Optimization and complexing agent-assisted synthesis of green SrAl 2 O 4 : Eu 2+ , Dy 3+ phosphors through sol–gel process

Du, Hong; Shan, Wenqian; Wang, Liying; Xu, De; Yin, Hao; Chen, Yanwen; Guo, Dongcai

doi:10.1016/j.jlumin.2016.04.003

Cited by 40 publications

(6 citation statements)

References 33 publications

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“…RESA has been employed in a variety of commodities, such as switches, safety marks, luminous ornamental articles, decorations, and directional signs. This can be attributed to its photostability, durability, and long-persistent luminescence. − There are a variety of known rare-earth doped phosphors with the ability to emit the different primary colors, such as Y 2 O 2 S:Eu 3+ , Mg 2+ , Ti 4+ and CaS:Eu 2+ , Tm 3+ , Ce 3+ for red emissions, MgAl 2 O 4 :Mn 2+ and SrAl 2 O 4 : Eu 2+ , Dy 3+ for green emissions, and CaMgSi 2 O 6 :Eu 2+ , Dy 3+ and CaAl 2 O 4 :Eu 2+ , Nd 3+ for blue emissions . However, it proved to be one of the best long-lasting phosphors due to its distinctive brightness, nontoxicity, non-radioactivity, thermal and photostability, long-persistence time (>10 h), recyclability, and resistance to chemicals.…”

Section: Introductionmentioning

confidence: 99%

Development of Mechanically Reliable and Transparent Photochromic Film Using Solution Blowing Spinning Technology for Anti-Counterfeiting Applications

et al. 2021

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Photochromic materials have attracted broad interest to enhance the anti-counterfeiting of commercial products. In order to develop anti-counterfeiting mechanically reliable composite materials, it is urgent to improve the engineering process of both the material and matrix. Herein, we report on the development of anti-counterfeiting mechanically reliable nanocomposites composed of rare-earth doped aluminate strontium oxide phosphor (RESA) nanoparticles (NPs) immobilized into the thermoplastic polyurethane-based nanofibrous film successfully fabricated via the simple solution blowing spinning technology. The generated photochromic film exhibits an ultraviolet-stimulated anti-counterfeiting property. Different films of different emissive properties were generated using different total contents of RESA. Transmission electron microscopy was utilized to investigate the morphological properties of RESA NPs to display a particle diameter of 3–17 nm. The morphologies, compositions, optical transmittance, and mechanical performance of the produced photochromic nanofibrous films were investigated. Several analytical methods were employed, including energy-dispersive X-ray spectroscopy, scanning electron microscopy, and Fourier-transform infrared spectrometry. The fibrous diameter of RESA-TPU was in the range of 200–250 nm. In order to ensure the development of transparent RESA-TPU film, RESA must be prepared in the nanosized form to allow better dispersion without agglomeration in the TPU matrix. The luminescent RESA-TPU film displayed an absorbance intensity at 367 nm and two emission intensities at 431 and 517 nm. The generated RESA-TPU films showed an enhanced hydrophobicity without negatively influencing their original appearance and mechanical properties. Upon irradiation with ultraviolet light, the transparent nanofibrous films displayed rapid and reversible photochromism to greenish-yellow without fatigue. The produced anti-counterfeiting films demonstrated stretchable, flexible, and translucent properties. As a simple sort of anti-counterfeiting substrates, the current novel photochromic film provides excellent anti-counterfeiting strength at low-cost as an efficient method to develop versatile materials with high mechanical strength to create an excellent market as well as adding economic and social values.

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Section: Introductionmentioning

confidence: 99%

Development of Mechanically Reliable and Transparent Photochromic Film Using Solution Blowing Spinning Technology for Anti-Counterfeiting Applications

et al. 2021

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“…Alkaline earth metal oxide materials are endowed with long-lasting luminescent properties by codoping with dysprosium ions or any other metal ions . SrAl 2 O 4 : Eu 2+ , Dy 3+ (SAOED) is the most widely used RELM to obtain green light because of its excellent initial brightness and long afterglow . Sr 2 ZnSi 2 O 7 : Eu 2+ , Dy 3+ (SZSOED) and Y 2 O 2 S: Eu 3+ , Mg 2+ , Ti 4+ (YOSEMT) are the most prominent materials with blue and red emission, respectively. ,− In this study, SZSOED, SAOED, and YOSEMT are utilized as luminous species.…”

Section: Introductionmentioning

confidence: 99%

“…18 light because of its excellent initial brightness and long afterglow. 19 Sr 2 ZnSi 2 O 7 : Eu 2+ , Dy 3+ (SZSOED) and Y 2 O 2 S: Eu 3+ , Mg 2+ , Ti 4+ (YOSEMT) are the most prominent materials with blue and red emission, respectively. 16,20−22 In this study, SZSOED, SAOED, and YOSEMT are utilized as luminous species.…”

Section: Introductionmentioning

confidence: 99%

Soft, Stretchable, and Pneumatically Triggered Thermochromic Optical Filters with Embedded Phosphorescence

Yang

Baugh

Lin

et al. 2020

ACS Appl. Mater. Interfaces

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Phosphorescence is commonly used in nature to communicate using light. There are many ways to activate phosphorescence, including UV light, heat, and mechanical forces, but there are few methods to control phosphorescence once activated. Here, we present soft composite deviceswhich we call “optical filters”for controlling the release of light by phosphorescence within a stretchable matrix. The filters consist of liquid metal wires, phosphorescent particles, and thermochromic pigments embedded in an elastomeric matrix. UV light initially activates the phosphorescence of rare-earth long-lasting luminescent particles. At room temperature, the thermochromic pigments block the phosphorescence from leaving the matrix. However, Joule heating of the liquid metal can change the opacity of the thermochromic pigments, which tunes the color, intensity, and wavelength of phosphorescence that exits the composite. In addition, the resistance of the liquid metal wires changes with physical deformation, thereby converting mechanical forces (strain, compression, and pneumatic inflation) into an optical response. Controlled phosphorescence, combined with the electrical conductivity of the liquid metal and the overall soft matrix, enables potential applications as an electronic skin for soft robotics, stretchable electronics, and prosthetics.

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“…The alkaline earth aluminates have attracted a great attention as long afterglow materials because of their excellent photoluminescence, radiation intensity, color purity and good radiation resistance [1]. Especially, strontium aluminates codoped with europium and dysprosium are used in the many fields due to its excellent phosphorescence.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of Eu2+, Dy3+-Doped SrAl2O4 Synthesized by Hydrothermal Reaction and Its Photocatalytic Properties

Park¹

2018

MSCE

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Optimization and complexing agent-assisted synthesis of green SrAl 2 O 4 : Eu 2+ , Dy 3+ phosphors through sol–gel process

Cited by 40 publications

References 33 publications

Development of Mechanically Reliable and Transparent Photochromic Film Using Solution Blowing Spinning Technology for Anti-Counterfeiting Applications

Development of Mechanically Reliable and Transparent Photochromic Film Using Solution Blowing Spinning Technology for Anti-Counterfeiting Applications

Soft, Stretchable, and Pneumatically Triggered Thermochromic Optical Filters with Embedded Phosphorescence

Characteristics of Eu<sup>2+</sup>, Dy<sup>3+</sup>-Doped SrAl<sub>2</sub>O<sub>4</sub> Synthesized by Hydrothermal Reaction and Its Photocatalytic Properties

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Optimization and complexing agent-assisted synthesis of green SrAl 2 O 4 : Eu 2+ , Dy 3+ phosphors through sol–gel process

Cited by 40 publications

References 33 publications

Development of Mechanically Reliable and Transparent Photochromic Film Using Solution Blowing Spinning Technology for Anti-Counterfeiting Applications

Development of Mechanically Reliable and Transparent Photochromic Film Using Solution Blowing Spinning Technology for Anti-Counterfeiting Applications

Soft, Stretchable, and Pneumatically Triggered Thermochromic Optical Filters with Embedded Phosphorescence

Characteristics of Eu&lt;sup&gt;2+&lt;/sup&gt;, Dy&lt;sup&gt;3+&lt;/sup&gt;-Doped SrAl&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;4&lt;/sub&gt; Synthesized by Hydrothermal Reaction and Its Photocatalytic Properties

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Characteristics of Eu<sup>2+</sup>, Dy<sup>3+</sup>-Doped SrAl<sub>2</sub>O<sub>4</sub> Synthesized by Hydrothermal Reaction and Its Photocatalytic Properties