Observation of a red Ce3+ center in SrLu2O4:Ce3+ phosphor and its potential application in temperature sensing

Zhang, Sheng; Hao, Zhendong; Zhang, Liangliang; Pan, Guohui; Wu, Huajun; Wu, Hao; Luo, Yongshi; Liu, Xingyuan; Zhang, Hong; Zhang, Jiahua

doi:10.1039/c9dt00789j

Cited by 23 publications

(7 citation statements)

References 38 publications

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“…The activation energy ( E a ) can be expressed for both phosphors by the Arrhenius equation: , Here, I 0 and I T are the initial PL intensity and the PL intensity at different temperatures ( T ), respectively. A represents a constant and k represents the Boltzmann constant.…”

Section: Results and Discussionmentioning

confidence: 99%

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Highly Efficient Cyan-Green Emission in Self-Activated Rb₃RV₂O₈ (R = Y, Lu) Vanadate Phosphors for Full-Spectrum White Light-Emitting Diodes (LEDs)

et al. 2020

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Phosphor-converted white-light-emitting diodes (pc-WLEDs) rely on combining a near-ultraviolet (n-UV) or blue chip with trichromatic and yellow-emitting phosphors. It is challenging to discover cyan-green-emitting (480–520 nm) phosphors for compensating the spectral gap and producing full-spectrum white light. In this work, we successfully discovered two unprecedented bright cyan-green emitting Rb3RV2O8 (R = Y, Lu) phosphors that gives emission bands centered at 500 nm upon 362 nm n-UV light excitation. Interestingly, the both self-activated compounds exhibit high internal quantum efficiencies (IQEs) of 71% for Rb3YV2O8 and 85% for Rb3LuV2O8, respectively. Moreover, controllable emission color can be successfully tuned from cyan-green to orange-red across the warm white light region by design strategy of VO4 3– → Eu3+ energy transfer. The thermal quenching of as-prepared phosphors could be effectively mitigated by this design strategy. Finally, the as-fabricated n-UV (λex = 370 nm) pumped phosphor-converted (pc) W-LED devices utilizing Rb3RV2O8 (R = Y, Lu) along with commercial phosphors demonstrate well-distributed warm white light with high color-rendering index (CRI) of 91.9 and 93.5, and a low correlated color temperature (CCT) of 5095 and 4946 K. It suggests that the both vanadate phosphors have potential applications in full-spectrum pc-WLEDs.

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Section: Results and Discussionmentioning

confidence: 99%

“…Thermal stability acts as an important parameter for LED phosphors to produce high-quality lighting for practical application of pc-WLED. 58,59 Figure 10a The activation energy (E a ) can be expressed for both phosphors by the Arrhenius equation: 60,61…”

Section: ■ Introductionmentioning

confidence: 99%

Highly Efficient Cyan-Green Emission in Self-Activated Rb₃RV₂O₈ (R = Y, Lu) Vanadate Phosphors for Full-Spectrum White Light-Emitting Diodes (LEDs)

et al. 2020

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“…, Eu 2+ /Eu 3+ and Ti 3+ /Ti 4+ ); the former is usually simple to prepare but there is a risk of overlapping broad emission peaks at different lattice positions, leading to errors in processing the integrated intensity, while the latter allows for high sensitivity measurements but it is difficult to adjust the ratio of ions in different oxidation states during the preparation process, thus limiting the development of such FIR thermometers. 27–31 Among optical materials with two luminescent centers, such as Re/QDs hybrid nanostructures, Re/transition metal (TM) ions ( e.g. , Tb 3+ /Cr 3+ , Er 3+ /Mn 4+ , and Eu 3+ /Mn 4+ ) and Re/Re ( e.g.…”

Section: Introductionmentioning

confidence: 99%

High-sensitivity NaYF₄:Yb³⁺/Ho³⁺/Tm³⁺ phosphors for optical temperature sensing based on thermally coupled and non-thermally coupled energy levels

et al. 2023

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“…Binary rare-earth (RE) oxides ARE 2 O 4 , where A is Ba, Ca, Sr, or Eu, have been actively studied for their potential in various applications, particularly in optics and photoluminescence [1][2][3][4][5]. The high density of the materials and large magnetic moments associated with the RE ions also make them promising for low-temperature demagnetization cooling applications, as magnetocaloric effects are significant [6,7].…”

Section: Introductionmentioning

confidence: 99%

Fragile ground state and rigid field-induced structures in the zigzag ladder compound BaDy2O4

et al. 2021

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We report on a sequence of field-induced transitions in the zigzag ladder compound BaDy2O4 studied with powder neutron diffraction and magnetisation measurements. In agreement with the previously published results, the low temperature zero-field structure is characterised by two half-integer propagation vectors, k1 = [ 1 2 0 1 2 ] and k2 = [ 1 2 1 2 1 2 ]. However, on application of an external magnetic field, the Bragg peaks corresponding to the zero-field structure lose their intensity rather rapidly and disappear completely in a field of 2.5 kOe. In the intermediate fields, 2.5 to 22.5 kOe, new peaks are observed characterised by the propagation vector k = [0 0 1 3 ] corresponding to an up-up-down (uud) structure as well k = 0 ferromagnetic peaks. This regime of fields corresponds to a pronounced plateau in the magnetisation curve. Remarkably, the uud structure survives heating to at least 1.4 K, three times higher temperature than the TN of 0.48 K for the zero-field structure. Above 22.5 kOe, the k peaks disappear while the k = 0 peaks gain significant intensity indicating an increase in the polarisation of the system. The analysis of the intensities of the field-induced reflections allows for a clear identification of the magnetic structures in both the intermediate and high field regimes.

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Observation of a red Ce³⁺ center in SrLu₂O₄:Ce³⁺ phosphor and its potential application in temperature sensing

Abstract: In Ce3+ activated SrLn2O4 type phosphors (Ln = Y, Lu, Sc, etc.) only one Ce3+ center was previously reported to show a blue emission band.

Cited by 23 publications

References 38 publications

Highly Efficient Cyan-Green Emission in Self-Activated Rb₃RV₂O₈ (R = Y, Lu) Vanadate Phosphors for Full-Spectrum White Light-Emitting Diodes (LEDs)

Highly Efficient Cyan-Green Emission in Self-Activated Rb₃RV₂O₈ (R = Y, Lu) Vanadate Phosphors for Full-Spectrum White Light-Emitting Diodes (LEDs)

High-sensitivity NaYF₄:Yb³⁺/Ho³⁺/Tm³⁺ phosphors for optical temperature sensing based on thermally coupled and non-thermally coupled energy levels

Fragile ground state and rigid field-induced structures in the zigzag ladder compound BaDy2O4

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Observation of a red Ce3+ center in SrLu2O4:Ce3+ phosphor and its potential application in temperature sensing

Abstract: In Ce3+ activated SrLn2O4 type phosphors (Ln = Y, Lu, Sc, etc.) only one Ce3+ center was previously reported to show a blue emission band.

Cited by 23 publications

References 38 publications

Highly Efficient Cyan-Green Emission in Self-Activated Rb3RV2O8 (R = Y, Lu) Vanadate Phosphors for Full-Spectrum White Light-Emitting Diodes (LEDs)

Highly Efficient Cyan-Green Emission in Self-Activated Rb3RV2O8 (R = Y, Lu) Vanadate Phosphors for Full-Spectrum White Light-Emitting Diodes (LEDs)

High-sensitivity NaYF4:Yb3+/Ho3+/Tm3+ phosphors for optical temperature sensing based on thermally coupled and non-thermally coupled energy levels

Fragile ground state and rigid field-induced structures in the zigzag ladder compound BaDy2O4

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Observation of a red Ce³⁺ center in SrLu₂O₄:Ce³⁺ phosphor and its potential application in temperature sensing

Highly Efficient Cyan-Green Emission in Self-Activated Rb₃RV₂O₈ (R = Y, Lu) Vanadate Phosphors for Full-Spectrum White Light-Emitting Diodes (LEDs)

Highly Efficient Cyan-Green Emission in Self-Activated Rb₃RV₂O₈ (R = Y, Lu) Vanadate Phosphors for Full-Spectrum White Light-Emitting Diodes (LEDs)

High-sensitivity NaYF₄:Yb³⁺/Ho³⁺/Tm³⁺ phosphors for optical temperature sensing based on thermally coupled and non-thermally coupled energy levels