Luminescence, Concentration Quenching and Thermal Stability of Ca9Al(PO4)7: Eu2+

Due to the advantages of good physicochemical properties, thermal stability, and optical properties, double perovskite compounds have received extensive attention. On this basis, a new type of red phosphor, Ca2YNbO6:xEu3+, was synthesized using a high‐temperature solid‐phase method. Its phase purity, morphology, elemental composition, absorption spectrum, photoluminescence, thermal stability, and Commission Internationale de l'éclairage (CIE) chromaticity coordinates were thoroughly investigated. The results display that there is no impurity phase in the samples and the convergence factor Rwp = 14.2%; the microscopic particles are uniform and full, and the distribution of each element is uniform. The energy band gap ΔE is between 3.71 eV and 3.65 eV. The luminescence intensity is the best when the doped Eu3+ concentration x reaches 0.4, and emits 612 nm red light (5D0→7F2) under 465 nm excitation, and the concentration quenching is attributed to a d–d interaction. The luminescence intensity at 425 K was still 75% of the room temperature luminescence intensity, which indicates that the thermal stability is extremely superior. The CIE chromaticity coordinates (0.6534, 0.3455) of the Ca2YNbO6:0.4Eu3+ phosphors are very close to National Television Standards Committee (0.670, 0.330), and the samples have low correlated colour temperature (2656 K) and high colour purity (99.90%). All findings suggest that Ca2YNbO6:Eu3+ can serve as a substitute for red phosphor in WLEDs.

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A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

Shi

Cui

Gong

et al. 2022

Luminescence

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Ca9Al(PO4)7:Tb3+—crystal configuration and judd–ofelt modelling of green emanating nanophosphor

Jakhar

2022

Appl. Phys. A

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Luminescence properties of NaLa0.7(MoO4)2:R3+(R3+=Eu3+,Tb3+) phosphor and energy transfer

Dong-ni,

Xie-jing,

Xiao-long

2024

Appl. Phys. A

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Luminescence, Concentration Quenching and Thermal Stability of Ca₉Al(PO₄)₇: Eu²⁺

Cited by 6 publications

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A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

Ca9Al(PO4)7:Tb3+—crystal configuration and judd–ofelt modelling of green emanating nanophosphor

Luminescence properties of NaLa0.7(MoO4)2:R3+(R3+=Eu3+,Tb3+) phosphor and energy transfer

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Luminescence, Concentration Quenching and Thermal Stability of Ca9Al(PO4)7: Eu2+

Cited by 6 publications

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A novel red phosphor Ca2YNbO6:Eu3+ for WLEDs

A novel red phosphor Ca2YNbO6:Eu3+ for WLEDs

Ca9Al(PO4)7:Tb3+—crystal configuration and judd–ofelt modelling of green emanating nanophosphor

Luminescence properties of NaLa0.7(MoO4)2:R3+(R3+=Eu3+,Tb3+) phosphor and energy transfer

Contact Info

Product

Resources

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Luminescence, Concentration Quenching and Thermal Stability of Ca₉Al(PO₄)₇: Eu²⁺

A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs

A novel red phosphor Ca₂YNbO₆:Eu³⁺ for WLEDs