Ce/Mn/Cr: Y3Al5O12 phosphor ceramics for white LED and LD lighting with a high color rendering index

Li, Yukun; Liu, Yongfu; Luo, Zhaohua; Liu, Zehua; Hanson, Svenja; Pang, Cheng Heng; Lin, Hui; H, Qin; Jiang, Jun

doi:10.1016/j.ceramint.2023.04.205

Cited by 13 publications

(2 citation statements)

References 37 publications

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“…The former is a non-radiative process while the latter consists of radiative and non-radiative components. The electron transition and luminescence principle of Cr 3+ and Mn 2+ in the YAG crystal lattice, as well as the energy transfer mechanism from Ce 3+ to Cr 3+ /Mn 2+ , were discussed in our previous study [34]. In this research, we focus on the shift of emission bands in [CeO 8 ] caused by substituting Gd 3+ , Tb 3+ and Lu 3+ for Y 3+ .…”

Section: Resultsmentioning

confidence: 98%

“…Currently, there is little research combining these two methods to achieve a high CRI of phosphor ceramics. Previously, we reported Ce/Mn/Cr: Y 3 Al 5 O 12 phosphor ceramics [34]. Intense energy transfer from Ce 3+ to Mn 2+ /Cr 3+ is obtained by both nonradiative and radiative processes, demonstrating the versatility of Ce 3+ as activators and sensitizers.…”

Section: Introductionmentioning

confidence: 91%

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Ce/Mn/Cr: (Re,Y)3Al5O12 Phosphor Ceramics (Re = Gd, Tb and Lu) for White LED Lighting with Significant Spectral Redshift and Improved Color-Rendering Index

Li,

Hanson,

Pang

et al. 2023

Materials

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In order to attain phosphor ceramics with a high Color-Rendering Index (CRI), samples with the composition of Y0.997−xRexCe0.003)3(Al0.9748 Mn2+0.024Cr3+0.0012)5O12(Rex = 0, Gd0.333, Gd0.666, Gd0.997, Tb0.333, Tb0.666, Tb0.997 and Lu0.997 were prepared by solid-state reaction and vacuum sintering, and exhibited potential for high-quality, solid-state lighting. Doping with Cr3+ and Mn2+ effectively enhanced the red component of Ce3+ spectra through the intense energy transfer from Ce3+ ions to Mn2+/Cr3+ ions. The crystal field splitting of [GdO8] and [TbO8] was more extensive than that of [YO8], causing a massive redshift in the Ce3+ emission peaks from 542 to 561 and 595 nm, while [LuO8] had an opposite effect and caused a blueshift with a peak position at 512 nm. White LED devices incorporating Ce/Mn/Cr: (Gd0.333Y0.664)3Al5O12 phosphor ceramic exhibited a high CRI of 83.97, highlighting the potential for enhancing the red-light component of white LED lighting.

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Section: Resultsmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 91%

Ce/Mn/Cr: (Re,Y)3Al5O12 Phosphor Ceramics (Re = Gd, Tb and Lu) for White LED Lighting with Significant Spectral Redshift and Improved Color-Rendering Index

Li,

Hanson,

Pang

et al. 2023

Materials

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Novel Color Converters for High Brightness Laser‐Driven Projection Display: Transparent Ceramics–Glass Ceramics Film Composite

Liao,

Jin,

Pang

et al. 2023

Adv Funct Materials

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Laser‐driven projection display puts forward urgent demand for color converter materials to simultaneously achieve balanced‐spectrum properties and strong heat dissipation. Herein, this work develops a novel optofunctional composite by coupling Y3Al5O12:Ce3+ transparent ceramics (TC) with CaAlSiN3:Eu2+ phosphor‐in‐glass film (PiGF) for the first time. Remarkably, this new material architecture design enables a balance between the spectrum properties and heat dissipation ability, and can yield high‐quality white light with brightness of over 2500 lm, luminous efficacy (LE) of over 200 lm W−1, correlated color temperature (CCT) of 3700–4100 K, and improved color rendering index (CRI) of 60–70. Furthermore, the PiGF@TC‐converted laser projection system is also successfully designed, showing natural and real color restoration. Additionally, the combined action of thermal quenching and optical excitation intensity quenching is confirmed for the luminescence saturation upon high‐power blue laser driven. The main mechanism of optical quenching is identified to be energy upconversion dominated by second‐order nonlinear processes. The findings described here suggest a step toward developing the admirable laser‐driven color converters for next‐generation lighting sources.

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Ce3+,Cr3+ co-doped garnet phosphors with yellow and near-infrared emission for white and near-IR dual-mode pc-LEDs

Wu,

Tang,

Han

et al. 2024

Sci. China Mater.

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Ce/Mn/Cr: Y3Al5O12 phosphor ceramics for white LED and LD lighting with a high color rendering index

Cited by 13 publications

References 37 publications

Ce/Mn/Cr: (Re,Y)3Al5O12 Phosphor Ceramics (Re = Gd, Tb and Lu) for White LED Lighting with Significant Spectral Redshift and Improved Color-Rendering Index

Ce/Mn/Cr: (Re,Y)3Al5O12 Phosphor Ceramics (Re = Gd, Tb and Lu) for White LED Lighting with Significant Spectral Redshift and Improved Color-Rendering Index

Novel Color Converters for High Brightness Laser‐Driven Projection Display: Transparent Ceramics–Glass Ceramics Film Composite

Ce3+,Cr3+ co-doped garnet phosphors with yellow and near-infrared emission for white and near-IR dual-mode pc-LEDs

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