Site occupation and upconversion process enabled multicolor emission in a Gd3GaO6:Bi3+,Er3+ phosphor for quad-mode anti-counterfeiting

Li, Zhijun; Lyu, Zeyu; Luo, Pengcheng; Wei, Shuai; Zhuo, Chengyu; Sun, Dashuai; Shen, Sida; You, Hongpeng

doi:10.1039/d3qi01525d

Cited by 5 publications

(3 citation statements)

References 42 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, two peaks at ∼159.6 and 162.8 eV revealed the presence of Bi in lower valent oxidation states, i.e., Bi n+ (0 < n < 3). 37 The appearance of deconvoluted peaks of Bi 4f 7/2 and Bi 4f 5/2 levels at lower binding energies may be ascribed to the presence of metallic Bi (Bi 0 ) and Bi 2+ ions. 51−53 The Er 4d peaks were observed at ∼169.3 eV in XPS spectra in the 2 mol % Bi 3+codoped sample (Figure 1f).…”

Section: Hydrodynamic Size Measurementmentioning

confidence: 99%

“…Next, the color tuning of UC emissions can be attained by modifying the local crystal field and dynamics of UC processes via defect engineering by doping impurity ions. ,, In recent years, various codopant ions, such as Mn 2+ , Cr 3+ , Li + , Na + , Mg 2+ , and Bi 3+ , have been explored for tuning the UC emissions. − ,, It has been found that Bi 3+ codoping in Er 3+ -doped UC materials can modulate the UC emissions through crystal field distortion, energy transfer, defect tuning, and manipulation of nonradiative channels. − Hence, investigating the effect of defect manipulation on the excited state absorption of NIR photons by Er 3+ ions will provide a better understanding of the role of defects on UC dynamics.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

ZnAl₂O₄:Er³⁺ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

Balhara,

Gupta,

Sudarshan

et al. 2024

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

This work reports an "all-in-one" theranostic upconversion luminescence (UCL) system having potential for both diagnostic and therapeutic applications. Despite considerable efforts in designing upconversion nanoparticles (UCNPs) for multimodal imaging and tumor therapy, there are few reports investigating dual modality SPECT/optical imaging for theranostics. Especially, research focusing on in vivo biodistribution studies of intrinsically radiolabeled UCNPs after intravenous injection is of utmost importance for the potential clinical translation of such formulations. Here, we utilized the gamma emission from 169 Er and 171 Er radionuclides for the demonstration of radiolabeled ZnAl 2 O 4 : 171/169 Er 3+ as a potent agent for dual-modality SPECT/ optical imaging. No uptake of radio nanoformulation was detected in the skeleton after 4 h of administration, which evidenced the robust integrity of ZnAl 2 O 4 : 169/171 Er 3+ . Combining the therapeutics using the emission of β − particulates from 169 Er and 171 Er will be promising for the radio-theranostic application of the synthesized ZnAl 2 O 4 : 169/171 Er 3+ nanoformulation. Cell toxicity studies of ZnAl 2 O 4 :1%Er 3+ nanoparticles were examined by an MTT assay in B16F10 mouse melanoma cell lines, which demonstrated good biocompatibility. In addition, we explored the mechanism of UCL modulation via defect engineering by Bi 3+ codoping in the ZnAl 2 O 4 :Er 3+ upconversion nanophosphor. The UCL color tuning was successfully achieved from the red to the green region as a function of Bi 3+ codoping concentrations. Further, we tried to establish a correlation of UCL tuning with the intrinsic oxygen and cation vacancy defects as a function of Bi 3+ codoping concentrations with the help of electron paramagnetic resonance (EPR) and positron annihilation lifetime spectroscopy (PALS) studies. This study contributes to building a bridge between nature of defects and UC luminescence that is crucial for the design of advanced UCNPs for theranostics.

show abstract

Section: Hydrodynamic Size Measurementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

ZnAl₂O₄:Er³⁺ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

Balhara,

Gupta,

Sudarshan

et al. 2024

ACS Appl. Bio Mater.

View full text Add to dashboard Cite

show abstract

“…[9] Gao et al proposed Zn 3 Ga 2 GeO 8 : Cr 3+ , Yb 3+ , Er 3+ , and Zn 1.6 Li 0.4 GeO 4 : Mn 2+ persistent phosphors as the luminescent inks. [10] However, the multi-modal emission of the above materials often requires co-doping or solid solution strategies to introduce more luminescent ions, which increases the cost and complexity of the material design and also increases the workload. [11] In addition, when a variety of rare earth ions are doped, there are also certain requirements for the crystal structure of the host.…”

Section: Introductionmentioning

confidence: 99%

Achieving Multicolor Anti‐Counterfeiting via Simultaneous X‐Ray and UV/Blue Excitation in Ca₂YMgScSi₃O₁₂: Mn²⁺

Wang,

Dai,

et al. 2024

Advanced Optical Materials

View full text Add to dashboard Cite

Optical materials have attracted much attention in anti‐counterfeiting applications due to their visualization and multi‐emission modes. However, the unit occupancy predestines the material to only monochromatic emission, inhibiting the application of optical materials in advanced information encryption. Here, a green to yellow to deep‐red phosphor is reported in a Mn2+‐activated garnet compound Ca2YMgScSi3O12: Mn2+ (CYMSS: Mn2+), originating from the abundant lattice sites occupying within the crystal structure by Mn2+ ions. Three different photoluminescence (PL) emission bands peaked at 517, 576, and 720 nm from 4T1 (G) → 6A1 (S) are observed, which are attributed to the substitution of [Sc/MgO6] octahedron and [Ca/YO8] dodecahedron sites by Mn2+ ions, respectively. Hence, tunable emissions from green to deep‐red are realized in single Mn2+ doping by switching the excitation source of ultraviolet (UV)/blue and X‐ray, which can be further regulated by varying the Mn2+ concentration. Multi‐position occupying, color‐tunable light‐emitting materials offer the possibility of more advanced optical information encryption.

show abstract

Sunlight‐Activated Eu²⁺‐Doped Red Persistent Luminescence Material for Night‐Vision Signage, Anti‐Counterfeiting and Location Detection

Huo,

Wang,

Meng

et al. 2024

Laser & Photonics Reviews

View full text Add to dashboard Cite

Persistent luminescence materials have been widely studied due to their excellent optical properties. However, they can only be activated by UV light; in other words, the charging method for these phosphors is limited. In fact, materials that can continuously emit light when exposed to sunlight are highly sought after for their potential to reduce energy consumption. Warm‐colored persistent luminescence materials are particularly useful for information storage, security marking, and preventing counterfeiting. Nevertheless, creating effective warm‐color persistent luminescence materials that are activated by sunlight remains a challenging task. To address this issue, novel daylight‐activated red persistent luminescence materials, Gd3‐xCax‐0.02GaO6:0.02Eu2+ (x = 0.3 ‐ 0.7) are explored. The material can be effectively activated by sunlight under all weather conditions, as well as by bright light from indoor lamps, mobile phone screens, and any form of visible light. Moreover, it possesses excellent water resistance. The process of electron trapping and release within the material is investigated through thermoluminescence experiments, photoluminescence spectra, and persistent luminescence spectra. Importantly, this phosphor has been demonstrated for various applications, including night vision marking, anti‐counterfeiting, optical information storage, and positioning, among others.

show abstract

Site occupation and upconversion process enabled multicolor emission in a Gd₃GaO₆:Bi³⁺,Er³⁺ phosphor for quad-mode anti-counterfeiting

Abstract: Enabled by the site occupation dependent emission of Bi3+ and the upconversion process dependent emission of Er3+, quad-mode anti-counterfeiting with four distinguishable images is achieved with only the Gd3GaO6:Bi3+,Er3+ phosphor.

Cited by 5 publications

References 42 publications

ZnAl₂O₄:Er³⁺ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

ZnAl₂O₄:Er³⁺ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

Achieving Multicolor Anti‐Counterfeiting via Simultaneous X‐Ray and UV/Blue Excitation in Ca₂YMgScSi₃O₁₂: Mn²⁺

Sunlight‐Activated Eu²⁺‐Doped Red Persistent Luminescence Material for Night‐Vision Signage, Anti‐Counterfeiting and Location Detection

Contact Info

Product

Resources

About

Site occupation and upconversion process enabled multicolor emission in a Gd3GaO6:Bi3+,Er3+ phosphor for quad-mode anti-counterfeiting

Abstract: Enabled by the site occupation dependent emission of Bi3+ and the upconversion process dependent emission of Er3+, quad-mode anti-counterfeiting with four distinguishable images is achieved with only the Gd3GaO6:Bi3+,Er3+ phosphor.

Cited by 5 publications

References 42 publications

ZnAl2O4:Er3+ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

ZnAl2O4:Er3+ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

Achieving Multicolor Anti‐Counterfeiting via Simultaneous X‐Ray and UV/Blue Excitation in Ca2YMgScSi3O12: Mn2+

Sunlight‐Activated Eu2+‐Doped Red Persistent Luminescence Material for Night‐Vision Signage, Anti‐Counterfeiting and Location Detection

Contact Info

Product

Resources

About

Site occupation and upconversion process enabled multicolor emission in a Gd₃GaO₆:Bi³⁺,Er³⁺ phosphor for quad-mode anti-counterfeiting

ZnAl₂O₄:Er³⁺ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

ZnAl₂O₄:Er³⁺ Upconversion Nanophosphor for SPECT Imaging and Luminescence Modulation via Defect Engineering

Achieving Multicolor Anti‐Counterfeiting via Simultaneous X‐Ray and UV/Blue Excitation in Ca₂YMgScSi₃O₁₂: Mn²⁺

Sunlight‐Activated Eu²⁺‐Doped Red Persistent Luminescence Material for Night‐Vision Signage, Anti‐Counterfeiting and Location Detection