A potential red-emitting phosphor Ca2YTaO6:Eu3+: Luminescence properties, thermal stability and applications for white LEDs

Ding, Ka; Siru, A.; Pang, Shuo; Shan, Leyan; Zhang, Yaqi; Sun, Pengfei; Deng, Bin; Yu, Ruijin

doi:10.1016/j.jre.2020.07.006

Cited by 39 publications

(9 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Impressively, the PL intensity of Sm 3+ ions in LGO: Sm 3+ , Mn 4+ presents great thermal stability in the high-temperature region (473-573 K), which is superior to that of the commercial phosphor (Table S1). [28][29][30][31][32][33][34] The photographs of LGO: 0.01Sm 3+ , 0.001Mn 4+ under UV irradiation at different temperatures (293-573 K) is shown in Figure 3C, which indicates that emitting color changes from deep red to bright orange. Besides, the observed recoverable properties of the as-explored phosphors for the increased and decreased ambient temperature suggest the potential application of it as a temperature sensor.…”

Section: Resultsmentioning

confidence: 99%

Highly sensitive optical thermometer of Sm³⁺, Mn⁴⁺ activated LaGaO₃ phosphor for the regulated thermal behavior

Wang

et al. 2021

J Am Ceram Soc.

View full text Add to dashboard Cite

Sm 3+ , Mn 4+ co-activated LaGaO 3 phosphors, giving the characteristic emissions of orange and red emission simultaneously, were prepared by a solid-state reaction. Their luminescence properties, energy transfer behavior, thermal stability, and ratiometric temperature sensing performance were investigated. Thanks to the inhibition of energy transfer between Sm 3+ and Mn 4+ ions at high temperature and the reconstruction of the traps, the distinct optical behavior of the involved activators dependent on the ambient temperature was evaluated. Antithermal quenching performance of Sm 3+ ions along with the emission declination of Mn 4+ ions was observed. Hence, the optical thermometry characteristics of the resultant phosphor based on the fluorescent intensity ratio (orange/red) realize a recorded temperature sensitivity of 4.19% K −1 and 2.09% K −1 . Moreover, the as-explored film combined with the LaGaO 3 : Sm 3+ , Mn 4+ phosphor is demonstrated to be a promising multi-color optical thermometer.

show abstract

Section: Resultsmentioning

confidence: 99%

Highly sensitive optical thermometer of Sm³⁺, Mn⁴⁺ activated LaGaO₃ phosphor for the regulated thermal behavior

Wang

et al. 2021

J Am Ceram Soc.

View full text Add to dashboard Cite

show abstract

“…Here, I ( T ) represents the intensity at distinct temperature ( T ), I 0 represents the initial intensity, k denotes the Boltzmann's constant (8.629 10 −5 eV/K), c indicates a constant, and Ea signifies the activation energy. The Ea of SrZr 2 CaLa 2 O 8 :Eu 3+ has been 0.20 eV, which is greater than certain phosphors previously published, like Ca 2 YTaO 6 :Eu 3+ (Ea = 0.13 eV) [35], Gd 2 GeO 5 :Bi 3+ /Eu 3+ (Ea = 0.189 eV) [36], and NaGdF 4 :Eu 3+ (Ea = 0.18 eV) [37]. This demonstrates that the material has good thermal stability and is shown in the relationship between ln[( I 0 / I ) − 1] and 1/ T in Figure 14.…”

Section: Resultsmentioning

confidence: 76%

“…Relative PL intensity of the phosphor SrZr 2 CaLa 2 O 8 :Eu 3+ from initial temperature of 30-150 C drops to 24% as shown in Figure 13 which is much less than commercially available phosphor, thus SrZr 2 CaLa 2 O 8 :Eu 3+ phosphor under study shows excellent thermal stability. The intensity drop from room temperature to 150 C is due to thermal quenching [33] and the relation between temperature and intensity is given by the Arrhenius formula [34], Eu 3+ (Ea = 0.13 eV) [35], Gd 2 GeO 5 :Bi 3+ /Eu 3+ (Ea = 0.189 eV) [36],…”

Section: Photoluminescence Studiesmentioning

confidence: 99%

Studies on a novel SrZr₂CaLa₂O₈:Eu³⁺ phosphor for lighting applications emitting direct white light

Aitha,

Dinakar,

Murthy

et al. 2023

Luminescence

View full text Add to dashboard Cite

Direct white light emitting phosphors play a significant role in the display industry due to their ability to improve the quality, efficiency, and versatility of lighting sources used in most of the displays. The currently investigated phosphor SrZr2CaLa2O8:Eu3+ was prepared by a conventional solid‐state reaction method. It has been observed that the stoichiometric ratio of all precursors plays an important role in determining the characteristics of the final phosphor. From X‐ray diffraction (XRD) analysis, the phosphor was observed to have a hexagonal phase and a crystal size of ~28 nm. Scanning electron microscopy (SEM) observations revealed a cluster of rod‐like structures with an average diameter of ~0.2 μm. The excitation peak maximum observed at 280 nm is due to charge transfer between Eu3+‐O2− ions. The energy transitions 7F0 → 5L6 and 7F0 → 5D2 are responsible for the appearance of other excitation peaks at ultraviolet (UV) (395 nm), blue (~467 nm), green (~540 nm), orange (~590 nm), and red (~627 nm) attributed to 5D0 → 7FJ (J = 0–4) transitions of europium ion (Eu3+). The Commercial International de I'Eclairage (CIE) chromaticity coordinates were estimated to be (0.37, 0.0.33) and (0.67, 0.33) for the emissions corresponding to 395 and 590 nm, respectively. The characteristic emissions of Eu3+ ions allow this novel phosphor to be used to generate direct white light in light‐emitting diodes (LEDs), which is otherwise difficult to achieve in single‐component systems.

show abstract

“…38 The average fluorescence lifetime of all these curves can be calculated by:where I ( t ) represents the emission intensity of different samples at time t , and τ represents the lifetime. 46,47 Fig. 6b shows the calculated values of τ at different Sm 3+ ion doping concentrations.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of a Sm³⁺-doped YGa_1.5Al_1.5(BO₃)₄ phosphor via a mechanical activation-assisted solid-state reaction

et al. 2023

View full text Add to dashboard Cite

show abstract

A potential red-emitting phosphor Ca2YTaO6:Eu3+: Luminescence properties, thermal stability and applications for white LEDs

Cited by 39 publications

References 38 publications

Highly sensitive optical thermometer of Sm³⁺, Mn⁴⁺ activated LaGaO₃ phosphor for the regulated thermal behavior

Highly sensitive optical thermometer of Sm³⁺, Mn⁴⁺ activated LaGaO₃ phosphor for the regulated thermal behavior

Studies on a novel SrZr₂CaLa₂O₈:Eu³⁺ phosphor for lighting applications emitting direct white light

Synthesis of a Sm³⁺-doped YGa_1.5Al_1.5(BO₃)₄ phosphor via a mechanical activation-assisted solid-state reaction

Contact Info

Product

Resources

About

A potential red-emitting phosphor Ca2YTaO6:Eu3+: Luminescence properties, thermal stability and applications for white LEDs

Cited by 39 publications

References 38 publications

Highly sensitive optical thermometer of Sm3+, Mn4+ activated LaGaO3 phosphor for the regulated thermal behavior

Highly sensitive optical thermometer of Sm3+, Mn4+ activated LaGaO3 phosphor for the regulated thermal behavior

Studies on a novel SrZr2CaLa2O8:Eu3+ phosphor for lighting applications emitting direct white light

Synthesis of a Sm3+-doped YGa1.5Al1.5(BO3)4 phosphor via a mechanical activation-assisted solid-state reaction

Contact Info

Product

Resources

About

Highly sensitive optical thermometer of Sm³⁺, Mn⁴⁺ activated LaGaO₃ phosphor for the regulated thermal behavior

Highly sensitive optical thermometer of Sm³⁺, Mn⁴⁺ activated LaGaO₃ phosphor for the regulated thermal behavior

Studies on a novel SrZr₂CaLa₂O₈:Eu³⁺ phosphor for lighting applications emitting direct white light

Synthesis of a Sm³⁺-doped YGa_1.5Al_1.5(BO₃)₄ phosphor via a mechanical activation-assisted solid-state reaction