Rapid annealing-transformed, intense-red-emitting Eu-doped ZnGa2O4 nanoparticles with high colour purity, for very-high-resolution display applications

N, Deepak Hebbar; Choudhari, K.S.; Pathak, Nimai; Shivashankar, S. A.; Kulkarni, Suresh D.

doi:10.1016/j.materresbull.2019.110544

Cited by 24 publications

(12 citation statements)

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“…22,38 Employing a similar combination of MAST and RA, we recently showed that in Eu 3+ :ZnGa 2 O 4 synthesised by MAST, a mere 10 min of RA intensified the red emission, enhancing its color purity while retaining the small particle size. 40 This is in contrast to earlier reports in which Sai et al and Menon et al showed that there is an increase in the crystallite size with the RA temperature for ZnFe 2 O 4 38 and Cr: ZnAl 2 O 4 37 samples. Notably, ZnAl 2 O 4 , like ZnGa 2 O 4 , is transparent to visible-NIR; however, when doped with chromium, grain growth was observed.…”

Section: Introductioncontrasting

confidence: 59%

Rapid annealing: minutes to enhance the green emission of the Tb³⁺-doped ZnGa₂O₄nanophosphor with restricted grain growth

et al. 2022

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Section: Introductioncontrasting

confidence: 59%

Rapid annealing: minutes to enhance the green emission of the Tb³⁺-doped ZnGa₂O₄nanophosphor with restricted grain growth

et al. 2022

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“…4a). The sharp and strong emission bands at 579, 590, 615, 652 and 700 nm correspond to Eu 3+ 5 D 0 → 7 F j transitions where j = 0–4 43–45 and the emission bands at 487, 545, 586 and 621 nm correspond to Tb 3+ 5 D 4 → 7 J j transitions where ( j = 6–3). 46 The variations in the emission intensities of Tb 3+ (545 nm) and Eu 3+ (615 nm) as a function of annealing temperature are given in Fig.…”

Section: Resultsmentioning

confidence: 97%

“…All the bands in the spectra correspond to Eu 3+ and Tb 3+ transitions. 43,44 The variations in emission intensity, as induced by annealing, lead to a shift of the CIE coordinates in the chromaticity diagram from blue to the balanced white light region and from the balanced white light region to the red region (Fig. 4c).…”

Section: Resultsmentioning

confidence: 99%

Microwave-assisted synthesis of ZnGa_2−x−yEu_xTb_yO₄ luminescent nanoparticles showing balanced white-light emission

et al. 2022

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“…Figure 4(B) shows the decay curve of afterglow and its corresponding second‐order fitting curve of 0.5 at.% Cr:ZnGa 2 O 4 transparent ceramics. The fitting formula was as follows 30 :

I (normalt) = A_{1} \exp (‐ \frac{t}{τ_{1}}) + A_{2} \exp (‐ \frac{t}{τ_{2}})

I(t) is the intensity, τ 1 and τ 2 are the emission attenuation lifetime. A 1 and A 2 are the relative weights.…”

Section: Resultsmentioning

confidence: 99%

Fabrication and characterizations of Cr³⁺‐doped ZnGa₂O₄ transparent ceramics with persistent luminescence

Liu

Mao

et al. 2021

J Am Ceram Soc

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Long afterglow materials have been studied continuously due to its unique mechanisms of light storage and luminescence. The long afterglow materials will undergo three stages of absorption, energy transfer, and luminescence to release the energy in the form of long-term continuous luminescence after removing the excitation source. 1 The long afterglow is determined by the luminescence center. At present, only some rareearth ions (Ce 3+ , Pr 3+ , Sm 3+ , Eu 2+ , Eu 3+ , Tb 3+ , Dy 3+ , Tm 3+ , Yb 2+ , Yb 3+ , etc.), transition-metal ions (Cr 3+ , Mn 2+ , Mn 4+ , Ti 4+ , etc.), main group elements (Bi 3+ , etc.), and some crystal defects show their characteristic phosphorescence. 2-7 Since Matsuzawa et al. discovered the continuous luminescence of SrAl 2 O 4 :Eu 2+ , Dy 3+ more than 20 years ago, this material has attracted extensive attention. Many other long afterglow material systems have been also discovered and studied successively, including sulfide, aluminate, silicate, gallate, and so on. 8 Among them, green luminescent materials such as SrAl 2 O 4 :Eu 2+ , Dy 3+ and blue luminescent materials such as CaAl 2 O 4 :Eu 2+ , Nd 3+ have been mature and commercialized in many application fields due to their excellent afterglow performance, however, the research and development of long afterglow materials that can produce red and near-infrared emission are still relatively scarce. 9 Cr-doped zinc gallate has good long afterglow emissions in red and near-infrared regions. [10][11][12][13] Spinel ZnGa 2 O 4 has a wide band gap (4.4-5.0 eV), high chemical stability, and thermal stability. [14][15][16][17][18] In the process of practical application, long afterglow materials will confront harsh environments

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Rapid annealing-transformed, intense-red-emitting Eu-doped ZnGa2O4 nanoparticles with high colour purity, for very-high-resolution display applications

Cited by 24 publications

References 70 publications

Rapid annealing: minutes to enhance the green emission of the Tb³⁺-doped ZnGa₂O₄nanophosphor with restricted grain growth

Rapid annealing: minutes to enhance the green emission of the Tb³⁺-doped ZnGa₂O₄nanophosphor with restricted grain growth

Microwave-assisted synthesis of ZnGa_2−x−yEu_xTb_yO₄ luminescent nanoparticles showing balanced white-light emission

Fabrication and characterizations of Cr³⁺‐doped ZnGa₂O₄ transparent ceramics with persistent luminescence

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Rapid annealing-transformed, intense-red-emitting Eu-doped ZnGa2O4 nanoparticles with high colour purity, for very-high-resolution display applications

Cited by 24 publications

References 70 publications

Rapid annealing: minutes to enhance the green emission of the Tb3+-doped ZnGa2O4nanophosphor with restricted grain growth

Rapid annealing: minutes to enhance the green emission of the Tb3+-doped ZnGa2O4nanophosphor with restricted grain growth

Microwave-assisted synthesis of ZnGa2−x−yEuxTbyO4 luminescent nanoparticles showing balanced white-light emission

Fabrication and characterizations of Cr3+‐doped ZnGa2O4 transparent ceramics with persistent luminescence

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Rapid annealing: minutes to enhance the green emission of the Tb³⁺-doped ZnGa₂O₄nanophosphor with restricted grain growth

Rapid annealing: minutes to enhance the green emission of the Tb³⁺-doped ZnGa₂O₄nanophosphor with restricted grain growth

Microwave-assisted synthesis of ZnGa_2−x−yEu_xTb_yO₄ luminescent nanoparticles showing balanced white-light emission

Fabrication and characterizations of Cr³⁺‐doped ZnGa₂O₄ transparent ceramics with persistent luminescence