A promising route for developing yellow long persistent luminescence and mechanoluminescence in CaGa2O4:Pr3+,Li+

Wang, Yajie; Peng, Feng; Ding, Songsong; Tian, Songlu; Wang, Yuhua

doi:10.1039/d1qi00326g

Cited by 25 publications

(9 citation statements)

References 54 publications

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“…), which is also consistent with results of Wang et al [27] and the above Rietveld refinement results. Then, the high-resolution XPS spectra are conducted for analyzing the chemical environment, and Figure S13a, Supporting Information shows the Sr 3d 3/2 and 3d 5/2 binding energy due to spinorbit splitting of Sr 3d level.…”

Section: Wwwadvopticalmatdesupporting

confidence: 93%

Local Structure and Self‐Defect Evolution under Nonstoichiometric Effect Unlock Zero‐Thermal‐Quenching

Wang

2023

Advanced Optical Materials

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chip + yellow phosphors, (b) NUV LED chip + red-green-blue (RGB) phosphors. However, the former type features a low color rendering index (Ra) and residual rich blue light, which is not suitable to meet the increasingly prominent demand for human-centric health lighting. [2] NUVactivated w-LED shows a preponderance, for the acquisition of high-quality white light through the combination of different phosphors, meanwhile, the blue light can be minimized.In addition, during the working process, the Ohm effect caused by the current will unavoidably increase the temperature, then the emission intensity of phosphors will drop, and Stokes shift will drift, which is so-called thermal quenching. [3] This effect seriously drags down the overall luminescent efficiency and the total life of the devices, as well as the imbalance of white light. Therefore, the development of phosphors with high brightness and thermal stability is still a key challenge.Very recently, researchers have made positive efforts to explore low thermal quenching phosphors and delved novel strategies which can be summarized as follows: i) defect level regulation: as the defect levels make the supplement with emission center during high-temperature emission. [4] Kim et al. obtained a blue emitting zero-thermal quenching phosphor Na 3 Sc 2 (PO4) 3 :Eu 2+ via its polymorphism transition (α−β−γ) and their defects correspondingly. [5] Wu et al. explored an antithermal quenching red emitting NaZn(PO 3 ) 3 :Mn 2+ and discovered the trap compensation effect during the self-reduction process. [6] However, one must concern about the lack of certain common principles and the uncertainty of traps in different hosts. ii) Structural modulation, which begins from the structure itself, searching or enhancing the rigidness of crystal structure to reduce thermally activated phonons-assisted non-radiative process under high temperature. [7] For instance, this is discovered in some UCr 4 C 4 type structures (e.g., RbLi(Li 3 SiO 4 ) 2 :Eu 2+ , NaK 2 Li(Li 3 SiO 4 ) 4 :Eu 2+ , NaK 7 (Li 3 SiO 4 ) 8 :Eu 2+ et al.), however, this is limited in its poor chemical stability. [8] iii) Surface and interface engineering, which is constructed by making phosphors into a core-shell structure or making phosphors-in-glass for higher chemical and thermal stability. Although effective, such as Ca 3 SiO 4 Cl 2 :Eu 2+ @SiO 2 , RbLi(Li 3 SiO 4 ) 2 :Eu 2+ @ Al 2 O 3 @ODTMS, the complexity, and extensibility of the process still limit practical production. [9] Therefore, newly efficient

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Section: Wwwadvopticalmatdesupporting

confidence: 93%

Local Structure and Self‐Defect Evolution under Nonstoichiometric Effect Unlock Zero‐Thermal‐Quenching

Wang

2023

Advanced Optical Materials

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“…4,5 Applied in coatings, inks and glass ceramics at first, PersL materials are now being used in fields including emergency escape, defence and military, information encryption and light storage as research develops. [6][7][8] In the current research studies, among PersL materials, which mainly emit short wavelength visible light, SrAl 2 O 4 :Eu 2+ ,Dy 3+ (green, 424 h), 9 CaAl 2 O 4 :Eu 2+ ,Nd 3+ (blue, 419 h) 10 and Y 2 O 2 S:Eu 3+ , Mg 2+ ,Ti 4+ (orange-red, 45 h) 11 are more mature. These three commercial phosphors can cause damage to human eyes because most of them are cool-coloured phosphors.…”

Section: Introductionmentioning

confidence: 79%

Enhancing the luminescence performance of Ca_2−xSr_xBO₃Cl:Eu²⁺,Dy³⁺ by substitution of Sr²⁺ for Ca²⁺

et al. 2022

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“…According to the previous report and the schematic illustration in Fig. 1, 13,20 the 4f ground state electrons of Pr 3+ will be excited to the empty 5d orbit near the CB under UV light irradiation. Most of the electrons will produce the characteristic transition of Pr 3+ .…”

Section: Resultsmentioning

confidence: 81%

Achieving mechano-upconversion-downshifting-afterglow multimodal luminescence in Pr³⁺/Er³⁺ coactivated Ba₂Ga₂GeO₇ for multidimensional anticounterfeiting

Pei

Liu

et al. 2022

J. Mater. Chem. C

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A promising route for developing yellow long persistent luminescence and mechanoluminescence in CaGa₂O₄:Pr³⁺,Li⁺

Abstract: In this study, we identified a novel yellow long persistent luminescent phosphor of Pr3+, Li+-doped CaGa2O4 (CGO) in terms of its crystal structure, photoluminescence (PL), long persistent luminescence (LPL), thermoluminescence...

Cited by 25 publications

References 54 publications

Local Structure and Self‐Defect Evolution under Nonstoichiometric Effect Unlock Zero‐Thermal‐Quenching

Local Structure and Self‐Defect Evolution under Nonstoichiometric Effect Unlock Zero‐Thermal‐Quenching

Enhancing the luminescence performance of Ca_2−xSr_xBO₃Cl:Eu²⁺,Dy³⁺ by substitution of Sr²⁺ for Ca²⁺

Achieving mechano-upconversion-downshifting-afterglow multimodal luminescence in Pr³⁺/Er³⁺ coactivated Ba₂Ga₂GeO₇ for multidimensional anticounterfeiting

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A promising route for developing yellow long persistent luminescence and mechanoluminescence in CaGa2O4:Pr3+,Li+

Abstract: In this study, we identified a novel yellow long persistent luminescent phosphor of Pr3+, Li+-doped CaGa2O4 (CGO) in terms of its crystal structure, photoluminescence (PL), long persistent luminescence (LPL), thermoluminescence...

Cited by 25 publications

References 54 publications

Local Structure and Self‐Defect Evolution under Nonstoichiometric Effect Unlock Zero‐Thermal‐Quenching

Local Structure and Self‐Defect Evolution under Nonstoichiometric Effect Unlock Zero‐Thermal‐Quenching

Enhancing the luminescence performance of Ca2−xSrxBO3Cl:Eu2+,Dy3+ by substitution of Sr2+ for Ca2+

Achieving mechano-upconversion-downshifting-afterglow multimodal luminescence in Pr3+/Er3+ coactivated Ba2Ga2GeO7 for multidimensional anticounterfeiting

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A promising route for developing yellow long persistent luminescence and mechanoluminescence in CaGa₂O₄:Pr³⁺,Li⁺

Enhancing the luminescence performance of Ca_2−xSr_xBO₃Cl:Eu²⁺,Dy³⁺ by substitution of Sr²⁺ for Ca²⁺

Achieving mechano-upconversion-downshifting-afterglow multimodal luminescence in Pr³⁺/Er³⁺ coactivated Ba₂Ga₂GeO₇ for multidimensional anticounterfeiting