Multicolour emission from thermally stable Tb3+/Eu3+ co-doped CaLa4Si3O13 phosphors for single-component w-LEDs application

Shen, Bingqing; Wu, Fei; Zhang, Yuanpeng; Xia, Haiping; Chen, Baojiu; Hu, Jianxu

doi:10.1016/j.jallcom.2019.151836

Cited by 41 publications

(2 citation statements)

References 58 publications

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“…With the enhancing of people's awareness for protecting the environment, the studying of phosphor-converted white light emitting diodes (pc-WLEDs) had attracted much attention due to the eminent advantages in high luminescent efficiency, low energy consumption, superior lifetime and excellent reliability. The pc-WLEDs as eco-benign products have become the most potential light source in the next generation [1][2][3][4][5][6][7][8][9][10]. Moreover, trivalent rare-earth ions (RE 3+ )-doped aluminate phosphors are appropriate for light-conversion materials owing to their excellent luminescent efficiency, high chemical and thermal stability [5,7,8,[11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

Zhou

Jiang

Chen

et al. 2022

Journal of Luminescence

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The color-tunable GdCaAl3O7: RE 3+ (RE=Eu, Tb, Eu@Tb) phosphors were synthesized via an ultrafast sol-gel auto-combustion synthesis method. The XRD (X-ray diffraction) patterns confirmed the forming of GdCaAl3O7 tetragonal phase, and the SEM (Scanning electron microscopy) images indicated that the obtained products presented honeycomb-like structure due to the gas releasing during the auto-combustion process. The EDS (Energy dispersion spectra) results suggest that Eu 3+ and Tb 3+ were well incorporated into the host matrices of GdCaAl3O7. The luminescent properties, concentration quenching mechanism, energy transfer mechanism, luminescent dynamics, thermal stability and product practicability of GdCaAl3O7: R 3+ (RE=Eu, Tb, Eu@Tb) phosphors were investigated systematically. All the GdCaAl3O7: RE 3+ (RE=Eu, Tb, Eu@Tb) products presented the characteristic emission of doped RE 3+ . Using GdCaAl3O7: 50% Tb 3+ @3.0% Eu 3+ as yellow-emitting phosphors in combination with commercial BAM: Eu 2+ blue-emitting phosphors and a NUV chip can successfully package a warm white LED device with high color rendering index (CRI, 86.3) and low correlated color temperature (CCT, 3348 K) that was very suitable for near-ultraviolet light-triggered indoor illumination.

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Section: Introductionmentioning

confidence: 99%

Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

Zhou

Jiang

Chen

et al. 2022

Journal of Luminescence

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“…As a new environment-friendly lighting source, white-lightemitting-diode (WLED) has attracted widespread attention [1][2][3][4][5][6][7]. At present, the leading commercial WLED technology combines blue chips with yellow phosphor through epoxy resin or silica gel, but the lack of red-light component in yellow phosphor results in low color rendering index (CRI) [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Fluorescence regulation derived from Eu³⁺ in miscible-order fluoride-phosphate blocky phosphor

Xiong¹,

Li²,

Zhang³

et al. 2021

Nanotechnology

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Miscible-order fluoride-phosphate blocky phosphor (FBP), composed with ordered-phase of NaYF4 crystals and unordered phase of tin-fluorophosphate glass, is prepared by a two-step process and luminescent properties of FBPs embedded with different particle sizes of NaYF4 crystals are presented. High-frequency fluorescence from higher metastable 5D J (J = 1, 2 and 3) energy levels are effectively released in Eu3+ doped fluoride crystals. Taking the blue emission of Sn2+ as the framework, multi-peak emissions from metastable energy levels are controlled to adjust the color coordinates of the FBP to the white-light region, which the color rendering index (CRI) reaches 89. Tunable color FBP with high CRI retains splendid luminescence property of fluoride, providing a potential candidate for the development of white LED.

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Luminescence properties and energy transfer of Eu³⁺/Tb³⁺ co‐doped glass ceramics containing Na₃Gd(PO₄)₂

Chen

Jia

Zou

et al. 2020

J Chinese Chemical Soc

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Tb 3+ -doped and Eu 3+ /Tb 3+ co-doped transparent glass ceramics containing Na 3 Gd(PO 4 ) 2 crystal phase were prepared by melt crystallization. The types of crystals, grain size, and optical transmittance of the samples were investigated by X-ray diffraction (XRD), scanning electron microscope (SEM), and UV visible absorption spectrometer. The effect of different heat treatment time on grain size, crystal morphology, and light transmittance was also studied. The luminescence performance of transparent glass ceramics was systematically studied by the excitation spectrum, emission spectrum, and the fluorescence lifetime. The optimal doping concentration of Tb 3+ doped and Eu 3+ /Tb 3+ codoped were determined. When the mole percent concentration of Tb 4 O 7 was 0.4%, the strongest green light was obtained at 546 nm ( 5 D 4 ! 7 F 5 ). Meanwhile, the energy transfer process between Eu 3+ and Tb 3+ was discussed.Under the excitation of 374 nm, white light can be obtained by adjusting the concentration ratio of Eu 3+ and Tb 3+ . K E Y W O R D Senergy transfer, Eu 3+ /Tb 3+ co-doped, glass ceramics, Na 3 Gd (PO 4 ) 2

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Multicolour emission from thermally stable Tb3+/Eu3+ co-doped CaLa4Si3O13 phosphors for single-component w-LEDs application

Cited by 41 publications

References 58 publications

Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

Fluorescence regulation derived from Eu³⁺ in miscible-order fluoride-phosphate blocky phosphor

Luminescence properties and energy transfer of Eu³⁺/Tb³⁺ co‐doped glass ceramics containing Na₃Gd(PO₄)₂

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Multicolour emission from thermally stable Tb3+/Eu3+ co-doped CaLa4Si3O13 phosphors for single-component w-LEDs application

Cited by 41 publications

References 58 publications

Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

Sol-gel auto-combustion synthesis and luminescence properties of GdCaAl3O7: RE3+ (RE=Eu, Tb, Eu@Tb) phosphors for near-ultraviolet light-triggered indoor illumination

Fluorescence regulation derived from Eu3+ in miscible-order fluoride-phosphate blocky phosphor

Luminescence properties and energy transfer of Eu3+/Tb3+ co‐doped glass ceramics containing Na3Gd(PO4)2

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Product

Resources

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Fluorescence regulation derived from Eu³⁺ in miscible-order fluoride-phosphate blocky phosphor

Luminescence properties and energy transfer of Eu³⁺/Tb³⁺ co‐doped glass ceramics containing Na₃Gd(PO₄)₂