Pr<sup>3+</sup>-doped nanoscintillators with concentration-quenching-free properties

Zhang, Lin; Li, Yantao; Ye, Huiru; Zhao, Lei; Song, Qingwei; Du, Weidong; Chen, Xukai; Wei, Wei

doi:10.1039/d2cc06555j

Cited by 3 publications

(2 citation statements)

References 27 publications

(22 reference statements)

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“…This multisite ligand structure could provide suitable doping sites for many RE ions. The trivalent praseodymium (Pr 3+ ) ion possesses a unique 4f 2 structure and many kinds of potential transition channels in the visible and infrared spectral regions. − When the Pr 3+ ion is doped into Y 2 SiO 5 crystals, an energy-level transition of 3 H 4 → 1 D 2 can be activated . Due to the crystal field interactions of Pr 3+ in the host Y 2 SiO 5 , the 3 H 4 and 1 D 2 states can further split to 9 and 5 Stark levels, respectively.…”

Section: Introductionmentioning

confidence: 99%

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals

Ji,

Ju,

Yuan

et al. 2024

J. Phys. Chem. A

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Trivalent praseodymium (Pr3+)-doped yttrium silicate (Y2SiO5) crystals have been widely used in various phosphors owing to their excellent luminescence characteristics. Although a series of studies have been carried out on its application prospects, the electronic structures and energy-transfer mechanisms of Pr3+-doped Y2SiO5 (Y2SiO5:Pr) remain an exploratory topic. Herein, the crystal structure analysis by the particle swarm optimization structure search method is used to study the structural evolution of Y2SiO5:Pr. Two novel structures with local [PrO7]−11 and [PrO6]−9 [Y2SiO5:Pr (I) and Y2SiO5:Pr (II)] are successfully identified. The impurity Pr3+ ions occupy the Y3+ sites and successfully integrate into the Y2SiO5 host crystal with a Pr3+ concentration of 6.25%. The calculated electronic band structures show that the doping of Pr3+ induces a reduction in band gaps for the host Y2SiO5 crystal. The conduction bands near the Fermi level are completely composed of f states. For the atomic energies of Pr3+ in Y2SiO5, the Stark levels and transitions are properly simulated based on a new set of crystal field parameters (CFPs) at the C 1 site symmetry. A satisfactory r.m.s. dev. of 15.57 cm–1 with 9 free ion parameters (plus 27 fixed CFPs as obtained from ab initio calculation) fitted to the 33 observed levels is obtained for the first time. The plentiful energy-level transition lines, from the visible light to the near-infrared region, are deciphered for Pr3+ in Y2SiO5. Blue 3P0 → 3H4 at 465 nm is calculated to be a strong emission line, and it might be an ideal channel for laser actions. These results could not only provide important insights into the rare-earth-doped crystals but also lay the foundation for future research studies of designing the new laser materials.

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Section: Introductionmentioning

confidence: 99%

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals

Ji,

Ju,

Yuan

et al. 2024

J. Phys. Chem. A

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“…Owing to the deep penetration of X-rays in tissue, lanthanidedoped nanocrystal scintillators are promising for biomedical imaging applications. [9][10][11] Besides, lanthanide-doped scintillators hold great promise for many other applications, such as photodynamic therapy (PDT), [12][13][14] flexible X-ray detectors, [15][16][17][18][19] information storage, [20][21][22] anti-counterfeiting [23,24] and X-ray imaging. [25][26][27] Persistent luminescence (PersL), also known as afterglow or long-lasting phosphorescence, is an optical phenomenon in which luminescent materials are able to continue emitting light for a long time (ranging from seconds to days) after the cessation of external excitation source.…”

Section: Introductionmentioning

confidence: 99%

Current Developments in Emerging Lanthanide‐Doped Persistent Luminescent Scintillators and Their Applications

Ye,

Li,

Chen

et al. 2024

Chemistry A European J

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Lanthanide‐doped scintillators have the ability to convert the absorbed X‐ray irradiation into ultraviolet (UV), visible (Vis), or near‐infrared (NIR) light. Lanthanide‐doped scintillators with excellent persistent luminescence are emerging as a new class of persistent luminescent materials recently. They have attracted great attention due to their unique "self‐luminescence" characteristic and potential applications. In this review, we comb through and focus on current developments of lanthanide‐doped persistent luminescent scintillators (PerLSs), including their persistent luminescence mechanism, synthetic methods, tuning of persistent luminescent properties (e.g. emission wavelength, intensity, and duration time), as well as their promising applications (e.g. information storage, encryption, anti‐counterfeiting, bio‐imaging, and photodynamic therapy). We hope this review will provide valuable guidance for the future development of PerLSs.

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Importance of evaluating the excitation intensity dependence of the temperature-dependent luminescence: Impact on optical thermometry and anti-thermal quenching performance

Zhang,

Li,

Pang

et al. 2023

Materials Today Chemistry

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Pr³⁺-doped nanoscintillators with concentration-quenching-free properties

Abstract: We demonstrate the concentration-quenching-free properties of the 406 nm emission in NaPrF4 nanoscintillators, which result from the large energy gap between the 1S0 and 1I6 states (ΔE = ∼25 000 cm−1) of Pr3+ ions.

Cited by 3 publications

References 27 publications

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals

Current Developments in Emerging Lanthanide‐Doped Persistent Luminescent Scintillators and Their Applications

Importance of evaluating the excitation intensity dependence of the temperature-dependent luminescence: Impact on optical thermometry and anti-thermal quenching performance

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Pr3+-doped nanoscintillators with concentration-quenching-free properties

Abstract: We demonstrate the concentration-quenching-free properties of the 406 nm emission in NaPrF4 nanoscintillators, which result from the large energy gap between the 1S0 and 1I6 states (ΔE = ∼25 000 cm−1) of Pr3+ ions.

Cited by 3 publications

References 27 publications

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr3+-Doped Y2SiO5 Crystals

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr3+-Doped Y2SiO5 Crystals

Current Developments in Emerging Lanthanide‐Doped Persistent Luminescent Scintillators and Their Applications

Importance of evaluating the excitation intensity dependence of the temperature-dependent luminescence: Impact on optical thermometry and anti-thermal quenching performance

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Product

Resources

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Pr³⁺-doped nanoscintillators with concentration-quenching-free properties

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals

Theoretical Determination of the Electronic Structures and Energy-Level Splitting for Pr³⁺-Doped Y₂SiO₅ Crystals