Synthesis design of Y3Al5O12: Ce3+ phosphor for fabrication of ceramic converter in automotive application

Kwon, Seok Bin; Choi, Seung Hee; Yoo, Jung Hyeon; Jeong, Seong Guk; Song, Young Hoon; Yoon, Dae Ho

doi:10.1016/j.optmat.2018.04.037

Cited by 12 publications

(1 citation statement)

References 15 publications

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“…Due to the low thermal conductivity of the composite coating, increasing the energy emitted by the LED leads to WLED degradation and hence to a decrease in the light output and a change in the chromatic coordinates of the device [10][11][12]. This problem can be solved by replacing composite coatings with luminescent ceramics [10][11][12][13]. Due to their higher thermal stability and lower temperature sensitivity as compared with those of phosphor layers, luminescent ceramics exhibit higher light conversion efficiency [14].…”

Section: Introductionmentioning

confidence: 99%

Effect of vacuum sintering conditions on the properties of Y3Al5O12 : Ce luminescent ceramics

Tarala¹,

Кравцов²,

Chapura³

et al. 2022

MoEM

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The aim of this work was to study the effect of vacuum sintering conditions and cerium concentration on the optical, luminescent and thermal properties of yttrium-aluminum garnet based ceramics doped with Се3+ cations. Series of ceramic powders were synthesized and samples of luminescent ceramics having the composition Y3-хСехAl5O12 were synthesized where x was in the range 0.01 to 0.025 f.u. We show that the phase composition and grain size distribution of the ceramic powders do not depend on cerium concentration. Without sintering additives, an increase in vacuum sintering temperature from 1675 to 1800 °C leads to an increase in the optical transmittance of luminescent ceramic specimens from 5 to 55% at a 540 nm wavelength and an increase in the thermal conductivity of the samples from 8.4 to 9.5 W/(m ∙ K). It was found that an increase in cerium concentration leads to a shift of the luminescent band peak from 535 to 545 nm where as the width of the luminescent band decreases with an increase in vacuum sintering temperature from 1675 to 1725 °C.

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Section: Introductionmentioning

confidence: 99%

Effect of vacuum sintering conditions on the properties of Y3Al5O12 : Ce luminescent ceramics

Tarala¹,

Кравцов²,

Chapura³

et al. 2022

MoEM

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Highly Efficient Novel Garnet‐Structured Yellow Emitting Phosphor for High Power Laser‐Driven Lighting

Duan,

Bai,

Sun

et al. 2024

Laser & Photonics Reviews

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A novel blue light excitable yellow emitting phosphor, BaLu2(Mg0.6Al2.8Si1.6)O12:Ce3+, with an external quantum efficiency (EQE) of 66.2%, is developed by substituting Al3+‐Al3+ pairs in BaLu2Al4SiO12:Ce3+ with Mg2+‐Si4+ pairs. Alongside the redshift of Ce3+ emission, this substitution also broadened Ce3+ emission and reduced its thermal stability. The spectral changes are found to result from variations in the local crystal field and site symmetry of Ce3+ due to Mg2+‐Si4+ substitution. To assess the feasibility of the newly developed yellow‐emitting phosphor for high‐power laser lighting, it is constructed into a phosphor wheel. Owing to the efficient heat dissipation via high speed rotation of phosphor wheel, the yellow phosphor exhibit a luminous flux of 3894 lm and shows no obvious emission saturation even excited by blue laser light with a power density of 90.7 W mm−2. Exciting the yellow phosphor wheel with a blue laser diode (LDs) at a power density of 25.2 W mm−2 resulted in bright white light with a luminous of 1718.1 lm, a correlated color temperature of 5983 K, a color rendering index of 65.0, and chromatic coordinates of (0.3203, 0.3631). These results suggest that the newly synthesized yellow‐emitting phosphor holds significant potential for high‐power laser‐driven lighting applications.

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Influence of cerium content and heat treatment on Ce:YAG@glass wool nanostructures

et al. 2019

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Synthesis design of Y3Al5O12: Ce3+ phosphor for fabrication of ceramic converter in automotive application

Cited by 12 publications

References 15 publications

Effect of vacuum sintering conditions on the properties of Y3Al5O12 : Ce luminescent ceramics

Effect of vacuum sintering conditions on the properties of Y3Al5O12 : Ce luminescent ceramics

Highly Efficient Novel Garnet‐Structured Yellow Emitting Phosphor for High Power Laser‐Driven Lighting

Influence of cerium content and heat treatment on Ce:YAG@glass wool nanostructures

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