Precisely control the ultraviolet to blue light conversion for plant growth: Rigid crystal structure, lattice substitution and flux effect in the Ca1.1Sr0.9SiO4:Ce3+, Li+ phosphor

Chen, Yue; Xue, Zheng‐Yuan; He, Yang; Han, Yibo; Zhang, Jilin; Qiu, Zhongxian; Zhou, Wenli; Yu, Liping; Lian, Shixun

doi:10.1016/j.materresbull.2022.111760

Cited by 8 publications

(8 citation statements)

References 53 publications

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“…A gradual shift of all the diffraction angles to smaller degrees with increasing Ga 3+ ion concentration appears. According to the Bragg formula (2 d sin θ = n λ, where d is the spacing between the crystal planes, θ is the diffraction angle, n = 1, 2, ..., and λ is the wavelength), this can be attributed to the replacement of Al 3+ , which is a cation with a small ionic radius (CN = 6, r = 0.56 Å) by the larger Ga 3+ cation (CN = 6, r = 0.62 Å), leading to an increase in the value of d and a gradual shift of θ toward smaller diffraction angles diffraction angles, implying the formation of a series of continuous solid-solution phosphors from LaAlO 3 to LaGaO 3 . To further explore the crystal structure and confirm the successful introduction of Ga 3+ ions into the LaAlO 3 lattice, XRD Rietveld refinement was performed for La 0.95 Al 1– y Ga y O 3 :0.05Eu 3+ ( y = 0–1).…”

Section: Resultsmentioning

confidence: 99%

Broadband UV-Excitation and Red/Far-Red Emission Materials for Plant Growth: Tunable Spectrum Conversion in Eu³⁺,Mn⁴⁺ Co-doped LaAl_0.7Ga_0.3O₃ Phosphors

Ding

Zhou

et al. 2023

Inorg. Chem.

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Broadband ultraviolet (UV) excitation and red/farred emission phosphors can effectively convert solar spectrum to enhance photosynthesis and promote morphogenesis in plants. Based on the above application requirements, Eu 3+ single-doped LaAl 1−y Ga y O 3 solid solutions and Eu 3+ ,Mn 4+ codoped LaAl 0.7 Ga 0.3 O 3 phosphors were designed and synthesized in this work. The LaAl 0.7 Ga 0.3 O 3 :0.05Eu 3+ (LAG:Eu 3+ ) phosphor exhibits a strong charge transfer band (CTB) excitation and characteristic 5 D 0 → 7 F 2 transition red emission (619 nm), which is very similar to the luminescence properties of Eu 3+ -organic ligand compound (EuL 3 ). Rietveld refinement studies further revealed that the cation substitution disturbs the site symmetry. The optimal Eu 3+ , Mn 4+ codoped LaAl 0.7 Ga 0.3 O 3 (LAG:Eu,Mn) phosphor possesses a dualband excitation spectrum in broadband ultraviolet (UVA, UVB) area and a dual-band emission spectrum within red/far-red area. Under the sunlight radiation, the real-time spectrum of luminous laminated glasses fabricated by coating the LAG:Eu,Mn phosphor shows the percentage of radiant intensity in the red/far-red region significantly increases, suggesting that the phosphor can be a promising candidate for solar spectral conversion in plant cultivation. We believe this work provides a new idea for developing novel broadband ultraviolet excitation and red/far-red emission phosphors.

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Section: Resultsmentioning

confidence: 99%

Broadband UV-Excitation and Red/Far-Red Emission Materials for Plant Growth: Tunable Spectrum Conversion in Eu³⁺,Mn⁴⁺ Co-doped LaAl_0.7Ga_0.3O₃ Phosphors

Ding

Zhou

et al. 2023

Inorg. Chem.

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“…36 By intentionally modulating and controlling the lattice structure, generating a special microenvironment has attracted considerable academic attention. 37 Phase segregation during phosphor synthesis can cause a new second phase, which can be used to explore the properties of the material, e.g., tuning emission color in (CaMg) x (NaSc) 1−x Si 2 O 6 :Eu 2+38 and K 2 BaCa(PO 4 ) 2 :Eu 2+39 solid solution. This phase segregation variation was also observed from Na 2 A l2 B 2 O 7 :Eu 2+ → NaAl 11 O 17 :Eu 2+ to achieve high thermal stability.…”

Section: Introductionmentioning

confidence: 99%

“…, Previous studies have found that suitable trap levels often exhibit good thermal stability at high temperatures and even zero thermal quenching . By intentionally modulating and controlling the lattice structure, generating a special microenvironment has attracted considerable academic attention . Phase segregation during phosphor synthesis can cause a new second phase, which can be used to explore the properties of the material, e.g., tuning emission color in (CaMg) x (NaSc) 1– x Si 2 O 6 :Eu 2+ and K 2 BaCa(PO 4 ) 2 :Eu 2+ solid solution.…”

Section: Introductionmentioning

confidence: 99%

Vacancy-Enhanced Self-Reduction of Eu in Pyrophosphate Phosphor

Wang,

Su,

Mei

et al. 2023

Inorg. Chem.

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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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“…In recent years, a large number of phosphors with excellent performance have been reported by researchers, such as SrMgAl 10−y Ga y O 17 : Mn 4+ (red phosphor) [1], Ca 1.1 Sr 0.9 SiO 4 : Ce 3+ (blue phosphor) [4] and Ca 3 Al 2 Ge 3 O 12 : Eu 3+ (far-red phosphor) [5]. However, phosphors with high luminous efficiency, good thermal stability and a high degree of match between the emission spectrum and plant pigment absorption spectrum are relatively rare.…”

Section: Introductionmentioning

confidence: 99%

Recent Advances in Light-Conversion Phosphors for Plant Growth and Strategies for the Modulation of Photoluminescence Properties

et al. 2023

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The advent of greenhouses greatly promoted the development of modern agriculture, which freed plants from regional and seasonal constraints. In plant growth, light plays a key role in plant photosynthesis. The photosynthesis of plants can selectively absorb light, and different light wavelengths result in different plant growth reactions. Currently, light-conversion films and plant-growth LEDs have become two effective ways to improve the efficiency of plant photosynthesis, among which phosphors are the most critical materials. This review begins with a brief introduction of the effects of light on plant growth and the various techniques for promoting plant growth. Next, we review the up-to-date development of phosphors for plant growth and discussed the luminescence centers commonly used in blue, red and far-red phosphors, as well as their photophysical properties. Then, we summarize the advantages of red and blue composite phosphors and their designing strategies. Finally, we describe several strategies for regulating the spectral position of phosphors, broadening the emission spectrum, and improving quantum efficiency and thermal stability. This review may offer a good reference for researchers improving phosphors to become more suitable for plant growth.

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Precisely control the ultraviolet to blue light conversion for plant growth: Rigid crystal structure, lattice substitution and flux effect in the Ca1.1Sr0.9SiO4:Ce3+, Li+ phosphor

Cited by 8 publications

References 53 publications

Broadband UV-Excitation and Red/Far-Red Emission Materials for Plant Growth: Tunable Spectrum Conversion in Eu³⁺,Mn⁴⁺ Co-doped LaAl_0.7Ga_0.3O₃ Phosphors

Broadband UV-Excitation and Red/Far-Red Emission Materials for Plant Growth: Tunable Spectrum Conversion in Eu³⁺,Mn⁴⁺ Co-doped LaAl_0.7Ga_0.3O₃ Phosphors

Vacancy-Enhanced Self-Reduction of Eu in Pyrophosphate Phosphor

Recent Advances in Light-Conversion Phosphors for Plant Growth and Strategies for the Modulation of Photoluminescence Properties

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Precisely control the ultraviolet to blue light conversion for plant growth: Rigid crystal structure, lattice substitution and flux effect in the Ca1.1Sr0.9SiO4:Ce3+, Li+ phosphor

Cited by 8 publications

References 53 publications

Broadband UV-Excitation and Red/Far-Red Emission Materials for Plant Growth: Tunable Spectrum Conversion in Eu3+,Mn4+ Co-doped LaAl0.7Ga0.3O3 Phosphors

Broadband UV-Excitation and Red/Far-Red Emission Materials for Plant Growth: Tunable Spectrum Conversion in Eu3+,Mn4+ Co-doped LaAl0.7Ga0.3O3 Phosphors

Vacancy-Enhanced Self-Reduction of Eu in Pyrophosphate Phosphor

Recent Advances in Light-Conversion Phosphors for Plant Growth and Strategies for the Modulation of Photoluminescence Properties

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Product

Resources

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Broadband UV-Excitation and Red/Far-Red Emission Materials for Plant Growth: Tunable Spectrum Conversion in Eu³⁺,Mn⁴⁺ Co-doped LaAl_0.7Ga_0.3O₃ Phosphors

Broadband UV-Excitation and Red/Far-Red Emission Materials for Plant Growth: Tunable Spectrum Conversion in Eu³⁺,Mn⁴⁺ Co-doped LaAl_0.7Ga_0.3O₃ Phosphors