Deep-red-emitting SrLa2Sc2O7:Mn4+ phosphor: Synthesis and photoluminescence properties

Cao, Renping; Ouyang, Xun; Jiao, Yuming; Wang, Xuantian; Hu, Qianglin; Chen, Ting; Liao, Chenxing; Li, Yajie

doi:10.1016/j.jallcom.2019.04.220

Cited by 40 publications

(11 citation statements)

References 43 publications

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“…Evidently, the emission intensity of SISO:0.006Mn 4+ phosphor remains approximately 50% at 410 K compared with that of RM (Figure 11C). As comparison, the value was also higher than that of Li 6 SrLa 2 Sb 2 O 12 :Mn 4+ ( T 0.5 = 370 K) 43 and SrLa 2 Sc 2 O 7 :Mn 4+ ( T 0.5 < 410 K) 44 . As shown in Figures 11(D) and (E), after cooling to RM, the PL intensity can restore to about 99%.…”

Section: Resultsmentioning

confidence: 75%

“…As comparison, the value was also higher than that of Li 6 SrLa 2 Sb 2 O 12 :Mn 4+ (T 0.5 = 370 K) 43 and SrLa 2 Sc 2 O 7 :Mn 4+ (T 0.5 < 410 K). 44 As shown in Figures 11(D) and (E), after cooling to RM, the PL intensity can restore to about 99%. Besides, the emission intensity of this phosphor is repeatable after four thermal-cold cycles.…”

Section: Optical Properties Of Siso:mn 4+ Phosphorsmentioning

confidence: 77%

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An efficient far‐red emission Sr₂InSbO₆:Mn⁴⁺, M (M = Li⁺, Na⁺, and K⁺) phosphors for plant cultivation LEDs

et al. 2021

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High‐efficiency and far‐red light phosphors based on Mn4+‐doped inorganic luminescence materials are beneficial to plant cultivation. However, Mn4+‐doped oxide phosphors have a common problem of low quantum efficiency. Alkali metal ion codoping can effectively improve the luminescence properties of Mn4+‐activated oxide phosphors. Herein, a series of Sr2InSbO6:Mn4+, M (SISO:Mn4+, M) (M = Li+, Na+, and K+) far‐red‐emitting phosphors codoped alkali metal ions were first synthesized. Density functional theory calculation indicated that SISO is a kind of indirect bandgap material with a bandgap of ∼1.60 eV. The SISO:Mn4+ samples showed a far‐red light at 698 nm upon 365 nm, which perfectly matched the absorption spectrum of the far‐red‐phytochrome (Pfr) of plants. The doping concentration of the SISO:Mn4+ samples was optimized to be 0.006 mol. The concentration quenching mechanism was defined as dipole–dipole interaction by combining the Dexter theory and the Inokuti–Hirayama model. Optimizing the sintering temperature and codoped with alkali metal ions (Li+, Na+, and K+) could improve the luminescent intensity of SISO:Mn4+. The optimum sintering temperature was 1300°C. The internal quantum efficiencies of SISO:0.006Mn4+ and SISO:0.006Mn4+, 0.006Li+ phosphors are 22.67% and 60.56%, respectively. SISO:Mn4+, Li+ phosphors‐based plant growth light‐emitting diodes (LEDs) demonstrate excellent optical stability and long lifetime. Thus, these phosphors are promising candidates for plant cultivation LEDs.

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Section: Resultsmentioning

confidence: 75%

Section: Optical Properties Of Siso:mn 4+ Phosphorsmentioning

confidence: 77%

An efficient far‐red emission Sr₂InSbO₆:Mn⁴⁺, M (M = Li⁺, Na⁺, and K⁺) phosphors for plant cultivation LEDs

et al. 2021

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“…The photoluminescence decay curves can be well fitted by the double exponential function as following Eq. ( 6) [32]:…”

Section: Resultsmentioning

confidence: 99%

Enhanced luminescence of Mn4+-activated CaAl12O19 red phosphors by synergetic manipulation of the flux effect and charge compensation for warm WLEDs application

Gao

et al. 2021

J Mater Sci: Mater Electron

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Mn 4? -activated phosphors have become a hotspot in the development of inorganic red phosphors due to the fascinating photoluminescent properties. Herein, the synergetic manipulation of the flux effect and charge compensation was employed to improve the performance of Mn 4? -activated CaAl 12 O 19 red phosphors. The crystallinity was improved by appropriate Zn 2? -doping, while nonradiative transition between Mn 4? ions is reduced by charge compensation of the formation of Mn 4? -Mg 2? pairs with Mg 2? dopants. Thus, the emission of Mn 4? -activated CaAl 12 O 19 red phosphors has been remarkably enhanced. The low probability of nonradiative transition between Mn 4? ions was demonstrated by the thermal stability analysis. To depict the luminescent process, the crystalfield strength (D q ), and Racah parameters (B and C) were calculated to determine the sequence of the energy levels. Meanwhile, the warm WLEDs with high CRI and low CCT were obtained using the prepared phosphors as red-emitting composition. Our results clearly suggested that the synergetic strategy by combining the flux effect and charge compensation is an effective method to enhance the luminescence of CaAl 12 O 19 :Mn 4? , and CaAl 12 O 19 :Mn 4? /Zn 2? / Mg 2? red-emitting phosphors, which have potential application value in warm WLEDs.

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“…However, when the doping concentrations were increasing to 0.3% and 0.5%, an initial faster decay appears. The luminescence lifetime values can be obtained by tting the curves with a double exponential decay function, as shown in Equation 6 [38] and Equation 7 [44] . (see Equations 6 and 7 in the Supplementary Files) where A, B 1 and B 2 are constants, I represents the emission intensity at time t, τ 1 and τ 2 represent the two luminescence lifetime values of the ceramics.…”

Section: The Relationship Between the Energy Level Of Mn 4+ And The Cmentioning

confidence: 99%

Deep-red emitting Mg2TiO4:Mn4+ phosphor ceramics for plant lighting

Wang

Lin

Zhang

et al. 2020

Preprint

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In this study, deep red emitting Mg2TiO4:Mn4+ phosphor ceramics were synthesized by the high temperature solid-state reaction method. The ceramics can be excited by the 465 nm blue light and had a narrow emission with a full width at half maximum (FWMH) value of 31 nm. The peak wavelength was located at 658 nm, which matched the most efficient wavelength for photosynthesis. The crystal field strength (Dq) and the Racah parameters (B and C) are estimated by Tanabe-Sugano diagram. The thermal conductivity of the ceramics was 7.535 W/(m·K) at room temperature, which was one order of magnitude higher than that of the traditional packaging method using silicone gel. A set of phosphor converted LEDs were fabricated by mounting the phosphor ceramics onto the 460 nm blue LED chips and the CIE coordinates can move from the blue light region to the purple light region with the thickness of the ceramic increasing. These results indicated that the Mg2TiO4:Mn4+ phosphor ceramic was suitable for plant lighting when combined with a blue LED chip.

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Deep-red-emitting SrLa2Sc2O7:Mn4+ phosphor: Synthesis and photoluminescence properties

Cited by 40 publications

References 43 publications

An efficient far‐red emission Sr₂InSbO₆:Mn⁴⁺, M (M = Li⁺, Na⁺, and K⁺) phosphors for plant cultivation LEDs

An efficient far‐red emission Sr₂InSbO₆:Mn⁴⁺, M (M = Li⁺, Na⁺, and K⁺) phosphors for plant cultivation LEDs

Enhanced luminescence of Mn4+-activated CaAl12O19 red phosphors by synergetic manipulation of the flux effect and charge compensation for warm WLEDs application

Deep-red emitting Mg2TiO4:Mn4+ phosphor ceramics for plant lighting

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Deep-red-emitting SrLa2Sc2O7:Mn4+ phosphor: Synthesis and photoluminescence properties

Cited by 40 publications

References 43 publications

An efficient far‐red emission Sr2InSbO6:Mn4+, M (M = Li+, Na+, and K+) phosphors for plant cultivation LEDs

An efficient far‐red emission Sr2InSbO6:Mn4+, M (M = Li+, Na+, and K+) phosphors for plant cultivation LEDs

Enhanced luminescence of Mn4+-activated CaAl12O19 red phosphors by synergetic manipulation of the flux effect and charge compensation for warm WLEDs application

Deep-red emitting Mg2TiO4:Mn4+ phosphor ceramics for plant lighting

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An efficient far‐red emission Sr₂InSbO₆:Mn⁴⁺, M (M = Li⁺, Na⁺, and K⁺) phosphors for plant cultivation LEDs

An efficient far‐red emission Sr₂InSbO₆:Mn⁴⁺, M (M = Li⁺, Na⁺, and K⁺) phosphors for plant cultivation LEDs