angličtina
Zdroj: Journal of fluorescence [J Fluoresc] 2024 Sep 10. Date of Electronic Publication: 2024 Sep 10.
DOI: 10.1007/s10895-024-03915-2
Abstrakt: A polymer based nanocomposite (NC) material embedded with highly luminescent nanopowders could be promising for replacing traditional luminescent materials from a technological point of view. In this study, we have successfully obtained YPO 4 : Sm 3+ /Polymer nanocomposite phosphor films by embedding YPO 4 : Sm 3+ luminescent nanoparticles (NPs) for orange-light emitting diode (LED) applications. These luminescent NPs were synthesized using the sol gel method in different polymer matrices i.e. polystyrene (PS) and poly (methyl methacrylate) (PMMA) by using direct solution mixing. The structural, morphological, and photoluminescence characteristics of the nano-phosphors and resulting NC films were examined and discussed. The emission spectra of YPO 4 : Sm 3+ (x at.%) nano-phosphors under near-UV excitation at 404 nm were dominated by orange emission attributed to 6 H 5/2 →   4 F 7/2 (601 nm) luminescence of Sm 3+ ions. The optimum doping concentration of activator Sm 3+ in YPO 4 matrix was found to be 5 at.%. When the doping concentration of Sm 3+ was higher than 5 at.%, concentration quenching occurred. The incorporation of YPO 4 : Sm 3+ NPs into polymer matrices indicated that the NCs retained the original luminescence properties of the luminescent NPs, although a decrease in their emission intensity was observed for the NC films, attributable to a polymer matrix effect, which dominated in PS matrix. The fluorescence decay times of NPs in the NC films were measured and compared to those of proper YPO 4 : Sm 3+ nano-phosphors. A decrease in decay time in NC film was observed due the effective refractive index effect. Temperature-dependent photoluminescence (TDPL) of PMMA NC film was studied in 100-400 K range, investigating the thermal stability of the film. Additionally, CIE coordinates confirmed the red-orange light emission of the prepared phosphors and NC films. The obtained results indicate that the synthesized polymer-nanophosphor NC films are promising candidates for orange-LED applications.
(© 2024. The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.)
Databáze: MEDLINE
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