High efficient Eu3+-activated Ca(La, Gd)MgSbO6 double perovskite phosphors: Thermal stability improvement by composition modulating

Fan, Minghan; Chen, Qinghan; Wang, Yuwang; Wang, Xu; Xue, Qiankun; Wang, Haiming; Liu, Quan; Wei, Bo

doi:10.1016/j.jlumin.2019.116674

Cited by 11 publications

(2 citation statements)

References 44 publications

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“…Currently, CaLaMgTaO 6 and CaLaMgSbO 6 are an excellent luminescent host materials. Due to their better chemical stability, strong and wide charge-transfer band (CTB) in the NUV-blue region has seen some studies, − but the study of its thermal stability has been limited by severe thermal quenching and no breakthrough has been made. For example, the CaLaMgTaO 6 :Bi 3+ system reported presents a fast quenching trend with increasing temperature, , and the equivalent BaLaCa 1– x Mg x SbO 6 :Mn 4+ system shows basically complete quenching at 473 K .…”

Section: Introductionmentioning

confidence: 99%

Adjustment of Bi³⁺ Luminescence and Thermal Quenching Properties by B′-Site Ion Substitution Strategy in Double Perovskite CaLaMgSb/TaO₆:Bi³⁺ Phosphor

et al. 2023

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Thermal quenching has always been one of the most difficult issues in creating high-quality phosphor conversion light-emitting diodes (pc-LED), and a family of strategies are urgently needed to improve the luminescence performance of phosphors at high temperatures. In this contribution, a novel B′-site substitution CaLaMgSb x Ta1–x O6:Bi3+ phosphor was constructed using an ion substitution strategy in the matrix with a green activator Bi3+ and a novel double perovskite material. When Sb5+ replaces Ta5+, a surprising increase in luminescence intensity occurs and the thermal quenching properties are greatly improved. The shift of the Raman characteristic peak to a smaller wavenumber and the reduction of the Bi–O bond length confirm that the crystal field environment around Bi3+ changes, which has a substantial effect on the crystal field splitting and nepheline effect of Bi3+ ions, affecting the crystal field splitting energy (D q). This results in a corresponding increase of the band gap and the thermal quenching activation energy (ΔE) of the activator Bi3+. From the perspective of D q, the intrinsic relationships among the activator ion band gap, bond length, and Raman characteristic peak changes were analyzed, and a mechanism for regulating luminescence thermal quenching properties was constructed, which provides an effective strategy for improving the promising new materials such as double perovskite.

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Section: Introductionmentioning

confidence: 99%

Adjustment of Bi³⁺ Luminescence and Thermal Quenching Properties by B′-Site Ion Substitution Strategy in Double Perovskite CaLaMgSb/TaO₆:Bi³⁺ Phosphor

et al. 2023

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“…In addition, the host lattice can also affect the luminescence behaviors of the prepared phosphors by influencing the local environment of Eu 3+ -occupied sites. Inspired by such information, the optical properties of some phosphors have been improved via the composition modulation of the host lattice, such as BaLaMg(Sb,Nb)O 6 :Eu 3+ , 23 Ca(La,Gd)MgSbO 6 :Eu 3+ , 24 and Ca 1+ x Sr 2− x Al 2 O 6 :Eu 3+ phosphors. 25 This route could comprehensively compare the luminous properties in similar frameworks after composition modulations.…”

Section: Introductionmentioning

confidence: 99%

Modulating A site compositions of europium(iii)-doped double-perovskite niobate phosphors

Hua

et al. 2022

Inorg. Chem. Front.

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Photoluminescence Color Prediction for Eu³⁺‐Doped Perovskite Red Phosphors Using Machine Learning

Otsuka,

Oka,

Karasuyama

et al. 2023

Physica Rapid Research Ltrs

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Currently, data‐driven approaches for exploring novel materials are garnering significant attention with the expectation of accelerating material development cycles and understanding materials from various aspects. This short article presents a supervised prediction model for the emission intensity ratio of 5D0–7F2 and 5D0–7F1 transition of Eu3+ ions, called an “asymmetry ratio”, which determines the color purity of the red region of Eu3+ photoluminescence in perovskite phosphors. The model is developed using a dataset of 296 samples and 203 descriptors for Eu3+‐doped perovskite. The accuracy of the prediction model trained by the dataset is statistically evaluated, which validates its sufficiently high prediction performance. Furthermore, the prediction model's performance is properly assessed by synthesizing a Eu3+‐doped NaLaInNbO6 compound, which is unknown as a red phosphor, and by comparing the experimental asymmetry ratio for this compound with that predicted by the predictor, which exhibits satisfactory agreement.

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High efficient Eu3+-activated Ca(La, Gd)MgSbO6 double perovskite phosphors: Thermal stability improvement by composition modulating

Cited by 11 publications

References 44 publications

Adjustment of Bi³⁺ Luminescence and Thermal Quenching Properties by B′-Site Ion Substitution Strategy in Double Perovskite CaLaMgSb/TaO₆:Bi³⁺ Phosphor

Adjustment of Bi³⁺ Luminescence and Thermal Quenching Properties by B′-Site Ion Substitution Strategy in Double Perovskite CaLaMgSb/TaO₆:Bi³⁺ Phosphor

Modulating A site compositions of europium(iii)-doped double-perovskite niobate phosphors

Photoluminescence Color Prediction for Eu³⁺‐Doped Perovskite Red Phosphors Using Machine Learning

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High efficient Eu3+-activated Ca(La, Gd)MgSbO6 double perovskite phosphors: Thermal stability improvement by composition modulating

Cited by 11 publications

References 44 publications

Adjustment of Bi3+ Luminescence and Thermal Quenching Properties by B′-Site Ion Substitution Strategy in Double Perovskite CaLaMgSb/TaO6:Bi3+ Phosphor

Adjustment of Bi3+ Luminescence and Thermal Quenching Properties by B′-Site Ion Substitution Strategy in Double Perovskite CaLaMgSb/TaO6:Bi3+ Phosphor

Modulating A site compositions of europium(iii)-doped double-perovskite niobate phosphors

Photoluminescence Color Prediction for Eu3+‐Doped Perovskite Red Phosphors Using Machine Learning

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Product

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Adjustment of Bi³⁺ Luminescence and Thermal Quenching Properties by B′-Site Ion Substitution Strategy in Double Perovskite CaLaMgSb/TaO₆:Bi³⁺ Phosphor

Adjustment of Bi³⁺ Luminescence and Thermal Quenching Properties by B′-Site Ion Substitution Strategy in Double Perovskite CaLaMgSb/TaO₆:Bi³⁺ Phosphor

Photoluminescence Color Prediction for Eu³⁺‐Doped Perovskite Red Phosphors Using Machine Learning