Luminescence properties of novel dual-emission (UV/red) long afterglow phosphor LiYGeO4: Eu3+

Dai, Tiansong; Ju, Guifang; Lv, Yang; Jin, Yahong; Wu, Haoyi; Hu, Yihua

doi:10.1016/j.jlumin.2021.118193

Cited by 22 publications

(9 citation statements)

References 47 publications

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“…The CIE chromaticity coordinates (x, y) shift from the blue region to the green region with the temperature increasing, indicating that the electrons in the deep traps prefer to be trapped by the shallow traps and fall into to 5 D 4 level of Tb 3+ (process 7 or 8). The concentration quenching of PerL of Tb 3+ ions was attributed to electron migration among traps via tunneling [17,26]. With the Tb 3+ concentration increasing, the distance (the width of the potential barrier) between the vacancy trap and the nearby charged trap become shorter compared with at low concentrations.…”

Section: Resultsmentioning

confidence: 99%

“…In addition to UVA PerL, Wang et al [16] observed blue PersL in the NaLuGeO 4 :Bi 3+ ,Eu 3+ material peaking at 400 nm, but half of its PerL emission was located in the UVA region. Recently, Hu et al [17] reported red PerL peaking at 611 nm in LiYGeO 4 :Eu 3+ phosphor. Although some promising XeMeGeO 4 -based persistent materials have been reported, the design and development of excellent germanates-based PerL materials with full spectral emissions remain challenging due to the lack of flexible blue and green PerL.…”

Section: Introductionmentioning

confidence: 99%

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Color-tunable photoluminescence and persistent luminescence in a single LiYGeO₄:Tb³⁺ phosphor

Wang

Liu

et al. 2022

Mater. Res. Express

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Persistent luminescence (PerL) phosphors have been widely applied in many advanced applications in the field of emergency lighting, safety signage, and ornaments. Recently, the PerL phosphors based on germanates have attracted great attention owing to their excellent PerL performance. However, the design and development of excellent germanates-based PerL materials with full spectral emissions remain challenging due to the lack of color-tunable PerL, especially in the blue and green regions (400-600 nm). Herein, we develop a new type of Tb3+-activated LiYGeO4 PerL phosphor with real-time adjusting the photoluminescence (PL) and PerL color, which can be effectively excited by a 254 UV light. Both blue and green PerL are realized simultaneously in a single phosphor. When LiYGeO4:Tb3+ doped with lower concentrations of Tb3+ ions, phosphors emit blue PL and PerL. With increasing Tb3+ concentration, the PL and PerL colors of LiYGeO4:Tb3+ PerL phosphor are gradually regulated from blue to green. Besides, LiYGeO4:Tb3+ exhibits temperature-dependent luminescence property, whose PL and PerL colors can also be successively widely tuned by various temperature. This stable and tunable color in real-time PL and PerL property promote the as-designed LiYGeO4:Tb3+ phosphor to have potential applications in advanced anti-counterfeiting and display devices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Color-tunable photoluminescence and persistent luminescence in a single LiYGeO₄:Tb³⁺ phosphor

Wang

Liu

et al. 2022

Mater. Res. Express

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“…Due to 5 D0→ 7 FJ (J=0, 1,2,3,4) transitions, the Eu 3+ ion has been identified as one of the best red activators in the phosphors. Examples of this include Eu 3+ doped Ca12Al14O32F2 [5], LaBMoO6 [6], Sr2LiScB4O10 [7], Bi4O3(BO3)(PO4) [8], LiYGeO4 [9], Sr5(PO4)3F [10],…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Photoluminescence characterization of Sr3La(AlO)3(BO3)4:Eu3+,Sm3+ Phosphor for W-LED

Yerojwar

Kokode

Nandanwar

et al. 2023

Phys. Chem. Solid St.

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A Red emitting with high efficiency Eu3+ doped Sr3La(AlO)3(BO3)4 and Sm3+ doped Sr3La(AlO)3(BO3)4 phosphors has been synthesized by combustion method, meanwhile, the photoluminescence properties of samples are investigated in detail. Morphology by SEM and chromaticity by CIE was studied. The results show that the excitation extends from 340 nm to 420 nm, with the highest excitation (394 nm and 406 nm) being in the violet area for Eu3+ and Sm3+ doping, indicating that the phosphor can correlate well with LED chips. Under violet light excitation of 394nm the phosphor Eu3+ doped Sr3La(AlO)3(BO3)4 and of 406 nm the phosphor Sm3+ doped Sr3La(AlO)3(BO3)4 can emit strong red light showing main emission peaks located at 617 nm and 602 nm are observed respectively. The PL properties implies the excellent stability of the phosphor. These results imply that the importance red phosphors Sr3La(AlO)3(BO3)4:Eu3+ and Sr3La(AlO)3(BO3)4:Sm3+ in W-LEDs under NUV excitation.

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“…As one of the most special sensitizers, the luminescence of Eu 3+ originates from the f–f forbidden transition and is less sensitive to the surrounding environment. It offers strong red emission under efficient blue excitation, which has great potential in optimizing the luminescence performance of activated Cr 4+ ions. − In this paper, we study the olivine structure, photoluminescence characteristics, and energy-transfer mechanism of CGO: x Eu 3+ , y Cr 4+ phosphors. The luminescence intensity of Cr 4+ is enhanced by energy transfer from Eu 3+ to Cr 4+ , and the mechanism is elucidated based on photoluminescence excitation spectra (PLE), photoluminescence spectra (PL), and decay lifetime curves.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Luminescence of Long-Wavelength Broadband Near-Infrared Germanate Phosphors

Liu

Gao

et al. 2023

ACS Omega

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Long-wavelength broadband near-infrared (NIR) phosphors have attracted considerable interest in the fields of medical cosmetology and organic detection because of their special emission band. Herein, Ca2GeO4(CGO): Cr4+ NIR phosphor, presenting a broadband emission with longer wavelength ranging from 1100 to 1600 nm, has been synthesized. Further, the luminescence intensity and quantum efficiency of Cr4+ could be obviously improved via the energy transfer from Eu3+ to Cr4+. The energy transfer is dominated by the dipole–dipole mechanism, which can be inferred from the spectra and the decay curves. Furthermore, in order to evaluate the potential application, an NIR phosphor-converted light-emitting diode (pc-LED) based on blue chip has been prepared. Consequently, CGO: Eu3+, Cr4+ exhibits proper output power and wider half-width than the NIR LED chip, indicating its great prospect for long-wavelength NIR pc-LED applications.

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Luminescence properties of novel dual-emission (UV/red) long afterglow phosphor LiYGeO4: Eu3+

Cited by 22 publications

References 47 publications

Color-tunable photoluminescence and persistent luminescence in a single LiYGeO₄:Tb³⁺ phosphor

Color-tunable photoluminescence and persistent luminescence in a single LiYGeO₄:Tb³⁺ phosphor

Synthesis and Photoluminescence characterization of Sr3La(AlO)3(BO3)4:Eu3+,Sm3+ Phosphor for W-LED

Enhanced Luminescence of Long-Wavelength Broadband Near-Infrared Germanate Phosphors

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Luminescence properties of novel dual-emission (UV/red) long afterglow phosphor LiYGeO4: Eu3+

Cited by 22 publications

References 47 publications

Color-tunable photoluminescence and persistent luminescence in a single LiYGeO4:Tb3+ phosphor

Color-tunable photoluminescence and persistent luminescence in a single LiYGeO4:Tb3+ phosphor

Synthesis and Photoluminescence characterization of Sr3La(AlO)3(BO3)4:Eu3+,Sm3+ Phosphor for W-LED

Enhanced Luminescence of Long-Wavelength Broadband Near-Infrared Germanate Phosphors

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Color-tunable photoluminescence and persistent luminescence in a single LiYGeO₄:Tb³⁺ phosphor

Color-tunable photoluminescence and persistent luminescence in a single LiYGeO₄:Tb³⁺ phosphor