Full-visible-spectrum lighting enabled by an excellent cyan-emitting garnet phosphor

Liang, Jia; Devakumar, Balaji; Sun, Liangling; Wang, Shaoying; Sun, Qi; Huang, Xiaoyong

doi:10.1039/d0tc00006j

Cited by 236 publications

(95 citation statements)

References 72 publications

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“…The luminescent properties of phosphors are affected by the doped rare earth ions, as well as the structure and composition of the substance host [11,12]. Tungstate materials are considered to be effective self-activated fluorescent materials with high-absorption cross-sections [13,14], broadband emissions [15], and high quantum efficiency [16,17].…”

Section: Introduction mentioning

confidence: 99%

Effect of anionic group [SiO4]4−/[PO4]3− on the luminescence properties of Dy3+-doped tungstate structural compounds

et al. 2021

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Novel scheelite structures of Li2Ca(WO4)2, Li2Ca2(WO4)(SiO4), and LiCa2(WO4)(PO4) fluorescent materials were successfully prepared using a high-temperature solid-phase process. The compounds were characterized by X-ray diffraction and energy dispersive spectroscopy. The tests revealed that the substitution of [WO4]2− by [SiO4]4− or [PO4]3− tetrahedron in tungstate had no significant influence on the crystal structure of the Li2Ca(WO4)2. When Dy3+ ions were introduced as an activator at an optimum doping concentration of 0.08 mol%, all of the as-prepared phosphors generated yellow light emissions, and the emission peak was located close to 576 nm. Replacing [WO4]2− with [SiO4]4− or [PO4]3− tetrahedron significantly increased the luminescence of the Li2Ca(WO4)2 phosphors. Among them, the LiCa2(WO4)(PO4):0.08Dy3+ phosphor had the best luminescence properties, decay life (τ = 0.049 ms), and thermal stability (87.8%). In addition, the as-prepared yellow Li2Ca(WO4)2:0.08Dy3+, Li2Ca2(WO4)(SiO4):0.08Dy3+, and LiCa2(WO4)(PO4):0.08Dy3+ phosphor can be used to fabricate white light emitting diode (LED) devices.

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Section: Introduction mentioning

confidence: 99%

Effect of anionic group [SiO4]4−/[PO4]3− on the luminescence properties of Dy3+-doped tungstate structural compounds

et al. 2021

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“…The near UV excitation gave impressive results from a CRI point of view, reaching a value close to the unity in the BaMgAl 10 O 17 :Eu 2+ , Ca 9 La(PO 4 ) 7 :Eu 2+ ,Mn 2+ double phosphors, Eu 2+ , Dy 3+ , Ce 3+ /Tb 3+ , β-Na 2 Ca 4 (PO 4 ) 2 (SiO 4 ), and in Ce 3+ -doped Ca 2 YHf 2 Al 3 O 12 [64][65][66].…”

Section: Session 3: Rare-earth-based Phosphorsmentioning

confidence: 93%

Assessment of Crystalline Materials for Solid State Lighting Applications: Beyond the Rare Earth Elements

Ricci

2020

Crystals

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In everyday life, we are continually exposed to different lighting systems, from the home interior to car lights and from public lighting to displays. The basic emission principles on which they are based range from the old incandescent lamps to the well-established compact fluorescent lamps (CFL) and to the more modern Light Emitting Diode (LEDs) that are dominating the actual market and also promise greater development in the coming years. In the LED technology, the key point is the electroluminescence material, but the fundamental role of proper phosphors is sometimes underestimated even when it is essential for an ideal color rendering. In this review, we analyze the main solid-state techniques for lighting applications, paying attention to the fundamental properties of phosphors to be successfully applied. Currently, the most widely used materials are based on rare-earth elements (REEs) whereas Ce:YAG represents the benchmark for white LEDs. However, there are several drawbacks to the REEs’ supply chain and several concerns from an environmental point of view. We analyze these critical issues and review alternative materials that can overcome their use. New compounds with reduced or totally REE free, quantum dots, metal–organic framework, and organic phosphors will be examined with reference to the current state-of-the-art.

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“…Coincidentally, Ce 3+ ions can broaden the absorption band of the Tb 3+ ions and are regarded as efficient sensitizers for the Tb 3+ ions because the energy can be transferred from the Ce 3+ to Tb 3+ ions 33,34 . Moreover, Ce 3+ ions as activators present excellent luminescence performance and have made great progress in laser‐driven lighting and white‐LED 35,36,37 …”

Section: Introductionmentioning

confidence: 99%

“…33,34 Moreover, Ce 3+ ions as activators present excellent luminescence performance and have made great progress in laser-driven lighting and white-LED. 35,36,37 As we all know, there are many factors to determine the luminescent properties of rare-earth ions, of which the host plays a critical factor. Based on previous reports, one knows that orthoborate systems (1-1-1-3 composition type) with general formula NaMBO 3 (M = Ca, Sr, Ba) are appropriate host for rare-earth ions.…”

mentioning

confidence: 99%

Ce³⁺/Tb³⁺‐coactived NaMgBO₃ phosphors toward versatile applications in white LED, FED, and optical anti‐counterfeiting

Xue

Noh

et al. 2021

J Am Ceram Soc

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Rare-earth-activated phosphors have made great achievements in various fields including white light-emitting diode (white-LED), field emission displays (FEDs), anticounterfeiting, optical thermometry, photocatalytic, and optical biomarkers, since they can convert the incident light into diverse useful emissions. [1][2][3][4][5][6][7][8][9][10][11] Among them, great progress has been achieved in white-LED since it shows many irreplaceable advantages, such as energy saving, high efficient, non-pollution, and long service lifetime. To fabricate white-LED, a commercial strategy by integrating a blue chip with yellow Y 3 Al 5 O 12 :Ce 3+ phosphor was developed. 12 However, this industrial method still exists drawbacks of insufficient red light components and "blue spikes," leading to some fatal problems, such as high correlated color temperature (CCT >7000 K), low color-rendering index (CRI <75), blue light hazard, uncomfortable glare. 13,14 To overcome these aforementioned defects, researchers have proposed a promising approach, which is combining a near-ultraviolet (near-UV)

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Full-visible-spectrum lighting enabled by an excellent cyan-emitting garnet phosphor

Abstract: Cyan-emitting Ca2YHf2Al3O12:xCe3+ garnet phosphors with a high photoluminescence quantum efficiency of up to 89.5% were developed for fabricating high color rendering warm-white LEDs.

Cited by 236 publications

References 72 publications

Effect of anionic group [SiO4]4−/[PO4]3− on the luminescence properties of Dy3+-doped tungstate structural compounds

Effect of anionic group [SiO4]4−/[PO4]3− on the luminescence properties of Dy3+-doped tungstate structural compounds

Assessment of Crystalline Materials for Solid State Lighting Applications: Beyond the Rare Earth Elements

Ce³⁺/Tb³⁺‐coactived NaMgBO₃ phosphors toward versatile applications in white LED, FED, and optical anti‐counterfeiting

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Full-visible-spectrum lighting enabled by an excellent cyan-emitting garnet phosphor

Abstract: Cyan-emitting Ca2YHf2Al3O12:xCe3+ garnet phosphors with a high photoluminescence quantum efficiency of up to 89.5% were developed for fabricating high color rendering warm-white LEDs.

Cited by 236 publications

References 72 publications

Effect of anionic group [SiO4]4−/[PO4]3− on the luminescence properties of Dy3+-doped tungstate structural compounds

Effect of anionic group [SiO4]4−/[PO4]3− on the luminescence properties of Dy3+-doped tungstate structural compounds

Assessment of Crystalline Materials for Solid State Lighting Applications: Beyond the Rare Earth Elements

Ce3+/Tb3+‐coactived NaMgBO3 phosphors toward versatile applications in white LED, FED, and optical anti‐counterfeiting

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Ce³⁺/Tb³⁺‐coactived NaMgBO₃ phosphors toward versatile applications in white LED, FED, and optical anti‐counterfeiting