Development of Y2O3:Eu3+ materials doped with variable Gd3+ content and characterization of their photoluminescence properties under UV excitation

Martins, Felipe Cabral Borges; Firmino, Eduarda; Oliveira, Lorrane Santos de; Dantas, Noélio O.; Silva, A.C. Almeida; Barbosa, Helliomar P.; Rezende, Thaís K. L.; Góes, Márcio Sousa; Santos, M.A. Coutos dos; Oliveira, Luiz Fernando Cappa de; Ferrari, Jefferson Luis

doi:10.1016/j.matchemphys.2021.125498

Cited by 8 publications

(3 citation statements)

References 56 publications

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“…Meanwhile, compounds containing a significant amount of gadolinium ions also demonstrate larger emission intensity than NaY 0.98 Sm 0.02 F 4 . A similar effect was observed by Martins and co-workers [ 66 ] where co-doping of Y 2 O 3 : Eu 3+ by Gd 3+ ions resulted in an increase in the emission intensity. They explain this phenomenon of partial absorption by the host Gd 2 O 3 matrix followed by the energy transfer to Gd 3+ ion, and then from Gd 3+ to Eu 3+ ion.…”

Section: Resultssupporting

confidence: 86%

Effect of Gd3+, La3+, Lu3+ Co-Doping on the Morphology and Luminescent Properties of NaYF4:Sm3+ Phosphors

et al. 2023

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The series of luminescent NaYF4:Sm3+ nano- and microcrystalline materials co-doped by La3+, Gd3+, and Lu3+ ions were synthesized by hydrothermal method using rare earth chlorides as the precursors and citric acid as a stabilizing agent. The phase composition of synthesized compounds was studied by PXRD. All synthesized materials except ones with high La3+ content (where LaF3 is formed) have a β-NaYF4 crystalline phase. SEM images demonstrate that all particles have shape of hexagonal prisms. The type and content of doping REE significantly effect on the particle size. Upon 400 nm excitation, phosphors exhibit distinct emission peaks in visible part of the spectrum attributed to 4G5/2→6HJ transitions (J = 5/2–11/2) of Sm3+ ion. Increasing the samarium (III) content results in concentration quenching by dipole–dipole interactions, the optimum Sm3+concentration is found to be of 2%. Co-doping by non-luminescent La3+, Gd3+ and Lu3+ ions leads to an increase in emission intensity. This effect was explained from the Sm3+ local symmetry point of view.

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Section: Resultssupporting

confidence: 86%

Effect of Gd3+, La3+, Lu3+ Co-Doping on the Morphology and Luminescent Properties of NaYF4:Sm3+ Phosphors

et al. 2023

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“…Figure 3 a shows the ball‐and‐stick model of Y 2 O 3 ; it is a corundum like structure and crystallizes in the cubic I

D = \frac{K \lambda}{\beta \text{cos&amp;#x00026;amp;amp;amp;amp;amp;amp;theta;}}

3 space group. [ 48 ] Upon doping, the Eu 3+ ions occupy the sites of Y atoms. To investigate the phase of the prepared NP, the XRD pattern of undoped Y 2 O 3 and Y 2 O 3 : Eu (3 mol%) has been recorded and shown in Figure 3b.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Optimization of Europium‐Doped Yttria for Photoluminescence and Triboelectric Nanogenerator Applications

Zawar,

Mishra,

Rakshita

et al. 2024

Energy Tech

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In recent years, multifunctional applications of the same material have gained wide recognition in various fields. The present study reports the synthesis, characterization, and multifunctional applications of europium (Eu)‐doped yttrium oxide (Y2O3) nanophosphor. Synergistic optimization of Eu‐doped Y2O3 results in enhanced photoluminescence (PL) and triboelectric nanogenerator (TENG) performance. Eu‐doped Y2O3 nanophosphors are synthesized using an autocombustion method, and comprehensive characterizations are conducted. The investigations indicate that the Eu doping significantly influences the PL intensity, with the highest emission observed at 3 mol% for powders. The synthesized nanophosphors are blended with silicone to fabricate hybrid films, which are utilized for energy harvesting applications using TENG technology. The TENG devices fabricated with these hybrid films demonstrate a notable relationship between the Eu concentration and the electrical output, achieving peak performance at 1 mol% Eu doping. The maximum output voltage of ≈535 V, short‐circuit current of ≈38 μA, and power density of 800 mW m−2 are observed. Further, TENG is demonstrated in a self‐powered UV photodetector application. The present results contribute to the improvement of sustainable energy technologies and open up a new window for multifunctional materials.

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“…Among thin films, considerable attention is paid to the study of thin Y 2 O 3 films activated by rare earth ions (REIs). In this regard, Y 2 O 3 :Eu 3 , a highly efficient phosphor emitting in the red region of the optical spectrum, is the most widely studied [1][2][3]. Due to the linear dependence of the glow brightness on the current density and excitation energy, the Y 2 O 3 :Eu phosphor is widely used as a red component of projection televisions, in the creation of flat vacuum fluorescent displays (VFDs) and field emission displays (FEDs) [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Surface Morphology of Y2O3:Eu Thin Films at Different Activator Concentrations

2022

Nanosistemi, Nanomateriali, Nanotehnologii

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Atomic force microscopy is used to study the surface morphology of thin Y 2 O 3 :Eu films obtained by the radio-frequency ion-plasma sputtering with an activator concentration of 1.0, 2.5, and 5 mol.%. Based on the analysis of the obtained results, an almost linear dependence of the sizes of surface structures on the value of the activator concentration and a superlinear increase in both the root-mean-square surface roughness and the average distance between grains are revealed. The obtained results are discussed.Методою атомно-силової мікроскопії (АСМ) досліджено морфологію поверхні тонких плівок Y 2 O 3 :Eu, одержаних методою високочастотного (ВЧ) йонно-плазмового розпорошення, з концентрацією активатора у 1,0, 2,5 та 5 мол.%. На основі аналізи одержаних результатів встановлено практично лінійну залежність розмірів поверхневих структур від величини концентрації активатора та надлінійне зростання середньоквадратичної шерсткости поверхні та середньої віддалі між зернами. Проведено обговорення одержаних результатів.

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Development of Y2O3:Eu3+ materials doped with variable Gd3+ content and characterization of their photoluminescence properties under UV excitation

Cited by 8 publications

References 56 publications

Effect of Gd3+, La3+, Lu3+ Co-Doping on the Morphology and Luminescent Properties of NaYF4:Sm3+ Phosphors

Effect of Gd3+, La3+, Lu3+ Co-Doping on the Morphology and Luminescent Properties of NaYF4:Sm3+ Phosphors

Synergistic Optimization of Europium‐Doped Yttria for Photoluminescence and Triboelectric Nanogenerator Applications

Surface Morphology of Y2O3:Eu Thin Films at Different Activator Concentrations

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