A novel orange-red emitting borate based phosphor for NUV pumped LEDs

Li, Jiangong; Yan, Huifang; Yan, Fengmei

doi:10.1016/j.ijleo.2016.04.022

Cited by 18 publications

(4 citation statements)

References 25 publications

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“…It is reported that there are three main types of the multipolar interactions: dipole‐dipole, dipole‐quadrupole, quadrupole‐quadrupole interactions [42,46] . Based on the Dexter theory, the crucial part of multipolar interaction could be determined by this equation: [47–51]

true \frac{1}{x} = K [1 + β {(x)}_{3}^{0}]

…”

Section: Resultsmentioning

confidence: 99%

Orange‐Red‐emitting Ca₉Gd(PO₄)₇:Eu³⁺ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED

et al. 2021

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Orange‐red‐emitting Eu3+‐doped Ca9Gd(PO4)7 phosphors have been obtained by a sol‐gel technique. These phosphors, excited by UV (270 nm) and near UV light (394 nm), emit orange‐red light in the range of 580–710 nm. The Ca9Gd(PO4)7:7 mol% Eu3+ phosphor annealed at 1100 °C shows the highest PL intensity. Judd‐Ofelt analysis reveals that the neighbor surroundings of Eu3+ ions are asymmetric, and the lowest asymmetry value is found at the dopant ratio of 7 mol%. The optimal phosphor excited by the wavelength of 394 nm displays an excellent thermal stability (∼76.4 % at 160 °C) with an activation energy of 0.163 eV. The corresponding CIE chromaticity coordinates (x; y) and color purity are calculated to be (0.5849; 0.3635) and 84.6 %, respectively. The quantum efficiency values of the Ca9Gd(PO4)7:Eu3+ phosphors coated on UV and near‐UV chips are 87.4 % and 5.1 %, respectively. It is the first time that the QE values of Ca9Gd(PO4)7:Eu3+‐based red and blue‐emitting LEDs are reported.

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true \frac{1}{x} = K [1 + β {(x)}_{3}^{0}]

…”

Section: Resultsmentioning

confidence: 99%

Orange‐Red‐emitting Ca₉Gd(PO₄)₇:Eu³⁺ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED

et al. 2021

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“…In addition, there are three main types of the multipolar interactions: dipole-dipole, dipole-quadrupole, quadrupolequadrupole interactions [34,37]. According to Dexter theory [10,13,14,38,39], the correlation between the emission intensity and the quenching Cr 3+ ions level could be this reduced equation [34]:…”

Section: Resultsmentioning

confidence: 99%

Photoluminescent Properties of Red-emitting AlPO4:Cr3+ Phosphor for Plant Growth LEDs

Manh Trung,

Tu,

Quang

et al. 2021

MaP

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In this study, red-emitting AlPO4:Cr3+ phosphors have been successfully synthesized by a facile sol-gel method. The Tanabe–Sugano diagram demonstrates that the surrounding sites of Cr3+ ions has a high crystal field with Dq/B=2.47. The sharp 694-nm peak on the PL of AlPO4:Cr3+ phosphor could be attributed to the 2E→4A2 electron transition of Cr3+ ions. The AlPO4:0.3%Cr3+ phosphor presents the highest PL intensity, then a purple LED prototype is obtained by coating the optimum powder on a UV LED chip. The color coordinates (0.2412, 0.1330) of the purple LED prototype implies that AlPO4:Cr3+ phosphors are promosing to be used as deep red phosphor powder for horticulture LED lighting.

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“…studied the luminescence properties of CaBi 1.95 B 2 O 7 :0.05Sm 3+. The overlapping of the charge transfer (CT) band O 2− →Sm 3+ resulted in the occurrence of broadband at 230–300 nm . The PL spectrum (Figure ) showed three orange–red‐emission bands peaking at 560, 605 and 649 nm and can be attributed to typical f–f transitions of Sm 3+ ( 4 G 5/2 → 6 H J (J = 5/2, 7/2, 9/2)).…”

Section: Development Of New Phosphorsmentioning

confidence: 96%

Tunable lanthanide/transition metal ion‐doped novel phosphors for possible application in w‐LEDs: a review

Tiwari

Dhoble

2019

Luminescence

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Lanthanide-based phosphors have been extensively investigated for their possible applications in solid-state lighting technologies especially for white-light-emitting diodes. In this review article emphasis has been laid on discussing the recent developments of phosphors for warm white-light production based on various optical characteristics such as quantum efficiency, thermal stability, short emission decay time, long-term stability, facile synthesis, and low cost of production. We have tried to cover the essential and latest discoveries of the lanthanide/rare earth-doped phosphors after 2010. New generations of narrow-band phosphors have also been included. The optical and material properties of several novel phosphors and their luminescence characteristics have been thoroughly discussed.

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A novel orange-red emitting borate based phosphor for NUV pumped LEDs

Cited by 18 publications

References 25 publications

Orange‐Red‐emitting Ca₉Gd(PO₄)₇:Eu³⁺ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED

Orange‐Red‐emitting Ca₉Gd(PO₄)₇:Eu³⁺ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED

Photoluminescent Properties of Red-emitting AlPO4:Cr3+ Phosphor for Plant Growth LEDs

Tunable lanthanide/transition metal ion‐doped novel phosphors for possible application in w‐LEDs: a review

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A novel orange-red emitting borate based phosphor for NUV pumped LEDs

Cited by 18 publications

References 25 publications

Orange‐Red‐emitting Ca9Gd(PO4)7:Eu3+ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED

Orange‐Red‐emitting Ca9Gd(PO4)7:Eu3+ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED

Photoluminescent Properties of Red-emitting AlPO4:Cr3+ Phosphor for Plant Growth LEDs

Tunable lanthanide/transition metal ion‐doped novel phosphors for possible application in w‐LEDs: a review

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Orange‐Red‐emitting Ca₉Gd(PO₄)₇:Eu³⁺ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED

Orange‐Red‐emitting Ca₉Gd(PO₄)₇:Eu³⁺ Phosphors: Judd‐Ofelt Analysis and Investigation on the Thermal Stability, Quantum Efficiency for WLED