Influence of codoping on the luminescence properties of YAG:Dy for high temperature phosphor thermometry

Hertle, Ellen; Chepyga, Liudmyla M.; Batentschuk, Miroslaw; Zigan, Lars

doi:10.1016/j.jlumin.2016.10.033

Cited by 49 publications

(14 citation statements)

References 49 publications

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“…The main peak between 32.6 and 33.8 was found to be slightly offset to low-angle in Fig. 1(d ] site of the matrix effectively which is similar to the literature review reported by Liudmyla M. et al 43 and Chen et al 32 . Generally, Mn 4+ activator likes to replace the Al 3+ in [AlO 6 ] site because Mn 4+ has the similar ionic radii to Al 3+ and octahedron are unstable compared to tetrahedron.…”

Section: Structure Characterization and Phase Identicationsupporting

confidence: 87%

Enhanced photoluminescence and energy transfer performance of Y₃Al₄GaO₁₂:Mn⁴⁺,Dy³⁺ phosphors for plant growth LED lights

Xia

Zhou

et al. 2019

RSC Adv.

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Section: Structure Characterization and Phase Identicationsupporting

confidence: 87%

Enhanced photoluminescence and energy transfer performance of Y₃Al₄GaO₁₂:Mn⁴⁺,Dy³⁺ phosphors for plant growth LED lights

Xia

Zhou

et al. 2019

RSC Adv.

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“…Emission intensity from the "F" level is observed to decrease with increasing temperature, while the opposite occurs for the "G" level. Qualitatively, the spectral response with temperature was found to be different when compared to the published literature [22] [24]. This is believed to be associated with the relatively large dopant concentration used in this study as compared to others, which may alter the photophysical properties of the phosphors and thereby change the internal energy transfer rates yielding a different emission spectrum.…”

Section: Characterization Of Yag:dymentioning

confidence: 53%

Development of a spatially resolved optical technique for measuring heat flux and thermal footprint of firebrand piles

Abul-Huda¹

2019

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Firebrand showers have been identified as a primary mechanism of fire spread and cause of destruction in wildland-urban interface fires. The heat transfer processes that follow deposition of firebrands and lead to ignition have received little attention until recently. While conventional methods of measuring temperature and heat flux provide bulk-averaged information regarding deposited firebrand piles, they fall short of elucidating essential information such as surface contact areas and heat feedback mechanisms, that are necessary for understanding ignition propensity and developing high-fidelity physics-based models. This work describes the development and implementation of a spatially resolved optical technique for quantifying heat flux and thermal footprint of firebrand piles using laser induced phosphorescence of YAG:Dy. The technique involves coating the surface of a UVtransparent substrate with YAG:Dy phosphors to yield surface temperature. Heat flux is inferred through simultaneously measuring the top and bottom substrate surface temperatures after they are coated with a staggered grating pattern. An intensity ratio over two separate spectral regions of emission is used to calibrate the optical measurement system and infer temperature from 300 K-1100 K over a 7 cm diameter interrogation area. The uncertainty in temperature and heat flux are discussed in detail. The spatial resolution of the temperature and heat flux measurements are 0.5 mm and 4 mm, respectively.

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“…Among them, depending on the PL intensity values, we chose a Lu 3+ concentration of approximately 5% (Figure S4) and determined the concentration quenching limit of Eu 2+ ions in the NSPO structure, as shown in Figure b. Typically, Co doping in phosphors is undesirable because it diminishes the luminescence properties by forming luminescence quenchers near the luminescent centers of a given material . Therefore, to understand the role of Lu 3+ doping on the luminescence properties of the NSPO:3% Eu 2+ phosphor, we measured the time-resolved PL properties and PL QY values as a function of Lu 3+ doping in NSPO:3% Eu 2+ .…”

Section: Resultsmentioning

confidence: 99%

Correlated Na⁺ Ion Migration Invokes Zero Thermal Quenching in a Sodium Superionic Conductor-type Phosphor

et al. 2021

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Among the many potential Eu 2+ -activated sodium superionic conductor (NASICON)-based host materials, the Sc 3+based NASICON phosphor (Na 3 Sc 2 (PO 4 ) 3 :Eu 2+ ) is a promising phosphor material for high-power lighting applications owing to its unusual thermal stability at elevated temperatures. It has previously been shown that negative thermal quenching (TQ) can be tailored to zero TQ depending on the Eu 2+ concentration. However, the obtained zero-TQ composition has low photoluminescent quantum yields, which hinders its applicability to high-power lighting. Herein, we report a holistic study of the tuning of thermal stability from negative TQ to zero TQ while preserving the original emission efficiency by introducing Lu 3+ ions in Na 3 Sc 2 (PO 4 ) 3 :Eu 2+ . Furthermore, we fabricated a high-power white light-emitting diode using optimized Lu 3+ -doped Na 3 Sc 2 (PO 4 ) 3 :Eu 2+ as the blue component, delivering a high color-rendering index value of 90 with a high luminous efficiency value of 25 lm/W obtained at a flux current of 1000 mA. Therefore, the findings of this work provide novel scientific insights into the importance of structure−property relationships in designing highly efficient thermally stable phosphors for high-power lighting applications.

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Influence of codoping on the luminescence properties of YAG:Dy for high temperature phosphor thermometry

Cited by 49 publications

References 49 publications

Enhanced photoluminescence and energy transfer performance of Y₃Al₄GaO₁₂:Mn⁴⁺,Dy³⁺ phosphors for plant growth LED lights

Enhanced photoluminescence and energy transfer performance of Y₃Al₄GaO₁₂:Mn⁴⁺,Dy³⁺ phosphors for plant growth LED lights

Development of a spatially resolved optical technique for measuring heat flux and thermal footprint of firebrand piles

Correlated Na⁺ Ion Migration Invokes Zero Thermal Quenching in a Sodium Superionic Conductor-type Phosphor

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Influence of codoping on the luminescence properties of YAG:Dy for high temperature phosphor thermometry

Cited by 49 publications

References 49 publications

Enhanced photoluminescence and energy transfer performance of Y3Al4GaO12:Mn4+,Dy3+ phosphors for plant growth LED lights

Enhanced photoluminescence and energy transfer performance of Y3Al4GaO12:Mn4+,Dy3+ phosphors for plant growth LED lights

Development of a spatially resolved optical technique for measuring heat flux and thermal footprint of firebrand piles

Correlated Na+ Ion Migration Invokes Zero Thermal Quenching in a Sodium Superionic Conductor-type Phosphor

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Enhanced photoluminescence and energy transfer performance of Y₃Al₄GaO₁₂:Mn⁴⁺,Dy³⁺ phosphors for plant growth LED lights

Enhanced photoluminescence and energy transfer performance of Y₃Al₄GaO₁₂:Mn⁴⁺,Dy³⁺ phosphors for plant growth LED lights

Correlated Na⁺ Ion Migration Invokes Zero Thermal Quenching in a Sodium Superionic Conductor-type Phosphor