Long persistent luminescence properties of NaBaScSi2O7: Tb3+ and it’s applications above room temperature

Up to now, PersL materials emitting visible light have been extensively studied and applied in emergency signage, optical data storage and anti-counterfeiting, energy-saving catalysis, and many other aspects. [10][11][12][13][14][15][16][17][18][19] Recently, near-IR (NIR) PersL materials have received particular interest due to their great application prospects in various biomedical applications, such as autofluorescence-free bioimaging, longterm biomolecule tracking. [20][21][22][23][24][25][26][27] However, in stark contrast to the evolving progress in the research of the PersL materials in visible region, the study concerning the design and development of NIR PersL materials is still lacking. [28,29] Hence, it is significantly important to develop and make up the number of NIR PersL materials.The luminescent materials are composed of matrixes and activators, the activators exist as emission centers while the matrixes provide an appropriate crystal environment for activators. [30] At present, most reported NIR PersL materials are based on Cr 3+ emitters. [28] Nevertheless, the toxicity of chromium might lead to biosafety and biodistribution issues of these Cr 3+ -activated materials in organisms, which would severely hindered further practical bioapplications. [31][32][33] As an essential element of the human body, the promising and so far rarely investigated ferric ions can be a considerable candidate for activator ions to address the toxicity issue of Cr 3+ . [34] Unfortunately, the number of studies on the rational design of Fe 3+doped NIR PersL remains very quiet. [35,36] Hitherto, the majority of the research concerning Fe 3+ -activated luminescent materials is devoted to their photoluminescence (PL) properties and the related luminescence thermometer application. [37,38] This may be because Fe 3+ is usually regarded as a luminescent quencher, and it is hard to control the crystal environments of the matrixes for achieving PersL of Fe 3+ . Therefore, it is vital importance to explore a special crystal structure and regulate the defect properties for the development of Fe 3+ -activated NIR PersL materials.Spinel configuration can be one of the best host material candidates when designing PersL materials owing to the easy formation of vacancies and anti-site defects. [39,40] However, the PersL from Fe 3+ doped in spinel-type compounds has never been reported before. [41] Herein, we propose a new strategy of defect enrichment for the activation of PersL, and in contrast to the normal spinel configuration, we demonstrate that the crystal structure of near inverse spinel ensures more numerous Spinel configuration is a kind of broadly considered host candidate when designing persistent luminescence (PersL) materials due to the easy generation of vacancies and anti-site defects. Here, a new strategy of defect enrichment for the activation of PersL is proposed, and in contrast to the spinel configuration, it is demonstrated that the crystal structure of near inverse spinel ensures more numerous defects to activat...

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Defect Enrichment in Near Inverse Spinel Configuration to Enhance the Persistent Luminescence of Fe³⁺

Zhou

Zhang

et al. 2021

Advanced Optical Materials

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“…The performance of LPL is critically dependent on the traps, where the carriers are released for ambient thermal disturbance. 34 Hence, it is speculated that the LPL after the mechanical stimulus is related to the depth of the traps, which is further discussed later.…”

Section: Resultsmentioning

confidence: 97%

Stress memory for the visualization detection of complicated mechanical structures via trap structure manipulation

Liu

Zhao

et al. 2022

J. Mater. Chem. C

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“…The reason for choosing 1% over 2% Cr 3+ -doped sample, which has the strongest PL emission, is that the 1% doped sample exhibits the longest afterglow decay time and the best NIR afterglow properties. Usually, the doping concentration of the best afterglow property sample is lower than that of the best PL property sample, which is widely found in many afterglow materials. − Figure a,b presents the afterglow emission spectra of the sample after being excited under 254 nm UV light for 10 min. Obviously, even removing excitation for 10 h, the instrument can still detect the afterglow emission, and it means that the afterglow decay time can last over 10 h. The afterglow emission spectra can cover from 650 to 850 nm, which is in the NIR-I area.…”

Section: Resultsmentioning

confidence: 99%

Near-Infrared Emission Material with Superlong Afterglow Performance and Its Multifunctional Applications

Ding

Wang

et al. 2023

Inorg. Chem.

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A new near-infrared (NIR) emission material, BaSi1.5Ge2.5O9:Cr3+, with outstanding long afterglow properties is designed and synthesized successfully. Its structure, photoluminescence, and long afterglow emission features are studied in detail. Cr3+ occupies six-coordinated Ba2+ and Ge4+ sites in this system, which can emit characteristic broadband NIR light in the range of 700–1200 nm, and it has a long afterglow emission of more than 10 h. We calculated the band gap of the host at about 4.1 eV, the energy level distribution after Cr3+ doping, and the distribution of oxygen vacancies through density functional theory simulation, which theoretically proved the characteristic transition of Cr3+ and that the oxygen vacancies are crucial to form the defect energy levels. This is corroborated with the reflectance spectra, three-dimensional thermoluminescence spectra, and electron spin resonance (ESR) spectra. The oxygen-deficient environment favors the formation of oxygen vacancy defects and prevents the oxidation of Cr3+ to Cr6+, which are the key points for the luminescence and afterglow properties. A mechanistic model of defect formation and electron trapping and transport processes is successfully established. Finally, its multifunctional applications in information anticounterfeiting encryption, biological tissue penetration, and internal nondestructive testing and imaging are demonstrated.

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Long persistent luminescence properties of NaBaScSi2O7: Tb3+ and it’s applications above room temperature

Cited by 36 publications

References 35 publications

Defect Enrichment in Near Inverse Spinel Configuration to Enhance the Persistent Luminescence of Fe³⁺

Defect Enrichment in Near Inverse Spinel Configuration to Enhance the Persistent Luminescence of Fe³⁺

Stress memory for the visualization detection of complicated mechanical structures via trap structure manipulation

Near-Infrared Emission Material with Superlong Afterglow Performance and Its Multifunctional Applications

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Long persistent luminescence properties of NaBaScSi2O7: Tb3+ and it’s applications above room temperature

Cited by 36 publications

References 35 publications

Defect Enrichment in Near Inverse Spinel Configuration to Enhance the Persistent Luminescence of Fe3+

Defect Enrichment in Near Inverse Spinel Configuration to Enhance the Persistent Luminescence of Fe3+

Stress memory for the visualization detection of complicated mechanical structures via trap structure manipulation

Near-Infrared Emission Material with Superlong Afterglow Performance and Its Multifunctional Applications

Contact Info

Product

Resources

About

Defect Enrichment in Near Inverse Spinel Configuration to Enhance the Persistent Luminescence of Fe³⁺

Defect Enrichment in Near Inverse Spinel Configuration to Enhance the Persistent Luminescence of Fe³⁺