Synthesis and photoluminescence characteristics of Dy incorporated MoO3 phosphor: Suppression concentration quenching

Ayvacıklı, M.; Kaynar, Ümit H.; Karabulut, Y.; Canımoğlu, A.; Bakr, M.; Akça, Sibel; Can, N.

doi:10.1016/j.apradiso.2020.109321

Cited by 11 publications

(5 citation statements)

References 23 publications

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“…The relationship between emission intensity and temperature was investigated to understand the thermal quenching principle of Ca 2 YNbO 6 :0.4Eu 3+[ 35 ] and is expressed using the Arrhenius model:

I_{T} goodbreak= \frac{{normalI}_{0}}{1 + {Ae}^{- △ normalE / K_{B} normalT}}

where among them, the emission intensity at room temperature and the emission intensity at variable temperature are represented by I 0 and I T , K B (Boltzmann constant) and A are both constants, and the activation energy is represented by ΔE. After arranging the equation:

lnA goodbreak- \frac{△ normalE}{K_{B} normalT} goodbreak= \ln ((), \frac{{normalI}_{0}}{{normalI}_{normalt}} goodbreak- 1)

Figure 8(c) displays the linear fitting line (of 1/K B T) and ln(I 0 /I T − 1), and the thermal activation energy △E = 0.246 eV of the Ca 2 YNbO 6 :0.4Eu 3+ phosphor is obtained.…”

Section: Results and Analysismentioning

confidence: 99%

“…Because the high temperature leads to an increased probability of nonradiative transitions between the luminescence centres, the transition between the luminescence centres and the nonradiative transition rate is related to the temperature, and therefore will lead to a decrease in luminescence intensity. [33,34] The relationship between emission intensity and temperature was investigated to understand the thermal quenching principle of Ca 2 YNbO 6 :0.4Eu 3+ [35] and is expressed using the Arrhenius model:…”

Section: Thermal Stabilitymentioning

confidence: 99%

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A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

et al. 2022

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Due to the advantages of good physicochemical properties, thermal stability, and optical properties, double perovskite compounds have received extensive attention. On this basis, a new type of red phosphor, Ca2YNbO6:xEu3+, was synthesized using a high‐temperature solid‐phase method. Its phase purity, morphology, elemental composition, absorption spectrum, photoluminescence, thermal stability, and Commission Internationale de l'éclairage (CIE) chromaticity coordinates were thoroughly investigated. The results display that there is no impurity phase in the samples and the convergence factor Rwp = 14.2%; the microscopic particles are uniform and full, and the distribution of each element is uniform. The energy band gap ΔE is between 3.71 eV and 3.65 eV. The luminescence intensity is the best when the doped Eu3+ concentration x reaches 0.4, and emits 612 nm red light (5D0→7F2) under 465 nm excitation, and the concentration quenching is attributed to a d–d interaction. The luminescence intensity at 425 K was still 75% of the room temperature luminescence intensity, which indicates that the thermal stability is extremely superior. The CIE chromaticity coordinates (0.6534, 0.3455) of the Ca2YNbO6:0.4Eu3+ phosphors are very close to National Television Standards Committee (0.670, 0.330), and the samples have low correlated colour temperature (2656 K) and high colour purity (99.90%). All findings suggest that Ca2YNbO6:Eu3+ can serve as a substitute for red phosphor in WLEDs.

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I_{T} goodbreak= \frac{{normalI}_{0}}{1 + {Ae}^{- △ normalE / K_{B} normalT}}

lnA goodbreak- \frac{△ normalE}{K_{B} normalT} goodbreak= \ln ((), \frac{{normalI}_{0}}{{normalI}_{normalt}} goodbreak- 1)

Figure 8(c) displays the linear fitting line (of 1/K B T) and ln(I 0 /I T − 1), and the thermal activation energy △E = 0.246 eV of the Ca 2 YNbO 6 :0.4Eu 3+ phosphor is obtained.…”

Section: Results and Analysismentioning

confidence: 99%

Section: Thermal Stabilitymentioning

confidence: 99%

A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

et al. 2022

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“…For luminescence thermal quenching, activation energy ΔE can be calculated by the following Arrhenius equation, 43 CIE chromaticity coordinate.-The CIE-1931 coordinates is usually used to describe the color of phosphors. The CIE chromaticity coordinate diagram of Ca 2 GdNbO 6 : 0.5Eu 3+ is shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

A Novel Red-Emitting Phosphor Ca₂GdNbO₆: Eu³⁺: Influences of Sintering Temperature and Eu³⁺ Concentration on the Photoluminescence

Zhang

Cui

Zhang

et al. 2021

ECS J. Solid State Sci. Technol.

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A series of novel double perovskite Ca2GdNbO6: Eu3+ red-emitting phosphors have been synthesized by the conventional solid-state reaction route at various Eu3+ ion concentrations and sintering temperature. The crystal structure of phosphors was determined by an X-ray powder diffraction pattern, and the micromorphology was described by scanning electron microscope. The optical properties were analyzed through absorption spectra, photoluminescence spectra, decay curve, CIE chromaticity coordinate, and thermal stability. The synthesized Ca2GdNbO6: Eu3+ phosphors emit red light (614 nm) under 416 nm excitation. The emission intensity of the sample reaches the maximum when the Eu3+ ion concentration is of 0.5. The CIE chromaticity coordinate of Ca2GdNbO6: 0.5Eu3+ phosphor is (0.652, 0.347), located in the red region. The investigation results indicated that the Ca2GdNbO6: Eu3+ phosphors have potential application in white light-emitting diodes.

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Section: Characteristics Of [Sm 3+ ]/[Dy 3+ ] Co-doped Srwomentioning

confidence: 99%

“…As shown in Figure 7c, the energy transfer efficiency tended to increase as the amount of Sm 3+ ions added increased. However, as the emission intensity decreased, a concentration-quenching phenomenon due to excessive rare earth doping was observed [22]. The electrons located at the ground state, 6 H15/2, of the Dy 3+ ions absorbed energy under a 253 nm excitation energy and later jumped to the excited state.…”

Section: Characteristics Of [Sm 3+ ]/[Dy 3+ ] Co-doped Srwomentioning

confidence: 99%

Synthesis of Rare-Earth-Doped Strontium Tungstate Phosphor at Room Temperature and Applied Flexible Composite

Jung

Park

2022

Materials

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In this study, we successfully synthesized rare-earth-doped crystalline SrWO4 at room temperature by co-precipitation. The results from the X-ray diffraction analysis showed a main diffraction peak related to the (112) plane. Phosphors doped with either Dy3+ or Sm3+ ions showed strong light absorption in the UV region and blue-yellow and red light emission. To synthesize a white light phosphor, Dy3+ and Sm3+ ions were co-doped to produce a SrWO4:[Sm3+]/[Dy3+] phosphor. When the Sm3+ ion concentration was increased and the Dy3+ concentration was maintained, the red light intensity increased while the blue-yellow light intensity decreased. The composites were combined with polydimethylsiloxane (PDMS), and a flexible composite material was fabricated. The composite exhibited various luminescence properties under UV and visible light, which suggested its potential for use as an LED color filter.

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Synthesis and photoluminescence characteristics of Dy incorporated MoO3 phosphor: Suppression concentration quenching

Cited by 11 publications

References 23 publications

A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

A Novel Red-Emitting Phosphor Ca₂GdNbO₆: Eu³⁺: Influences of Sintering Temperature and Eu³⁺ Concentration on the Photoluminescence

Synthesis of Rare-Earth-Doped Strontium Tungstate Phosphor at Room Temperature and Applied Flexible Composite

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Synthesis and photoluminescence characteristics of Dy incorporated MoO3 phosphor: Suppression concentration quenching

Cited by 11 publications

References 23 publications

A novel red phosphor Ca2YNbO6:Eu3+ for WLEDs

A novel red phosphor Ca2YNbO6:Eu3+ for WLEDs

A Novel Red-Emitting Phosphor Ca2GdNbO6: Eu3+: Influences of Sintering Temperature and Eu3+ Concentration on the Photoluminescence

Synthesis of Rare-Earth-Doped Strontium Tungstate Phosphor at Room Temperature and Applied Flexible Composite

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A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

A Novel Red-Emitting Phosphor Ca₂GdNbO₆: Eu³⁺: Influences of Sintering Temperature and Eu³⁺ Concentration on the Photoluminescence