A novel far-red phosphors Li2ZnTi3O8:Cr3+ for indoor plant cultivation:Synthesis and luminescence properties

Cheng, Kang; Xu, Yan; Long, Juling; Huang, Weichao; Deng, Chaoyong

doi:10.1016/j.ceramint.2022.11.169

Cited by 28 publications

(4 citation statements)

References 44 publications

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“…The following formula is used to study the electric multipolar interaction [50–52]:

\frac{I}{x}=k{\left[1+\beta {(x)}^{\frac{\theta }{3}}\right]}^{-1}

where, k and β are the constants, I is the emission intensity, and the doping concentration of Cr 3+ is expressed as. When θ is equal to 6, 8, 10, it denotes a dipole–dipole interaction, dipole–quadrupole interaction and quadrupole–quadrupole interaction, respectively [53,54]. Figure 12b is the fitting dependence of log ( I / x ) on log ( x ).…”

Section: Resultsmentioning

confidence: 99%

Dual substitution of host lattice ions to enhance the luminescence properties of Zn₂TiO₄:Cr³⁺ phosphor

Cheng,

Huang,

Gong

et al. 2024

Luminescence

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Near‐infrared light sources have potential applications in many fields. Cr3+ is a good luminescence centre to prepare near‐infrared phosphors. Improving the performance of existing near‐infrared luminescent materials has indeed attracted great interest from researchers. The luminescence properties of Zn2TiO4:Cr3+ were improved by crystal field engineering strategies. Zn2+–Ti4+ was partially replaced using a Li+–Nb5+ ion pair based on the Zn2TiO4:Cr3+ phosphors. Luminescence Cr3+‐activated luminescent materials are sensitive to changes in the local crystal structure and crystal field environment. Doping of Li+–Nb5+ increased the luminescence intensity up to 2.7 times that of the undoped sample. Also, the thermal stability of the phosphor was greatly increased by the replacement of Li+–Nb5+.

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“…The following formula is used to study the electric multipolar interaction [50–52]:

\frac{I}{x}=k{\left[1+\beta {(x)}^{\frac{\theta }{3}}\right]}^{-1}

Section: Resultsmentioning

confidence: 99%

Dual substitution of host lattice ions to enhance the luminescence properties of Zn₂TiO₄:Cr³⁺ phosphor

Cheng,

Huang,

Gong

et al. 2024

Luminescence

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“…This is a reversible process, viz., P FR can be also converted back to P R by absorbing far-red photons. Under far-red light irradiation, the plants would yield shadeavoidance response as if they were blocked from sunlight [7]. Therefore, it is feasible to increase the productivity or adjust the traits of various crops by varying the spectral components (e.g., P R /P FR ratio) in phytotron chambers or greenhouses [8].…”

Section: Introductionmentioning

confidence: 99%

Optical grade (Gd _{0.95-
x}Lu _xEu _0.05) ₃Al ₅O ₁₂ ceramics with near-zero optical loss: Effects of Lu ³⁺ doping on structural feature, microstructure evolution, and far-red luminescence

Sun,

Li,

Qian

et al. 2024

Journal of Advanced Ceramics

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A chemical co-precipitation strategy was employed to synthesize a series of (Gd 0.95−x Lu x Eu 0.05 ) 3 Al 5 O 12 (x = 0.1−0.95) powder phosphors, followed by vacuum sintering to achieve transparent garnet ceramic phosphors. The density functional theory indicated Lu 3 Al 5 O 12 was formed in priority compared with Gd 3 Al 5 O 12 during solid-phase reaction. Upon high-temperature sintering, the Lu 3+ substitution for Gd 3+ suppressed point mass diffusion leading to a smaller grain size. The in-line transmittances of bulk specimens with x = 0.1, 0.3, 0.5, 0.7, and 0.95 nm were ~83.5%, 80.1%, 68.8%, 73.7%, and 82.2% at 710 nm (Eu 3+ emission center), respectively, among which the sample of x = 0.1 exhibited the optical grade with near-zero optical loss in agreement with the defect-free single crystal (~100% of the theoretical transmittance). The resulting particle and ceramic materials both presented characteristic Eu 3+ emission arising from 5 D 0 → 7 F J (J = 1−4) transition, where the dominant far-red emission at ~710 nm arising from 5 D 0 → 7 F 4 transition overlapped with the absorption of phytochrome (P FR ). The photoluminescence excitation and photoluminescence intensities of (Gd 0.95−x Lu x Eu 0.05 ) 3 Al 5 O 12 powders and ceramics generally increased at a higher Gd 3+ /Lu 3+ ratio. Lu 3+ dopants delayed the fluorescence lifetime while the bulk samples had shorter lifetime compared to the particle counterparts. The transparent (Gd 0.85 Lu 0.1 Eu 0.05 ) 3 Al 5 O 12 ceramic phosphor exhibited good thermal stability with a high thermal quenching temperature above 533 K. The designed ceramic phosphor-converted light-emitting diode had a saturation injection current of 435 mA and a current-dependent color rendering index. More importantly, our report marked the developmental stage of transparent ceramic materials towards zero optical loss.

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“…6–8 The phosphor performance almost ultimately determines the device performance; therefore, the development of broadband NIR phosphors that are thermally stable and can be efficiently excited by InGaN LED chips is crucial. 9–11…”

Section: Introductionmentioning

confidence: 99%

“…[6][7][8] The phosphor performance almost ultimately determines the device performance; therefore, the development of broadband NIR phosphors that are thermally stable and can be efficiently excited by InGaN LED chips is crucial. [9][10][11] The transition metal ion Cr 3+ is considered as an ideal broadband NIR activator. [12][13][14][15] Firstly, Cr 3+ has good absorption in the blue region and can be perfectly matched with blue chips.…”

Section: Introductionmentioning

confidence: 99%

Spectrally tunable near-infrared photoluminescence in MP₃O₉:Cr³⁺ (M = Al, Ga, In) phosphate phosphors

Jiang,

Zhang

et al. 2023

Dalton Trans.

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A novel far-red phosphors Li2ZnTi3O8:Cr3+ for indoor plant cultivation:Synthesis and luminescence properties

Cited by 28 publications

References 44 publications

Dual substitution of host lattice ions to enhance the luminescence properties of Zn₂TiO₄:Cr³⁺ phosphor

Dual substitution of host lattice ions to enhance the luminescence properties of Zn₂TiO₄:Cr³⁺ phosphor

Optical grade (Gd _{0.95-
x}Lu _xEu _0.05) ₃Al ₅O ₁₂ ceramics with near-zero optical loss: Effects of Lu ³⁺ doping on structural feature, microstructure evolution, and far-red luminescence

Spectrally tunable near-infrared photoluminescence in MP₃O₉:Cr³⁺ (M = Al, Ga, In) phosphate phosphors

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A novel far-red phosphors Li2ZnTi3O8:Cr3+ for indoor plant cultivation:Synthesis and luminescence properties

Cited by 28 publications

References 44 publications

Dual substitution of host lattice ions to enhance the luminescence properties of Zn2TiO4:Cr3+ phosphor

Dual substitution of host lattice ions to enhance the luminescence properties of Zn2TiO4:Cr3+ phosphor

Optical grade (Gd 0.95- x Lu x Eu 0.05) 3Al 5O 12 ceramics with near-zero optical loss: Effects of Lu 3+ doping on structural feature, microstructure evolution, and far-red luminescence

Spectrally tunable near-infrared photoluminescence in MP3O9:Cr3+ (M = Al, Ga, In) phosphate phosphors

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Dual substitution of host lattice ions to enhance the luminescence properties of Zn₂TiO₄:Cr³⁺ phosphor

Dual substitution of host lattice ions to enhance the luminescence properties of Zn₂TiO₄:Cr³⁺ phosphor

Optical grade (Gd _{0.95-
x}Lu _xEu _0.05) ₃Al ₅O ₁₂ ceramics with near-zero optical loss: Effects of Lu ³⁺ doping on structural feature, microstructure evolution, and far-red luminescence

Spectrally tunable near-infrared photoluminescence in MP₃O₉:Cr³⁺ (M = Al, Ga, In) phosphate phosphors