Photoluminescence properties of Eu 3+ -and Tb 3+ -doped YAlO 3 phosphors for white LED applications

Park, K.; Kim, H.; Hakeem, D.A.

doi:10.1016/j.ceramint.2016.03.150

Cited by 29 publications

(8 citation statements)

References 20 publications

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“…XRD patterns of all the synthesized doped samples are shown in Figure 2a. All XRD profiles are precisely matched with JCPDS number 38‐0222, affirming that the host framework's symmetry is maintained even after the inclusion of Tb 3+ ions [34, 35]. Generally, shifting and broadening in the diffraction lines are attributed to the strain in the synthesized doped samples.…”

Section: Resultsmentioning

confidence: 57%

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

et al. 2023

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Terbium(III)‐doped yttrium aluminate perovskite (YAP:xTb3+) (x = 0.01–0.08 mol) was synthesized using a simple gel‐combustion method. Structural elucidations were performed using X‐ray diffraction (XRD) and Rietveld analysis. Fourier‐transform infrared spectral studies validated the efficient synthesis of designed doped samples. Transmission electron microscopic images showed the agglomerated irregular dimensions of the synthesized nanocrystalline materials. When excited at 251 nm, a strong emissive line attributed to 5D4 → 7F5 electronic transition was observed at 545 nm (green emission). The maximum luminescence was found at the optimized concentration (0.05 mol) of Tb3+ ions; this emission was quenched by dipolar–dipolar (d–d) interactions. Chromaticity (x and y) and correlated colour temperature parameters were obtained by analysing the emission profiles. Finally, the colour coordinates of nanophosphors were closer to the National Television Standards Committee green coordinates, which replicates their potency in the design and architecture of R‐G‐B‐based white LEDs.

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Section: Resultsmentioning

confidence: 57%

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

et al. 2023

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“…The ratio of the emission intensity caused by the 5 D 0 → 7 F 2 to 5 D 0 → 7 F 1 transition of Eu 3 + ions was found out to be 1.4. The ratio is a measure of the site symmetry of Eu 3 + and provides red color purity . The emission intensity caused by the 5 D 0 → 7 F 2 transition is stronger than that caused by the 5 D 0 → 7 F 1 transition, indicating its usefulness as a red‐emitting phosphor under ultraviolet (UV) excitation.…”

Section: Resultsmentioning

confidence: 99%

Synthesis and luminescence characterization of Y₂BaZnO₅:RE (RE = Eu³⁺, Tb³⁺, Pr³⁺ and Sm³⁺) phosphors

Taikar¹,

Joshi²,

Moharil

2016

Luminescence

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Modified synthesis and luminescence of Y BaZnO phosphors activated with the rare earths (RE) Eu , Tb , Pr and Sm are reported. RE BaZnO phosphors have attracted attention because of their interesting magnetic and optical properties; and are usually prepared using a two-step solid-state reaction. In the first step, carbonates or similar precursors are thoroughly mixed and heated at 900°C to decompose them to oxides. To eliminate the unwanted phases like BaRE O , the resulting powders are reheated at 1100°C for a long time. We prepared Y BaZnO phosphors activated with various activators by replacing the first step with combustion synthesis. The photoluminescence results are presented. The photoluminescence results for Eu , Tb and Pr are in good agreement with the literature. However, photoluminescence emission from Sm has not been documented previously. The excitation spectrum of Eu is dominated by a charge transfer band around 261 nm, and an additional band around 238 nm is always present, irrespective of the type of activator. The presence of this band for all these different types of activators was interpreted as host absorption.

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“…[37,38]. They have been synthesized through a variety of physical and chemical techniques, including: Hidrothermal/Solvothermal [39,40,41], solid-state reaction [42], sol-gel [43,44], laser ablation [45,46], sputtering [47], Pechini Method [48], plasma electrolitic oxidation [49], conventional melt-quenching method [50,51], combustion synthesis [52], solvent evaporation method [53,54,55], and co-precipitation process [56]. Among these techniques, spray pyrolysis began to be used for this purpose in the mid-1980s, and it is still used today [57,58]—proving to be a practical, low cost, easy to extrapolate for large area deposition technique.…”

Section: Luminescent Materialsmentioning

confidence: 99%

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

2018

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The spray pyrolysis technique has been extensively used to synthesize materials for a wide variety of applications such as micro and sub-micrometer dimension MOSFET´s for integrated circuits technology, light emitting devices for displays, and solid-state lighting, planar waveguides and other multilayer structure devices for photonics. This technique is an atmospheric pressure chemical synthesis of materials, in which a precursor solution of chemical compounds in the proper solvent is sprayed and converted into powders or films through a pyrolysis process. The most common ways to generate the aerosol for the spraying process are by pneumatic and ultrasonic systems. The synthesis parameters are usually optimized for the materials optical, structural, electric and mechanical characteristics required. There are several reviews of the research efforts in which spray pyrolysis and the processes involved have been described in detail. This review is intended to focus on research work developed with this technique in relation to high-K dielectric and luminescent materials in the form of coatings and powders as well as multiple layered structures.

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Photoluminescence properties of Eu 3+ -and Tb 3+ -doped YAlO 3 phosphors for white LED applications

Cited by 29 publications

References 20 publications

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

Synthesis and luminescence characterization of Y₂BaZnO₅:RE (RE = Eu³⁺, Tb³⁺, Pr³⁺ and Sm³⁺) phosphors

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

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Photoluminescence properties of Eu 3+ -and Tb 3+ -doped YAlO 3 phosphors for white LED applications

Cited by 29 publications

References 20 publications

Crystallographic, morphological and photoluminescent investigations of Tb3+‐doped YAlO3 perovskites for lighting applications

Crystallographic, morphological and photoluminescent investigations of Tb3+‐doped YAlO3 perovskites for lighting applications

Synthesis and luminescence characterization of Y2BaZnO5:RE (RE = Eu3+, Tb3+, Pr3+ and Sm3+) phosphors

Spray Pyrolysis Technique; High-K Dielectric Films and Luminescent Materials: A Review

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Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

Crystallographic, morphological and photoluminescent investigations of Tb³⁺‐doped YAlO₃ perovskites for lighting applications

Synthesis and luminescence characterization of Y₂BaZnO₅:RE (RE = Eu³⁺, Tb³⁺, Pr³⁺ and Sm³⁺) phosphors