Synthesis optimization, photoluminescence and thermoluminescence studies of Eu3+ doped calcium aluminozincate phosphor

Kaur, Sumandeep; Rao, A.S.; Jayasimhadri, M.; Bathula, Sivaiah; Haranath, D.

doi:10.1016/j.jallcom.2019.06.169

Cited by 33 publications

(4 citation statements)

References 48 publications

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“…In addition, XRDP was employed to gain insights into the average particle size, which was computed using Scherrer's formula (Equation 2) [30]:

D=\frac{0.9\lambda }{\beta cos\theta}

…”

Section: Resultsmentioning

confidence: 99%

Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Ayoub,

Kumar

2024

Luminescence

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In this work, we present the synthesis of a green‐emitting series of BaGd2ZnO5:xHo3+ (0.5–3 mol%) phosphors using a high‐temperature solid‐state reaction method. Phase purity and crystal structure information were evaluated through X‐ray powder diffraction patterns. Optical properties were examined through diffuse reflectance spectra, revealing that the prepared phosphor exhibited a band gap of 4.65 eV. The effect of Ho3+ doping on the morphology and ion distribution on the surface was assessed using scanning electron microscopy and time‐of‐flight secondary ion mass spectrometry techniques, respectively. The excitation spectra of the synthesized phosphor exhibited a charge transfer band and strong absorption transitions. The emission spectra displayed typical holmium emission characteristics, featuring a strong green emission band associated with f–f transitions from 5F4 + 2S2 → 5I8. Decay dynamics of the synthesized phosphor exhibited a single‐exponential decay pattern, with lifetimes ranging from 0.103 to 0.053 ms. The intrinsic radiative lifetime, calculated through Auzel's fitting was determined to be 0.14 ms. Using the emission spectra, colorimetric behaviour was analyzed, revealing that the Commission Internationale de l'éclairage (CIE) coordinates exclusively lay within the green region at (0.285, 0.705), with an impressive colour purity of 99.6%. Given these marked properties, the synthesized phosphor exhibits great potential for a wide range of green‐emitting applications, including displays, white light‐emitting diodes, and security signage.

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“…In addition, XRDP was employed to gain insights into the average particle size, which was computed using Scherrer's formula (Equation 2) [30]:

D=\frac{0.9\lambda }{\beta cos\theta}

…”

Section: Resultsmentioning

confidence: 99%

Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Ayoub,

Kumar

2024

Luminescence

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“…The average crystallite size of Ca 2.97 Al 4 ZnO 10 :0.03Cr 3+ was measured by substituting the related parameters from the recorded XRD data in the Debye–Scherer equation, as reported in the literature. 23 The average crystallite size is estimated as 38 nm.…”

Section: Resultsmentioning

confidence: 99%

Deep red emission from rare-earth-free calcium aluminozincate phosphor with the substitution of Cr³⁺ ion

2023

Self Cite

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“…As we know, concentration quenching (CQ) of the RE-activated phosphors could be charged by an electric multipolar or exchange interaction in general. Fortunately, it could be identified by the following expressions: ,− In eq , the critical distance ( R c ) is used to distinguish exchange or electric multipolar interaction. When R c > 5 Å, the electric multipolar interaction would prevail in the CQ mechanism.…”

Section: Resultsmentioning

confidence: 99%

Strong Green Emission of Erbium(III)-Activated La₂MgTiO₆ Phosphors for Solid-State Lighting and Optical Temperature Sensors

Hua

2021

ACS Sustainable Chem. Eng.

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In this work, novel green-emitting La 2 MgTiO 6 :Er 3+ (LMTO:Er 3+ ) phosphors were successfully synthesized. The phase structure, electronic structure, morphology, luminescence behaviors, and other optical characteristics were investigated in detail. Besides, the optical sensing properties of the thermal-coupled levels ( 2 H 11/2 , 4 S 3/2 ) were investigated based on the fluorescence intensity ratio principle, and the maximum absolute and relative sensing sensitivities were found to be as high as 0.963% and 1.107% K −1 , respectively. The packaged light-emitting diode (LED) emitted the near-white light with a color-rendering index of 77.12 and a proper correlated color temperature of 4989 K, respectively. Finally, the novel polydimethylsiloxane film-converted LED structure was fabricated. All the above results suggest that the novel LMTO:Er 3+ phosphors are proposed for solid-state lighting and luminescent thermometers.

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Synthesis optimization, photoluminescence and thermoluminescence studies of Eu3+ doped calcium aluminozincate phosphor

Cited by 33 publications

References 48 publications

Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Deep red emission from rare-earth-free calcium aluminozincate phosphor with the substitution of Cr³⁺ ion

Strong Green Emission of Erbium(III)-Activated La₂MgTiO₆ Phosphors for Solid-State Lighting and Optical Temperature Sensors

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Synthesis optimization, photoluminescence and thermoluminescence studies of Eu3+ doped calcium aluminozincate phosphor

Cited by 33 publications

References 48 publications

Ho3+‐doped BaGd2ZnO5 green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Ho3+‐doped BaGd2ZnO5 green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Deep red emission from rare-earth-free calcium aluminozincate phosphor with the substitution of Cr3+ ion

Strong Green Emission of Erbium(III)-Activated La2MgTiO6 Phosphors for Solid-State Lighting and Optical Temperature Sensors

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Product

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Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Ho³⁺‐doped BaGd₂ZnO₅ green‐emitting phosphor for solid‐state lighting: synthesis, characterization, and photoluminescence properties

Deep red emission from rare-earth-free calcium aluminozincate phosphor with the substitution of Cr³⁺ ion

Strong Green Emission of Erbium(III)-Activated La₂MgTiO₆ Phosphors for Solid-State Lighting and Optical Temperature Sensors