Crystal chemistry and photoluminescent investigation of novel white light emanating Dy3+ doped Ca9Bi(VO4)7 nanophosphor for ultraviolet based white LEDs

Phogat, Priya; Khatkar, S.P.; Malik, R.K.; Sushma, .; Dalal, Jyoti; Hooda, Pooja; Taxak, V.B.

doi:10.1016/j.matchemphys.2021.124828

Cited by 38 publications

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“…10 Dy 3+ ions at a higher symmetry site result in a stronger blue emission band and at low symmetry, the site leads to a stronger yellow emission band in the emission spectrum. 11 A number of Dy 3+ doped luminescence materials have been reported, for instance, SrYAl 3 O 7 :Dy 3+ , 12 Ca 9 Bi(VO 4 ) 7 :Dy 3+ , 13 Na 5 Y(MoO 4 ) 4 :Dy 3+ , 14 Ca 2 Sb 2 O 7 :Dy 3+ , 15 and NaPbB 5 O 9 :Dy 3+ . 16 Eu 3+ ion exhibits orange and pure red emissions because of the transitions from the excited state 5 D 0 to the ground states 7 F J ( J = 0, 1, 2, 3, 4, and 5) in the 4f 6 electron configuration.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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CaAl₂Si₂O₈:Dy³⁺, Eu³⁺: synthesis, luminescence properties, energy transfer, and tunable emission

et al. 2023

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

CaAl₂Si₂O₈:Dy³⁺, Eu³⁺: synthesis, luminescence properties, energy transfer, and tunable emission

et al. 2023

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“…To mitigate this issue, artificial light production was one such area where scientists have demonstrated a keen interest in exploring the materials and methods for designing and developing lower power consumption devices 3 , 4 . Rare-earth (RE) ions doped nanophosphors (NPs) were crucial candidates that have been extensively utilized in solid-state lighting, efficient displays with high brightness, excellent luminescence efficiency, and superior energy-saving competencies, owing to their good thermal and chemical stability 5 – 8 . Generally, partially filled 4f.…”

Section: Introductionmentioning

confidence: 99%

One material, many possibilities via enrichment of luminescence in La2Zr2O7:Tb3+ nanophosphors for forensic stimuli aided applications

Lavanya

Darshan

Malleshappa

et al. 2022

Sci Rep

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Engineering a single material with multidirectional applications is crucial for improving productivity, low cost, flexibility, least power consumption, etc. To achieve these requirements, novel design structures and high-performance materials are in urgent need. Lanthanide-doped nanophosphors have the greatest strengths and ability in order to tune their applications in various dimensions. However, applications of nanophosphor in latent fingerprints visualization, anti-counterfeiting, and luminescent gels/films are still in their infancy. This study demonstrated a simple strategy to enhance the luminescence of Tb3+ (1–11 mol %) doped La2Zr2O7 nanophosphors by conjugating various fluxes via a simple solution combustion route. The photoluminescence emission spectra reveal intense peaks at ~ 491, 546, 587, and 622 nm, which arises from 5D4 → 7FJ (J = 6, 5, 4, 3) transitions of Tb3+ ions, respectively. The highest emission intensity was achieved in the NH4Cl flux assisted nanophosphor as compared to NaBr and NH4F assisted samples. The colorimetric images of fingerprints visualized using the optimized nanophosphor on forensic related surfaces exhibit level –III ridge details, including sweat pores, the width of the ridges, bifurcation angle, and the successive distance between sweat pores, etc. These results are decisive parameters that clearly support the statement “no two persons have ever been found to have the same fingerprints”. The anti-counterfeiting security ink was formulated using optimized nanophosphor and various patterns were designed by simple screen printing and dip pen technologies. The encoded information was decrypted only under ultraviolet 254 nm light. All the designed patterns are exhibit not just what it looks/feel like and how better it works. As a synergetic contribution of enhanced luminescence of the prepared nanophosphor, the green-emissive films were fabricated, which display excellent flexibility, uniformity, and transparency in the normal and ultraviolet 254 nm light illumination. The aforementioned results revealed that the prepared NH4Cl flux-assisted La2Zr2O7: Tb3+(7 mol %) NPs are considered to be the best candidate for multi-dimensional applications.

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Luminescence study of Dy³⁺ doped magnesium aluminate phosphors for white light

Kaur

Rani

2023

Zeitschrift anorg allge chemie

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Pure MgAl2O4 and a series of Dysprosium (Dy3+) doping in MgAl2O4 nanoparticles has synthesized using wet chemical sol‐gel method and prepared samples were sintered at 1100 °C. X‐ray diffraction analysis confirms the cubic phase of MgAl2O4 spinel without any impurity in phase even with different doping concentrations of Dy3+ (0.2–1.8 mol %). Under ultraviolet irradiation (283 nm) the fluorescence spectrum of pure MgAl2O4 shows maximum emission in the green‐yellow region. On Dy3+ doping in MgAl2O4, broad emission spectra have been observed due to energy transition that takes place between the host and dopant. To explore the nanophosphor for white light, chromaticity coordinates (CIE), color temperature (CCT), color rendering index (CRI) and color purity were analyzed and at 1.4 mol % doping concentration of Dy3+ in MgAl2O4 got best results i. e. CIE co‐ordinates (0.3326, 0.3334), CCT (5487), CRI (95) and minimum value of color purity (0.20 %). It is observed that emission shifts from yellow‐green to nearly white light emission as the doping is incorporated into the host. It is found that the prepared nanophosphors are energy efficient white light material.

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Crystal chemistry and photoluminescent investigation of novel white light emanating Dy3+ doped Ca9Bi(VO4)7 nanophosphor for ultraviolet based white LEDs

Cited by 38 publications

References 43 publications

CaAl₂Si₂O₈:Dy³⁺, Eu³⁺: synthesis, luminescence properties, energy transfer, and tunable emission

CaAl₂Si₂O₈:Dy³⁺, Eu³⁺: synthesis, luminescence properties, energy transfer, and tunable emission

One material, many possibilities via enrichment of luminescence in La2Zr2O7:Tb3+ nanophosphors for forensic stimuli aided applications

Luminescence study of Dy³⁺ doped magnesium aluminate phosphors for white light

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Crystal chemistry and photoluminescent investigation of novel white light emanating Dy3+ doped Ca9Bi(VO4)7 nanophosphor for ultraviolet based white LEDs

Cited by 38 publications

References 43 publications

CaAl2Si2O8:Dy3+, Eu3+: synthesis, luminescence properties, energy transfer, and tunable emission

CaAl2Si2O8:Dy3+, Eu3+: synthesis, luminescence properties, energy transfer, and tunable emission

One material, many possibilities via enrichment of luminescence in La2Zr2O7:Tb3+ nanophosphors for forensic stimuli aided applications

Luminescence study of Dy3+ doped magnesium aluminate phosphors for white light

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CaAl₂Si₂O₈:Dy³⁺, Eu³⁺: synthesis, luminescence properties, energy transfer, and tunable emission

CaAl₂Si₂O₈:Dy³⁺, Eu³⁺: synthesis, luminescence properties, energy transfer, and tunable emission

Luminescence study of Dy³⁺ doped magnesium aluminate phosphors for white light