Realizing white emission in Sc2(MoO4)3:Eu3+/Dy3+/Ce3+ phosphors through computation and experiment

Zhu, Rui; Jia, Ke; Bi, Zun; Liu, Yunfei; Lyu, Yinong

doi:10.1016/j.jssc.2020.121592

Cited by 13 publications

(5 citation statements)

References 42 publications

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“…The doping of RE 3+ ions will affect both conduction band and valence band. And the effect on the valence band is more obvious The valence band rises while the conduction band falls, resulting in a decrease in the band gap, which consistent with the literature reported previously [33]. The reduction of the band gap helps the transition of electrons to improve the fluorescence performance.…”

Section: Electronic Structuressupporting

confidence: 90%

Tunable Luminescence Properties and Elucidating the Electronic Structures of Single-Phase Spherical BaWO4: Dy3+, Tm3+, Eu3+ Phosphors for Warm-White-Lighting

Bi¹,

Jia²,

Liu³

et al. 2022

Journal of Renewable Materials

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A series of uniform single-phase spherical BaWO 4 : Dy 3+ , Tm 3+ , Eu 3+ phosphors were prepared via a microwave hydrothermal method by using trisodium citrate dehydrate as surfactant. The phase structure, morphology and photoluminescence properties were measured by powder X-ray diffraction, scanning electron microscope and fluorescence spectrometer, respectively. The results show that uniform spherical microcrystals with diameters in the range of 2-4 μm are obtained. And the phase and morphology of samples are not significantly changed by doping rare earth (RE 3+ ) ions. Under the excitation wavelength of 356 and 365 nm, the samples BaWO 4 : 0.03Dy 3+ , yTm 3+ can emit cold white light. In order to lower the correlated color temperature (CCT) to get a warm white light, the Eu 3+ ions were doped into BaWO 4 : 0.03Dy 3+ , 0.01Tm 3+ . Especially, under the excitation of 365 nm, BaWO 4 : 0.03Dy 3+ , 0.01Tm 3+ , 0.03Eu 3+ phosphor shew a bright warm white light with color coordinate of (0.4013, 0.3629) and CCT of 3288 K. Moreover, in the BaWO 4 : Dy 3+ , Tm 3+ , Eu 3+ phosphors, the energy transfer mechanism among Dy 3+ , Tm 3+ and Eu 3+ ions have been discussed and the change of electron structures have been calculated by first-principles calculations. The results shew that the uniform single-phase spherical BaWO 4 : Dy 3+ , Tm 3+ , Eu 3+ phosphors could be favorable candidates in warm white LEDs.

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Section: Electronic Structuressupporting

confidence: 90%

Tunable Luminescence Properties and Elucidating the Electronic Structures of Single-Phase Spherical BaWO4: Dy3+, Tm3+, Eu3+ Phosphors for Warm-White-Lighting

Bi¹,

Jia²,

Liu³

et al. 2022

Journal of Renewable Materials

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“…Figure 3A shows the PLE and PL spectra of K 3 GdSi 2 O 7 : 0.02Ce 3+ . In the excitation spectrum by monitoring the 510 nm emission, there are two excitation bands peaked at 329 and 387 nm, which can be ascribed to the 4f → 5d 2 and 4f → 5d 1 transitions of Ce 3+ , respectively 14,19 . At irradiation by 365 nm, the PL spectrum is made up of a broad emission band ranging from 400 to 650 nm with a maximum of 515 nm.…”

Section: Resultsmentioning

confidence: 99%

“…In the excitation spectrum by monitoring the 510 nm emission, there are two excitation bands peaked at 329 and 387 nm, which can be ascribed to the 4f → 5d 2 and 4f → 5d 1 transitions of Ce 3+ , respectively. 14,19 At irradiation by 365 nm, the PL spectrum is made up of a broad emission band ranging from 400 to 650 nm with a maximum of 515 nm. Figure 3B,C demonstrates that the replacement of K + by Rb + ions can cause the phenomena with the spectral shift.…”

Section: Resultsmentioning

confidence: 99%

Tunable emission of Ce³⁺ in (K, Rb)₃GdSi₂O₇ phosphors toward broadband cyan luminescence

Li,

Huang,

Hua

et al. 2024

J Am Ceram Soc.

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In an effort to obtain a novel cyan‐emitting phosphor, the [K1‐xRbx]3GdSi2O7: yCe3+ materials (x = 0, 0.1, 0.2, 0.3, 0.4, y = 0, 0.005, 0.01, 0.02, 0.03, 0.04) are synthesized via a solid‐state reaction pathway, and their crystal structure and luminescence behaviors are studied systematically. The chemical substitution of Rb+ in the K+ sites can enlarge the K3GdSi2O7 host lattice and help to the blue‐shifting of emission band of Ce3+ ions due to the decreased crystal field splitting effect. It is also confirmed that the Ce3+ ions tend to enter [Gd1O6] and [Gd2O6] polyhedrons simultaneously. Consequently, the [K0.7Rb0.3]3GdSi2O7: Ce3+ phosphor yields a broadband cyan emission centered at 492 nm with the full width at half maximum (FWHM) of ∼115 nm upon 365 nm excitation. The optimal concentration of Ce3+ dopant is determined to be 0.01, and the concentration quenching effect can be attributed to the dipole−dipole interactions. The white light emitting diode (WLED) device fabricated by employing the discovered [K0.7Rb0.3]3GdSi2O7: 0.01Ce3+ phosphor displays a high color rendering index (Ra = 91.7) and a low correlated color temperature (CCT = 3749 K). This work may promote the development of cyan phosphors for near ultraviolet‐converted WLEDs with high performance.

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“…The calculated band structure and densities of states (DOS) verified that the SMO host is a wide‐band semiconductor with an indirect band gap of 3.68 eV, which agrees with past reports (Figure S12, Supporting Information). [ 23 ] The SMO conduction band bottom (CBB) is a mixture of Mo‐ d and O‐ p orbitals, whereas its valence band top (VBT) is predominantly of O‐ p orbitals. The same statement can also be applied to the doped SMOE and SMOT samples.…”

Section: Resultsmentioning

confidence: 99%

Interplay of Consecutive Energy Transfer and Negative Thermal Expansion Property for Achieving Superior Anti‐Thermal Quenching Luminescence

Jahanbazi,

Dimakis,

Mao

2023

Advanced Optical Materials

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Luminescence thermal quenching (TQ) is one of the most critical problems to be solved for further improvement of phosphors’ applications in lighting and many other fields. Herein, a novel strategy is demonstrated to achieve outstanding anti‐TQ performance with a substantial enhancement of Eu3+ red emission at 613 nm from Sc2MO3O12:Tb3+,Eu3+ phosphor. Its anti‐TQ performance is endowed by dual energy transfer (ET) pathways and intensified by the negative thermal expansion (NTE) property of the Sc2MO3O12 host. Remarkably, the photoluminescence (PL) emission intensity of Eu3+ from Sc2MO3O12:20%Eu3+,2%Tb3+ phosphor at 648 K reaches 507.3% of the initial intensity taken at 298 K. The lifetime of Eu3+ emission at 613 nm elongates with increasing measurement temperature. The experimental data and density functional theory (DFT) calculations reveal that the host structure shrinkage via NTE leads to the thermally boosted Eu3+ red emission by intensifying the consecutive ET and confinement of the absorption light. The potential of this phosphor as a dual‐mode high temperature thermometer based on both emission lifetime and intensity ratio read‐out modes is realized. This work provides inspiration to combine multiple strategies to achieve broad and dramatic anti‐TQ phosphors with enhanced performance for various optical applications.

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Realizing white emission in Sc2(MoO4)3:Eu3+/Dy3+/Ce3+ phosphors through computation and experiment

Cited by 13 publications

References 42 publications

Tunable Luminescence Properties and Elucidating the Electronic Structures of Single-Phase Spherical BaWO4: Dy3+, Tm3+, Eu3+ Phosphors for Warm-White-Lighting

Tunable Luminescence Properties and Elucidating the Electronic Structures of Single-Phase Spherical BaWO4: Dy3+, Tm3+, Eu3+ Phosphors for Warm-White-Lighting

Tunable emission of Ce³⁺ in (K, Rb)₃GdSi₂O₇ phosphors toward broadband cyan luminescence

Interplay of Consecutive Energy Transfer and Negative Thermal Expansion Property for Achieving Superior Anti‐Thermal Quenching Luminescence

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Realizing white emission in Sc2(MoO4)3:Eu3+/Dy3+/Ce3+ phosphors through computation and experiment

Cited by 13 publications

References 42 publications

Tunable Luminescence Properties and Elucidating the Electronic Structures of Single-Phase Spherical BaWO4: Dy3+, Tm3+, Eu3+ Phosphors for Warm-White-Lighting

Tunable Luminescence Properties and Elucidating the Electronic Structures of Single-Phase Spherical BaWO4: Dy3+, Tm3+, Eu3+ Phosphors for Warm-White-Lighting

Tunable emission of Ce3+ in (K, Rb)3GdSi2O7 phosphors toward broadband cyan luminescence

Interplay of Consecutive Energy Transfer and Negative Thermal Expansion Property for Achieving Superior Anti‐Thermal Quenching Luminescence

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Tunable emission of Ce³⁺ in (K, Rb)₃GdSi₂O₇ phosphors toward broadband cyan luminescence