A crystal defect led zero thermal quenching β-NaYF4 : Eu3+,Dy3+ red emitting phosphor

Ling, Shaokun; Chen, Chang; Meng, Kai; Yan, Yifeng; Ming, Junyun; Liao, Sen; Huang, Yingheng

doi:10.1039/d2ra05674g

Cited by 5 publications

(1 citation statement)

References 53 publications

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“…The Eu 3+ and Yb 3+ are incorporated into the matrix. In our previous studies, − we found that the down-conversion luminescent ions: Sm 3+ , Dy 3+ , and Tb 3+ lead to a decrease of thermal luminescent stability of Eu 3+ , despite the existence of an energy transfer effect. Therefore, we tried to utilize upconversion ion Yb 3+ to improve the ZTQ property of Eu 3+ in this study.…”

Section: Introductionmentioning

confidence: 85%

Design of Eu³⁺-Doped Fluoride Phosphor with Zero Thermal Quenching Property Based on Density Functional Theory

Ling,

Wang,

Qin

et al. 2024

Inorg. Chem.

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Although being applied in various fields, white light emitting diodes (WLEDs) still have drawbacks that urgently need to be conquered: the luminescent intensity of commercial phosphors sharply decreases at working temperature. In this study, we calculated the forming energy of defects and confirmed that the V Na defect state can stably exist in β-NaGdF 4 , by density functional theory (DFT) calculation. Furthermore, we predicted that the V Na vacancies would provide a zero thermal quenching (ZTQ) property for the β-NaGdF 4based red-light phosphor. Then, a series of β-NaGdF 4 :xEu 3+ and β-NaGdF 4 :0.25Eu 3+ ,yYb 3+ red-light phosphors were synthesized by the hydrothermal method. We found that β-NaGdF 4 :0.25Eu 3+ and β-NaGdF 4 :0.25Eu 3+ ,0.005Yb 3+ phosphors possess ZTQ properties at a temperature range between 303−483 K and 303−523 K, respectively. The thermoluminescence (TL) spectra were employed to calculate the depth and density of the V Na vacancies in β-NaGdF 4 :0.25Eu 3+ and β-NaGdF 4 :0.25Eu 3+ ,0.005Yb 3+ . Combining the DFT calculation with characterization results of TL spectra, it is concluded that electrons stored in V Na vacancies are excited to the exited state of Eu 3+ to compensate for the loss of Eu 3+ luminescent intensity. This will lead to an increase of luminescent intensity at high temperatures and facilitate the samples to improve ZTQ properties. WLEDs were obtained with CRI = 83.0, 81.6 and CCT = 5393, 5149 K, respectively, when phosphors of β-NaGdF 4 :0.25Eu 3+ and β-NaGdF 4 :0.25Eu 3+ ,0.005Yb 3+ were utilized as the red-light source. These results indicate that these two phosphors may become reliable red-light sources with high antithermal quenching properties for WLEDs.

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Section: Introductionmentioning

confidence: 85%

Design of Eu³⁺-Doped Fluoride Phosphor with Zero Thermal Quenching Property Based on Density Functional Theory

Ling,

Wang,

Qin

et al. 2024

Inorg. Chem.

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Concentration-induced morphological changes of biocompatible La3+, Yb3+, Er3+ tri-doped NaYF4 compounds

Namagal

Jaya²

2023

Appl. Phys. A

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Dy3+-doped niobate phosphor based on charge transfer band red-shift effect: Luminescence thermal stability and temperature sensing performance

Song,

Li,

Chen

et al. 2024

Journal of Alloys and Compounds

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A crystal defect led zero thermal quenching β-NaYF₄ : Eu³⁺,Dy³⁺ red emitting phosphor

Abstract: VY vacancies make a predominant contribution to the zero thermal quenching property of β-NaYF4 : 0.065Eu3+,0.003Dy3+.

Cited by 5 publications

References 53 publications

Design of Eu³⁺-Doped Fluoride Phosphor with Zero Thermal Quenching Property Based on Density Functional Theory

Design of Eu³⁺-Doped Fluoride Phosphor with Zero Thermal Quenching Property Based on Density Functional Theory

Concentration-induced morphological changes of biocompatible La3+, Yb3+, Er3+ tri-doped NaYF4 compounds

Dy3+-doped niobate phosphor based on charge transfer band red-shift effect: Luminescence thermal stability and temperature sensing performance

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A crystal defect led zero thermal quenching β-NaYF4 : Eu3+,Dy3+ red emitting phosphor

Abstract: VY vacancies make a predominant contribution to the zero thermal quenching property of β-NaYF4 : 0.065Eu3+,0.003Dy3+.

Cited by 5 publications

References 53 publications

Design of Eu3+-Doped Fluoride Phosphor with Zero Thermal Quenching Property Based on Density Functional Theory

Design of Eu3+-Doped Fluoride Phosphor with Zero Thermal Quenching Property Based on Density Functional Theory

Concentration-induced morphological changes of biocompatible La3+, Yb3+, Er3+ tri-doped NaYF4 compounds

Dy3+-doped niobate phosphor based on charge transfer band red-shift effect: Luminescence thermal stability and temperature sensing performance

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A crystal defect led zero thermal quenching β-NaYF₄ : Eu³⁺,Dy³⁺ red emitting phosphor

Design of Eu³⁺-Doped Fluoride Phosphor with Zero Thermal Quenching Property Based on Density Functional Theory

Design of Eu³⁺-Doped Fluoride Phosphor with Zero Thermal Quenching Property Based on Density Functional Theory