Improvement of Luminescence Characteristics of ZnGa2O4:Tb3+ Nanophosphors by Ce3+ Codoping

Mu, Boshi; Zhao, Feng; Chu, Yunting; Li, Chengren; Sun, Jingchang; Zhao, Qianyun; Bai, Suyuan

doi:10.1002/ejic.202100976

Cited by 5 publications

(1 citation statement)

References 52 publications

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“…Long persistent luminescence (also referred to as after-glow) is usually associated with inorganic phosphors. [1][2][3][4] Organic or organometallic molecules showing second-long phosphorescence remain relatively rare, although they have gained an increased research interest in the last years and their number has been steadily growing. [5][6][7] Most organometallic compounds, which show long phosphorescence, are metal-organic frameworks (MOF).…”

Section: Introductionmentioning

confidence: 99%

Phase‐Dependent Long Persistent Phosphorescence in Coumarin‐Phosphine‐Based Coinage Metal Complexes

Naina

Singh

Rauthe

et al. 2023

Chemistry A European J

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A coumarin functionalized aminodiphosphine has been introduced as a bidentate ligand in coinage metal chemistry. Mono-, di-, and trimetallic copper and silver complexes were synthesized with this ligand. The hybrid character of the ligand led to compounds with rich luminescence properties. These include coumarin-based blue fluorescence, observed as a sole emission in solution at room temperature, and green phosphorescence, which is efficient at low temperatures and dominates the spectra of the metal complexes. In the rigid environment of frozen solutions, the green phosphorescence shows an unusually long (for metal complexes) decay on the seconds timescale in high quantum yield. In addition, a red phosphorescence, which may be assigned to the triplet state localized in the phosphine-M 3 Cl 2 (M=Cu, Ag), is observed for the trinuclear complexes at low temperature. Neither the second-long phosphorescence nor the red emission is observed for the coumarin ligand, thus they must be a result of the coordination to coinage metal clusters. The excited states in these compounds were also investigated by femtosecond transient absorption spectroscopy and quantum chemical calculations.

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Section: Introductionmentioning

confidence: 99%

Phase‐Dependent Long Persistent Phosphorescence in Coumarin‐Phosphine‐Based Coinage Metal Complexes

Naina

Singh

Rauthe

et al. 2023

Chemistry A European J

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Recent Progress in Inorganic Afterglow Materials: Mechanisms, Persistent Luminescent Properties, Modulating Methods, and Bioimaging Applications

Yang

Gai

Ding

et al. 2023

Advanced Optical Materials

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The ORCID identification number(s) for the author(s) of this article can be found under https://doi.org/10.1002/adom.202202382.the stored excitation energy in energy traps, which can be released by thermal stimulation. [2] Obviously, the process is very different from the real-time excited fluorescence (FL). Usually, the excitation source can be X-ray, ultraviolet (UV), and visible (Vis) light, and there is no need for continuous external light irradiation, while the PL may locate in UV, Vis, or near-infrared (NIR) spectral regions. [3] Especially, Vis emissions are easy to be modulated for colorful light, and NIR emissions in the biological window (≈650-1800 nm) offer deep tissue penetration and prevented autofluorescence. [3a,4] According to the outstanding luminescent properties, enormous opportunities in diverse application fields have been discovered, mainly including long-lasting tumor optical imaging and therapy, [5] security and anti-counterfeiting, [6] optical information and data storage, [7] photocatalysis, [8] fingerprint recognition, [6c] analysis and sensing, [1c,4a,9] as well as the potential applications of synaptic plasticity [10] and light-emitting diodes. [11] Retrieved from Web of Science, > 6800 articles by tracing the themes "afterglow" or "persistent luminescence" or "longlasting luminescence" have been published during the last decade (i.e., ≈2012-2022). Diverse categories of persistent luminescent materials have been developed, such as organic materials, [12] carbon dots, [13] metal-organic frameworks, [14] doped inorganic crystals et al. [2,15] Among them, organic afterglow materials, usually named as organic room temperature phosphorescence materials have recently drawn extensive attention due to the advantage of sustainable resources, low cost, and safety. [16] Based on the composition, organic afterglow materials can be mainly divided into organic small molecules, polymers, and organic-inorganic hybrids, which are normally related to the radiative transition from the lowest excited triplet state (T 1 ) to the ground state (S 0 ). Thus, methods for enhancing the intersystem crossing (ISC) rate are reasonable for realizing highly efficient afterglow, such as introducing heavy atoms, paramagnetic molecules, aromatic carbonyls, heteroatoms, and crystal engineering. [17] Recently, organic room-temperature phosphorescence with a high quantum yield above 56% and long afterglow lifetime longer than 22 s has been achieved by using suitable inorganic framework. [18] Additionally, color-tunable

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Intense Photoluminescence and Mechanoluminescence of Novel BaLaAl₃O₇ : xEu³⁺ Red Nanophosphors

Li,

Guo,

Wang

et al. 2024

Eur J Inorg Chem

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A series of BaLaAl3O7:xEu3+ nanophosphors have been prepared by the high‐temperature solid state reaction method. The XRD and SEM characterization results present that there exists a slight influence on the crystal structure and the average particle size of the nanophosphors while the Eu3+ ions are doped into the matrix. The intense and narrow red photoluminescence spectra have been measured under the ultraviolet excitation and there are two optimal Eu3+ concentrations of 0.8 and 12 mol%, respectively, and the intensity of the former is stronger than that of the latter. Furthermore, the mechanoluminescence phenomena with the same color are also observed when the samples are scratched with a pen. The calculated results based on the measurements of thermoluminescence spectra reveal that the total initial concentration of trapped carriers of BaLaAl3O7:12Eu3+ nanophosphors is larger than that of BaLaAl3O7:0.8Eu3+ sample, which causes the change trend of ML intensity to be opposite to that of PL intensity even though both have the same Eu3+ doping concentrations.

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Improvement of Luminescence Characteristics of ZnGa₂O₄:Tb³⁺ Nanophosphors by Ce³⁺ Codoping

Cited by 5 publications

References 52 publications

Phase‐Dependent Long Persistent Phosphorescence in Coumarin‐Phosphine‐Based Coinage Metal Complexes

Phase‐Dependent Long Persistent Phosphorescence in Coumarin‐Phosphine‐Based Coinage Metal Complexes

Recent Progress in Inorganic Afterglow Materials: Mechanisms, Persistent Luminescent Properties, Modulating Methods, and Bioimaging Applications

Intense Photoluminescence and Mechanoluminescence of Novel BaLaAl₃O₇ : xEu³⁺ Red Nanophosphors

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Improvement of Luminescence Characteristics of ZnGa2O4:Tb3+ Nanophosphors by Ce3+ Codoping

Cited by 5 publications

References 52 publications

Phase‐Dependent Long Persistent Phosphorescence in Coumarin‐Phosphine‐Based Coinage Metal Complexes

Phase‐Dependent Long Persistent Phosphorescence in Coumarin‐Phosphine‐Based Coinage Metal Complexes

Recent Progress in Inorganic Afterglow Materials: Mechanisms, Persistent Luminescent Properties, Modulating Methods, and Bioimaging Applications

Intense Photoluminescence and Mechanoluminescence of Novel BaLaAl3O7 : xEu3+ Red Nanophosphors

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Product

Resources

About

Improvement of Luminescence Characteristics of ZnGa₂O₄:Tb³⁺ Nanophosphors by Ce³⁺ Codoping

Intense Photoluminescence and Mechanoluminescence of Novel BaLaAl₃O₇ : xEu³⁺ Red Nanophosphors