Optical properties of Eu3+ activated SrLa2O4 red-emitting phosphors for WLED applications

Perumal, Rajesh Narayana; Subalakshmi, G.; Varadarajan, E.; Sadhasivam, S.; Vinitha, G.

doi:10.1007/s10854-017-8189-3

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…The broad PLE band peaking at ~ 390 nm within the range 340-500 nm is assigned to the 3 P 1 → 1 S 0 transition of Bi 3+ ion [30]. Four narrow PL bands are attributed to the 5 D 0 → ( 7 F 1 , 7 F 2 , 7 F 3 , and 7 F 4 ) transitions of Eu 3+ ion [31] [32]. Many narrow PLE bands in the range of 360-550 nm are attributed to the f-f transitions of Eu 3+ ion [33].…”

Section: Luminescence Propertiesmentioning

confidence: 94%

Synthesis, energy transfer, charge compensation and luminescence properties of CaZrO3:Eu3+, Bi3+, Li+ phosphor

Cao

Xiao

Zhang

et al. 2018

J Mater Sci: Mater Electron

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phosphors are synthesized by high-temperature solid-state reaction method in air. Their luminescence properties are researched, compared, and analyzed. CaZrO 3 :Bi 3+ phosphor under excitation at 310 nm emits deep-blue light with chromaticity coordinate (0.1612, 0.0254). CaZrO 3 :Eu 3+ phosphor under excitation at 310 and 395 nm shows red-emitting with chromaticity coordinate (0.6386, 0.3611). CaZrO 3 :Eu 3+ , Bi 3+ phosphor under excitation at 310 nm exhibits a systematically varied hue from deep-blue to red light by changing Eu 3+ ion concentration, and that with excitation at 395 nm only emits red light with chromaticity coordinate (0.6386, 0.3611). The energy transfer process from Bi 3+ to Eu 3+ ions may be indicated by their spectral properties. The optimal Eu 3+ and Bi 3+ ions concentrations are 5 mol% and 0.9 mol%, respectively. The emission intensity CaZrO 3 :Eu 3+ , Bi 3+ phosphor may be enhanced about 1.6 times due to the co-doping Li + ion as charge compensator role. The luminous mechanism of CaZrO 3 :Eu 3+ , Bi 3+ phosphor is explained by the simplified energy level diagrams of Bi 3+ and Eu 3+ ions.

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Section: Luminescence Propertiesmentioning

confidence: 94%

Synthesis, energy transfer, charge compensation and luminescence properties of CaZrO3:Eu3+, Bi3+, Li+ phosphor

Cao

Xiao

Zhang

et al. 2018

J Mater Sci: Mater Electron

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“…However, CaO suffers from efficiency in deep red emission at 620–630 nm. However, SrLa 2 O 4 upon doping with Eu 3+ emits broad deep red emissions when excited with near UV wavelengths [15]. To solve these problems, the most recent method was to use UV‐LEDs with triple‐wavelength‐producing RGB (red, green, blue) phosphors [16].…”

Section: Introductionmentioning

confidence: 99%

Studies on a novel SrZr₂CaLa₂O₈:Eu³⁺ phosphor for lighting applications emitting direct white light

Aitha,

Dinakar,

Murthy

et al. 2023

Luminescence

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Direct white light emitting phosphors play a significant role in the display industry due to their ability to improve the quality, efficiency, and versatility of lighting sources used in most of the displays. The currently investigated phosphor SrZr2CaLa2O8:Eu3+ was prepared by a conventional solid‐state reaction method. It has been observed that the stoichiometric ratio of all precursors plays an important role in determining the characteristics of the final phosphor. From X‐ray diffraction (XRD) analysis, the phosphor was observed to have a hexagonal phase and a crystal size of ~28 nm. Scanning electron microscopy (SEM) observations revealed a cluster of rod‐like structures with an average diameter of ~0.2 μm. The excitation peak maximum observed at 280 nm is due to charge transfer between Eu3+‐O2− ions. The energy transitions 7F0 → 5L6 and 7F0 → 5D2 are responsible for the appearance of other excitation peaks at ultraviolet (UV) (395 nm), blue (~467 nm), green (~540 nm), orange (~590 nm), and red (~627 nm) attributed to 5D0 → 7FJ (J = 0–4) transitions of europium ion (Eu3+). The Commercial International de I'Eclairage (CIE) chromaticity coordinates were estimated to be (0.37, 0.0.33) and (0.67, 0.33) for the emissions corresponding to 395 and 590 nm, respectively. The characteristic emissions of Eu3+ ions allow this novel phosphor to be used to generate direct white light in light‐emitting diodes (LEDs), which is otherwise difficult to achieve in single‐component systems.

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Investigations On Structural & Luminescence Characteristics Of Sm3+Stimulated Bi2La4O9 Binary System For LEDs

Subalakshmi,

Perumal,

Vijayalakshmi

et al. 2024

J Opt

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Optical properties of Eu3+ activated SrLa2O4 red-emitting phosphors for WLED applications

Cited by 4 publications

References 27 publications

Synthesis, energy transfer, charge compensation and luminescence properties of CaZrO3:Eu3+, Bi3+, Li+ phosphor

Synthesis, energy transfer, charge compensation and luminescence properties of CaZrO3:Eu3+, Bi3+, Li+ phosphor

Studies on a novel SrZr₂CaLa₂O₈:Eu³⁺ phosphor for lighting applications emitting direct white light

Investigations On Structural & Luminescence Characteristics Of Sm3+Stimulated Bi2La4O9 Binary System For LEDs

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Optical properties of Eu3+ activated SrLa2O4 red-emitting phosphors for WLED applications

Cited by 4 publications

References 27 publications

Synthesis, energy transfer, charge compensation and luminescence properties of CaZrO3:Eu3+, Bi3+, Li+ phosphor

Synthesis, energy transfer, charge compensation and luminescence properties of CaZrO3:Eu3+, Bi3+, Li+ phosphor

Studies on a novel SrZr2CaLa2O8:Eu3+ phosphor for lighting applications emitting direct white light

Investigations On Structural & Luminescence Characteristics Of Sm3+Stimulated Bi2La4O9 Binary System For LEDs

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Studies on a novel SrZr₂CaLa₂O₈:Eu³⁺ phosphor for lighting applications emitting direct white light