Synthesis and photoluminescence of color tunable red emitting Ba2YAlO5: Eu3+ phosphors

Duan, Huan; Cui, Ruirui; Qi, Xiaosi; Deng, Chaoyong

doi:10.1016/j.molstruc.2019.127551

Cited by 17 publications

(8 citation statements)

References 34 publications

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“…Next, the detailed energy transfer mechanism between Eu 3+ ions in Ca 2 LaHf 2 Al 3 O 12 :Eu 3+ phosphors was investigated in depth. The relationship between log( I / x ) and log( x ) can be expressed using a mathematical equation , herein I refers to the emission intensity, x represents doping concentration, A denotes a constant, and θ = 6, 8, and 10 correspond to dipole–dipole, dipole-quadrupole, and quadrupole–quadrupole interaction, respectively. As shown in Figure e, the slope of the fitting line was −1.845.…”

Section: Resultsmentioning

confidence: 99%

“…Next, the detailed energy transfer mechanism between Eu 3+ ions in Ca 2 LaHf 2 Al 3 O 12 :Eu 3+ phosphors was investigated in depth. The relationship between log(I/x) and log(x) can be expressed using a mathematical equation 56,57 where I is the emission intensity at time t; I 0 refers to the initial emission intensity; A is a constant; and τ represents the decay lifetime. As we all know, the emission intensity ratio of ( 5 D 0 → 7 F 2 )/ ( 5 D 0 → 7 F 1 ) (the so-called R/O ratio) can be used to appraise Eu 3+ site symmetry, 65,66 and the Eu 3+ ion locates at an…”

Section: Morphology and Elementalmentioning

confidence: 99%

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Dazzling Red-Emitting Europium(III) Ion-Doped Ca₂LaHf₂Al₃O₁₂ Garnet-Type Phosphor Materials with Potential Application in Solid-State White Lighting

Devakumar

et al. 2022

Inorg. Chem.

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Bright red-emitting phosphors with high color purity and high photoluminescence quantum yield (PLQY) are highly demanded for the fabrication of high-performance warmwhite light-emitting diodes (LEDs). Herein, we demonstrated a novel efficient Eu 3+ -activated Ca 2 LaHf 2 Al 3 O 12 garnet phosphor with excellent luminescence properties for near-ultraviolet (near-UV) excited warm-white LEDs. The Ca 2 LaHf 2 Al 3 O 12 :Eu 3+ phosphors exhibited an intense excitation spectrum in the near-UV region with a maximum around 394 nm, and they produced dazzling red luminescence peaking at 592, 614, 659, and 711 nm due to the 5 D 0 → 7 F J (J = 1−4) transitions of Eu 3+ ions when the excitation wavelength was set at 394 nm. Luminescent properties have been studied as a function of Eu 3+ doping concentration, and the highest emission intensity was achieved at 50 mol % Eu 3+ , while the dipole−dipole interaction brought the concentration quenching effect. The Ca 2 LaHf 2 Al 3 O 12 :50%Eu 3+ sample exhibited CIE chromaticity coordinates of (0.6419, 0.3575) with a color purity of 92.7%, and its PLQY was measured to be 64%. The thermal stability and activation energy of Ca 2 LaHf 2 Al 3 O 12 :50%Eu 3+ phosphors were also discussed and analyzed. Finally, we made a near-UV chip-based white LED device in which the Ca 2 LaHf 2 Al 3 O 12 :50%Eu 3+ phosphor was utilized as a red ingredient. A bright warm-white light emission was realized from this LED device under 80 mA driving current, accompanied by a high color rendering index (CRI) of 88.3, a low correlation color temperature of 3853 K, and good CIE chromaticity coordinates of (0.3909, 0.3934). These results revealed that these red-emitting Ca 2 LaHf 2 Al 3 O 12 :Eu 3+ phosphors have promising application prospect in near-UV-excited warm-white LEDs with high a CRI.

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Section: Resultsmentioning

confidence: 99%

“…Next, the detailed energy transfer mechanism between Eu 3+ ions in Ca 2 LaHf 2 Al 3 O 12 :Eu 3+ phosphors was investigated in depth. The relationship between log(I/x) and log(x) can be expressed using a mathematical equation 56,57 where I is the emission intensity at time t; I 0 refers to the initial emission intensity; A is a constant; and τ represents the decay lifetime. As we all know, the emission intensity ratio of ( 5 D 0 → 7 F 2 )/ ( 5 D 0 → 7 F 1 ) (the so-called R/O ratio) can be used to appraise Eu 3+ site symmetry, 65,66 and the Eu 3+ ion locates at an…”

Section: Morphology and Elementalmentioning

confidence: 99%

Dazzling Red-Emitting Europium(III) Ion-Doped Ca₂LaHf₂Al₃O₁₂ Garnet-Type Phosphor Materials with Potential Application in Solid-State White Lighting

Devakumar

et al. 2022

Inorg. Chem.

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“…Thus, the bottom of the conduction band moves to a lower energy as the Eu 3+ concentration is increased. 34–36…”

Section: Resultsmentioning

confidence: 99%

“…These consist of a broad band between 225 and 308 nm, which corresponds to a charge transfer (CT) transition from a filled concentration is increased. [34][35][36] The assignments of the Eu 3+ transitions shown in Fig. 6(a) are 532 nm ( 7 F 1 → 5 D 1 ), 524 nm ( 7 F 0 → 5 D 1 ), 463 nm ( 7 F 0 → 5 D 2 ), 412 nm ( 7 F 1 → 5 D 3 ), 403 nm ( 7 F 1 → 5 L 6 ), 393 nm ( 7 F 0 → 5 L 6 ), 380 nm ( 7 F 1 → 5 L 7 ), 360 nm ( 7 F 0 → 5 D 4 ), and 317 nm ( 7 F 0 → 5 H 6 ).…”

Section: Luminescence Propertiesmentioning

confidence: 99%

Luminescence properties of Eu₂O₃-doped ZrO₂–Y₂O₃ single crystals

Zhang

et al. 2022

CrystEngComm

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“…The relationship between log (I/x) and log (x) was explored using the following formula to calculate the energy transfer mechanism between Eu 3+ ions in PBNSEu phosphate glass [39,40] :…”

Section: Radiative Propertiesmentioning

confidence: 99%

Optical, emission, and excitation dynamics of Eu³⁺‐doped bismuth‐based phosphate glass for visible display laser applications

et al. 2022

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Eu3+‐doped‐bismuth‐based phosphate glasses with chemical equation (60 − x)P2O5–20Bi2O3−10Na2CO3–10SrF2–xEu2O3 (PBNSEu), (where x = 0, 0.1, 0.5, 1.0, 1.5 and 2 mol%) were fabricated using the melt‐quenching method. Obtain X‐ray diffraction (XRD), energy‐dispersive X‐ray (EDAX), and Fourier transform infrared (FTIR) spectra were used to characterize the structure of the prepared PBNSEu glass. The J–O (Judd–Ofelt) intensity parameters (Ω2, Ω4) were estimated using photoluminescence emission spectra. When excited with a xenon lamp at λexc = 394 nm, the most intense red‐emission transition occurred at ~612 nm (5D0→7F2). J–O intensity parameters were used to calculate radiative properties, whereas the radiative branching ratio (βR), radiative transition probability (AR), radiative lifetime (τR), and total radiative transition rate (Aτ) were calculated for the transitions 5D0→7FJ (where J = 0–4) and were obtained in the emission spectra for europium ion‐doped in the current glass. Using the CIE1931 chromaticity coordinates axes, the colours of various concentrations of Eu3+ ion‐doped PBNS glass were evaluated using the emission spectra. Temperature‐dependent luminescence spectra were recorded for the optimized PBNSEu20 glass to calculate the activation energy. These results strongly suggested red components in w‐LEDs and visible display laser applications.

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Synthesis and photoluminescence of color tunable red emitting Ba2YAlO5: Eu3+ phosphors

Cited by 17 publications

References 34 publications

Dazzling Red-Emitting Europium(III) Ion-Doped Ca₂LaHf₂Al₃O₁₂ Garnet-Type Phosphor Materials with Potential Application in Solid-State White Lighting

Dazzling Red-Emitting Europium(III) Ion-Doped Ca₂LaHf₂Al₃O₁₂ Garnet-Type Phosphor Materials with Potential Application in Solid-State White Lighting

Luminescence properties of Eu₂O₃-doped ZrO₂–Y₂O₃ single crystals

Optical, emission, and excitation dynamics of Eu³⁺‐doped bismuth‐based phosphate glass for visible display laser applications

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Synthesis and photoluminescence of color tunable red emitting Ba2YAlO5: Eu3+ phosphors

Cited by 17 publications

References 34 publications

Dazzling Red-Emitting Europium(III) Ion-Doped Ca2LaHf2Al3O12 Garnet-Type Phosphor Materials with Potential Application in Solid-State White Lighting

Dazzling Red-Emitting Europium(III) Ion-Doped Ca2LaHf2Al3O12 Garnet-Type Phosphor Materials with Potential Application in Solid-State White Lighting

Luminescence properties of Eu2O3-doped ZrO2–Y2O3 single crystals

Optical, emission, and excitation dynamics of Eu3+‐doped bismuth‐based phosphate glass for visible display laser applications

Contact Info

Product

Resources

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Dazzling Red-Emitting Europium(III) Ion-Doped Ca₂LaHf₂Al₃O₁₂ Garnet-Type Phosphor Materials with Potential Application in Solid-State White Lighting

Dazzling Red-Emitting Europium(III) Ion-Doped Ca₂LaHf₂Al₃O₁₂ Garnet-Type Phosphor Materials with Potential Application in Solid-State White Lighting

Luminescence properties of Eu₂O₃-doped ZrO₂–Y₂O₃ single crystals

Optical, emission, and excitation dynamics of Eu³⁺‐doped bismuth‐based phosphate glass for visible display laser applications