Simultaneous NIR photoluminescence and mechanoluminescence from Cr3+ activated MgGa2O4 phosphors with multifunctions for optical sensing

Wang, Yaowu; Pan, Guocheng; Wang, Jianfeng; Li, Yinyan; Wu, Zhenping; Xu, Shiqing; Bai, Gongxun

doi:10.1039/d4tc00059e

J. Mater. Chem. C

2024

DOI: 10.1039/d4tc00059e

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Simultaneous NIR photoluminescence and mechanoluminescence from Cr³⁺ activated MgGa₂O₄ phosphors with multifunctions for optical sensing

Yaowu Wang,

Guocheng Pan,

Jianfeng Wang

et al.

Abstract: Light-emitting diodes (LEDs) combined with near-infrared (NIR) phosphors are rapidly becoming important light sources for food safe, anti-counterfeiting and biological imaging due to non-destructive and non-toxic advantages. Single-phase materials with...

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Regulation of Intrinsic Defects of Self‐Activated MgGa₂O₄ Phosphors for Temperature Dynamic Anti‐Counterfeiting

Wang,

Yue

et al. 2024

Laser & Photonics Reviews

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Photoluminescent (PL) anti‐counterfeiting plays a critical role in encrypted information and anti‐counterfeiting. Dynamic PL anti‐counterfeiting technology provides advanced security features compared with static counterparts. Yet, many current dynamic luminescent materials rely solely on an optical storage mechanism, leading to a lack of diversification and making them vulnerable to replication. Here, dynamic PL emission triggered by ambient temperature variations is addressed. By modifying the sintering atmospheres and non‐stoichiometric ratio of MgGa2O4 (MGO) samples, the concentration of intrinsic defects of the host are modified, resulting in temperature‐sensitive PL output dynamically manipulated from blue to green to red. Density‐functional theory (DFT) analysis elucidates the formation energies of intrinsic defects in the MGO samples, revealing that the self‐activated blue, green, and red emissions stem from lattice defects, [GaO6], antisite defects , and interstitial oxygen (), respectively. Additionally, by monitoring the luminescence lifetime, and the thermoluminescence (TL) curves of the MGO samples, it is shown that the dynamic PL emission is generated by a combination of thermally assisted carrier migration and thermal compensation from trapping centers. Herein, a dual‐channel encrypted dot matrix is designed to enhance information transfer security through the interference between the dual channels, showcasing the practical application of this dynamic anti‐counterfeiting technique.

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Regulation of Intrinsic Defects of Self‐Activated MgGa₂O₄ Phosphors for Temperature Dynamic Anti‐Counterfeiting

Wang,

Yue

et al. 2024

Laser & Photonics Reviews

View full text Add to dashboard Cite

show abstract

Regulating the redshift of the charge transfer band edge and antithermal quenching by ion substitution strategy in YP1-xVxO4:Eu3+ phosphor

Liu,

Yang,

Liu

et al. 2024

Ceramics International

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Differential substitution of Ga3+ by Mn2+ and Cr3+ in LiGa5O8 to prepare multi-mode fluorescent materials as array elements for anti-counterfeiting

Lu,

Wang,

Zhu

2024

Journal of Alloys and Compounds

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Simultaneous NIR photoluminescence and mechanoluminescence from Cr³⁺ activated MgGa₂O₄ phosphors with multifunctions for optical sensing

Abstract: Light-emitting diodes (LEDs) combined with near-infrared (NIR) phosphors are rapidly becoming important light sources for food safe, anti-counterfeiting and biological imaging due to non-destructive and non-toxic advantages. Single-phase materials with...

Cited by 5 publications

References 59 publications

Regulation of Intrinsic Defects of Self‐Activated MgGa₂O₄ Phosphors for Temperature Dynamic Anti‐Counterfeiting

Regulation of Intrinsic Defects of Self‐Activated MgGa₂O₄ Phosphors for Temperature Dynamic Anti‐Counterfeiting

Regulating the redshift of the charge transfer band edge and antithermal quenching by ion substitution strategy in YP1-xVxO4:Eu3+ phosphor

Differential substitution of Ga3+ by Mn2+ and Cr3+ in LiGa5O8 to prepare multi-mode fluorescent materials as array elements for anti-counterfeiting

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Simultaneous NIR photoluminescence and mechanoluminescence from Cr3+ activated MgGa2O4 phosphors with multifunctions for optical sensing

Abstract: Light-emitting diodes (LEDs) combined with near-infrared (NIR) phosphors are rapidly becoming important light sources for food safe, anti-counterfeiting and biological imaging due to non-destructive and non-toxic advantages. Single-phase materials with...

Cited by 5 publications

References 59 publications

Regulation of Intrinsic Defects of Self‐Activated MgGa2O4 Phosphors for Temperature Dynamic Anti‐Counterfeiting

Regulation of Intrinsic Defects of Self‐Activated MgGa2O4 Phosphors for Temperature Dynamic Anti‐Counterfeiting

Regulating the redshift of the charge transfer band edge and antithermal quenching by ion substitution strategy in YP1-xVxO4:Eu3+ phosphor

Differential substitution of Ga3+ by Mn2+ and Cr3+ in LiGa5O8 to prepare multi-mode fluorescent materials as array elements for anti-counterfeiting

Contact Info

Product

Resources

About

Simultaneous NIR photoluminescence and mechanoluminescence from Cr³⁺ activated MgGa₂O₄ phosphors with multifunctions for optical sensing

Regulation of Intrinsic Defects of Self‐Activated MgGa₂O₄ Phosphors for Temperature Dynamic Anti‐Counterfeiting

Regulation of Intrinsic Defects of Self‐Activated MgGa₂O₄ Phosphors for Temperature Dynamic Anti‐Counterfeiting