Anti-Defect engineering toward high luminescent efficiency in whitlockite phosphors

Pan, Xin; Mei, Lefu; Zhuang, Yixi; Seto, Takatoshi; Wang, Yuhua; Plyaskin, Mikhail E.; Xi, Wei; Li, Chao; Guo, Qingfeng; Liao, Libing

doi:10.1016/j.cej.2022.134652

Cited by 28 publications

(23 citation statements)

References 63 publications

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“…A similar difference in Debye temperatures is observed when comparing Ca 3 (PO 4 ) 2 : 0.07Ce 3+ ( θ D = 541 K) to Ca 1.5 Sr 1.5 (PO 4 ) 2 : 0.07Ce 3+ ( θ D = 730 K). 60…”

Section: Resultsmentioning

confidence: 99%

The pressure and temperature evolution of the Ca₃V₂O₈ crystal structure using powder X-ray diffraction

et al. 2023

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“…A similar difference in Debye temperatures is observed when comparing Ca 3 (PO 4 ) 2 : 0.07Ce 3+ ( θ D = 541 K) to Ca 1.5 Sr 1.5 (PO 4 ) 2 : 0.07Ce 3+ ( θ D = 730 K). 60…”

Section: Resultsmentioning

confidence: 99%

The pressure and temperature evolution of the Ca₃V₂O₈ crystal structure using powder X-ray diffraction

et al. 2023

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“…Therefore, the reason for the quenching was locked in the multipole-multipole interaction factors. The types of multipolemultipole interactions could be further analyzed using Dexter's theory [19]:…”

Section: Photoluminescence Properties Analysismentioning

confidence: 99%

“…They can improve the photoluminescence (PL) intensity, thermal stability and quantum yield of phosphors by adding alkali metal to repair the vacancy defect in the quenching centre of phosphors [19].…”

Section: Introductionmentioning

confidence: 99%

Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination

Li,

Ye,

Cui

et al. 2023

Luminescence

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A series of Mn4+‐doped and Mn4+,K+‐co‐doped Ba2LaTaO6 (BLT) double‐perovskite phosphors was synthesized using a high‐temperature solid‐state reaction. The phase purity and luminescence properties were also studied. The optimum doping concentration of Mn4+ and K+ was obtained by investigating the photoluminescence excitation spectra and photoluminescence emission spectra. The comparison of BLT:Mn4+ phosphors with and without K+ ions shows that the photoluminescence intensity of K+‐doped phosphors was greatly enhanced. This is because there was a charge difference when Mn4+ ions were doped with Ta5+ ions in BLT. Mn4+–K+ ion pairs were formed after doping K+ ions, which hinders the nonradiative energy transfer between Mn4+ ions. Therefore, the luminescence intensity, quantum yield, and thermal stability of phosphors were enhanced. The electroluminescence spectra of BLT:Mn4+ and BLT:Mn4+,K+ were measured. The spectra showed that the light emitted from the phosphors corresponded well with chlorophyll a and phytochrome PR. The results show that the BLT:Mn4+,K+ phosphors had good luminescence properties and application prospects and are ideal materials for plant‐illuminated red phosphors.

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“…20,21 Pan et al used an antidefect engineering strategy by introducing alkali metals to remove vacancy defects to develop high-efficiency phosphors. 22 Han et al reported defect-induced self-activated Ba 3 BPO 7 phosphor luminescence properties and a possible mechanism. 23 Li et al also emphasized that interstitial oxygen and oxygen vacancies affect the degree of self-reduction.…”

Section: Introductionmentioning

confidence: 99%

“…In particular, the special rigid structure facilitates self-reduction and allows the coexistence of heterovalent Eu 2+/3+ , e.g., Lu 2 MgA l4 SiO 12 :Eu 2+/3+ , CaBPO 5 :Eu 2+/3+ , Ba 5 SiO 4 C l6 :Eu 2+/3+ , Ca 12 Al 14 O 32 F 2 :Eu 2+/3+ , and MAl 2 Si 2 O 8 :Eu 2+/3+ . Numerous authors have suggested that the host alkaline vacancies are the primary electron source for the self-reduction of Eu 3+ . , Pan et al used an antidefect engineering strategy by introducing alkali metals to remove vacancy defects to develop high-efficiency phosphors . Han et al reported defect-induced self-activated Ba 3 BPO 7 phosphor luminescence properties and a possible mechanism .…”

Section: Introductionmentioning

confidence: 99%

Vacancy-Enhanced Self-Reduction of Eu in Pyrophosphate Phosphor

Wang,

Su,

Mei

et al. 2023

Inorg. Chem.

Self Cite

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The self-reduction mechanism in pyrophosphate phosphors is currently explained through nonequivalent substitution for charge compensation. Nevertheless, the impact of oxygen vacancies on the self-reduction enhancement requires further investigation. Herein, heterovalent Ba1–x Zn1–y P2O7:xEu2+/3+, yMg phosphors with rigid structures were prepared through conventional solid-phase technology in air. The cation substitution strategy leads to different chemistry electronegativity and adjustable crystal field environments and creates vacancy defects. Crystal structure and component analysis indicate the gradual phase segregation change from BaZnP2O7 to BaMgP2O7 with increasing Mg2+ content. The CIE coordinates that are tuned from (0.514, 0.334) to (0.326, 0.152) and realize color-tunable emission from red-orange to blue-violet can be used as multicolor functional materials. Besides, the phosphor demonstrates its maximum S a of 0.4725% K–1 (498 K) and S r of 1.376% K–1 (423 K). These results demonstrate that the phosphors have the potential for contactless optical temperature measurement and anticounterfeiting. This work not only investigates the self-reduction of the Eu3+ → Eu2+ phenomenon but also provides a supplementary explanation and data support to complete the effect of the oxygen vacancy on self-reduction.

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Anti-Defect engineering toward high luminescent efficiency in whitlockite phosphors

Cited by 28 publications

References 63 publications

The pressure and temperature evolution of the Ca₃V₂O₈ crystal structure using powder X-ray diffraction

The pressure and temperature evolution of the Ca₃V₂O₈ crystal structure using powder X-ray diffraction

Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination

Vacancy-Enhanced Self-Reduction of Eu in Pyrophosphate Phosphor

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Anti-Defect engineering toward high luminescent efficiency in whitlockite phosphors

Cited by 28 publications

References 63 publications

The pressure and temperature evolution of the Ca3V2O8 crystal structure using powder X-ray diffraction

The pressure and temperature evolution of the Ca3V2O8 crystal structure using powder X-ray diffraction

Phosphors Ba2LaTaO6:Mn4+ and its alkali metal charge compensation for plant growth illumination

Vacancy-Enhanced Self-Reduction of Eu in Pyrophosphate Phosphor

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The pressure and temperature evolution of the Ca₃V₂O₈ crystal structure using powder X-ray diffraction

The pressure and temperature evolution of the Ca₃V₂O₈ crystal structure using powder X-ray diffraction

Phosphors Ba₂LaTaO₆:Mn⁴⁺ and its alkali metal charge compensation for plant growth illumination