Microwave sol–gel synthesis and upconversion photoluminescence properties of CaGd2(WO4)4:Er3+/Yb3+ phosphors with incommensurately modulated structure

Lim, Chang Sung; Aleksandrovsky, A.S.; Molokeev, Maxim S.; Oreshonkov, Aleksandr S.; Atuchin, Victor V.

doi:10.1016/j.jssc.2015.04.032

Cited by 164 publications

(58 citation statements)

References 64 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, the volatile and thermal unstable compound can be embedded within the sol–gel matrix because sol–gel is a low temperature processing procedure . However, the disadvantage is the long gelation time …”

Section: Fabrication Of Micro‐/nanostructurementioning

confidence: 99%

Micro‐/Nanostructured Interface for Liquid Manipulation and Its Applications

Duan

Zheng

Zhao

et al. 2019

Small

View full text Add to dashboard Cite

Understanding the relationship between liquid manipulation and micro‐/nanostructured interfaces has gained much attention due to the wide potential applications in many fields, such as chemical and biomedical assays, environmental protection, industry, and even daily life. Much work has been done to construct various materials with interfacial liquid manipulation abilities, leading to a range of interesting applications. Herein, different fabrication methods from the top‐down approach to the bottom‐up approach and subsequent surface modifications of micro‐/nanostructured interfaces are first introduced. Then, interactions between the surface and liquid, including liquid wetting, liquid transportation, and a number of corresponding models, together with the definition of hydrophilic/hydrophobic, oleophilic/olephobic, the definition and mechanism of superwetting, including superhydrophobicity, superhydrophilicity, and superoleophobicity, are presented. The micro‐/nanostructured interface, with major applications in self‐cleaning, antifogging, anti‐icing, anticorrosion, drag‐reduction, oil–water separation, water collection, droplet (micro)array, and surface‐directed liquid transport, is summarized, and the mechanisms underlying each application are discussed. Finally, the remaining challenges and future perspectives in this area are included.

show abstract

Section: Fabrication Of Micro‐/nanostructurementioning

confidence: 99%

Micro‐/Nanostructured Interface for Liquid Manipulation and Its Applications

Duan

Zheng

Zhao

et al. 2019

Small

View full text Add to dashboard Cite

show abstract

“…Previously, our research group has reported the incommensurately modulated structure of CaGd 2 (WO 4 ) 4 :Er 3+ /Yb 3+ phosphors induced by the difference of effective ionic radii of Yb 3+ , Er 3+ , and Gd 3+. Post heat‐treatment plays an important role in a well‐defined crystallized morphology. To achieve a well‐defined crystalline morphology of PbY 2 (MoO 4 ) 4 , PbY 1.8 (MoO 4 ) 4 :Er 0.2 , PbY 1.7 (MoO 4 ) 4 :Er 0.1 Yb 0.2 , and PbY 1.5 (MoO 4 ) 4 :Er 0.05 Yb 0.45 phases need to be heat treated at 900 °C for 16 h. It is assumed that the doping amount of Er 3+ /Yb 3+ has a great effect on the crystalline cell volume of the PbY 2 (MoO 4 ) 4 , because of the different ionic sizes and energy band gaps.…”

Section: Resultsmentioning

confidence: 99%

Upconversion Photoluminescence Properties of PbY₂(MoO₄)₄:Er³⁺/Yb³⁺ Phosphors Synthesized by Microwave Sol–Gel Method

Lim

2016

Bulletin Korean Chem Soc

Self Cite

View full text Add to dashboard Cite

PbY 2− x (MoO4 )4:Er3+/Yb3+ phosphors with the correct doping concentrations of Er3+ and Yb3+ (x = Er3+ + Yb3+, Er3+ = 0.05, 0.1, 0.2, and Yb3+ = 0.2, 0.45) were successfully synthesized using the microwave sol–gel method; their upconversion photoluminescence properties were investigated in detail. Well‐crystallized particles, formed after heat‐treatment at 900 °C for 16 h, showed a fine and homogeneous morphology with particle sizes of 2–5 µm. Under excitation at 980 nm, the PbY 1.7(MoO4 )4:Er0.1 Yb 0.2 and PbY 1.5(MoO4 )4:Er0.05 Yb 0.45 particles exhibited a strong 525‐nm emission band, a weak 550‐nm emission band in the green region, and a very weak 655‐nm emission band in the red region. The Raman spectra of the doped particles indicated the presence of strong peaks at higher and lower frequencies induced by disordered structures of PbY 2− x (MoO4 )4 by the incorporation of the Er3+ and Yb3+ ions into the crystal lattice, which resulted in the unit cell shrinkage accompanying the new phase formation of the MoO 4−x group.

show abstract

“…These results exhibit that the UC mechanism for the green and red emissions can be ascribed by a two-photon UC process in Ho +3 / Yb 3+ co-doped phosphors. 1,[9][10][11] Initially, the Yb 3+ ion sensitizer is excited from the 2 F 7/2 level to the 2 F 5/2 level under the excitation by 980 nm pumping, and transfers its energy to Ho 3+ ions. The UC emissions are generated by a two-photon process through excited state absorption (ESA) and energy transfer (ET).…”

Section: Resultsmentioning

confidence: 99%

“…1 These UC characteristics of the scheelite-structured compounds have current applications in many fields, including optoelectronic devices and luminescence imaging, due to their excellent UC luminescencent behaviors. 1 These UC characteristics of the scheelite-structured compounds have current applications in many fields, including optoelectronic devices and luminescence imaging, due to their excellent UC luminescencent behaviors.…”

mentioning

confidence: 99%

Synthesis of Microwave Sol–Gel Derived NaCaLa(WO₄)₃:Ho³⁺/Yb³⁺ Phosphors and Their Spectroscopic Properties

Lim

2016

Bulletin Korean Chem Soc

Self Cite

View full text Add to dashboard Cite

Ho 3+ /Yb 3+ co-doped NaCaLa 1−x (WO 4 ) 3 ternary tungstates with the proper concentrations of doping for Ho 3+ and Yb 3+ (x = Ho 3+ + Yb 3+ , Ho 3+ = 0, 0.05, 0.1, and 0.2, and Yb 3+ = 0, 0.2, and 0.45) were precisely synthesized using the sol-gel method assisted by the microwave technique; their upconverted spectroscopic properties were studied in detail. The particles provided well-crystallized morphology with a homogeneous and fine morphology, showing the grain sizes of 2-5 μm. After the low excitation at 980 nm, the NaCaLa 0.7 (WO 4 ) 3 :Ho 0.1 /Yb 0.2 and NaCaLa 0.5 (WO 4 ) 3 :Ho 0.05 /Yb 0.45 ternary tungstates provided strong upconverted yellow emissions, which are based on a strong green emission band of 545 nm and a strong red emission band of 655 nm. The optimal Yb 3+ :Ho 3+ ratio was obtained to be 9:1, as indicated by the composition-dependent quenching effect of Ho 3+ ions. The Raman spectra for the doped ternary tungstates showed the presence of strong peaks at higher frequencies, which were superimposed by strong Ho 3+ luminescence lines. The dependence of pump power and Commission Internationale de L'Eclairage (CIE) chromaticity of the upconverted emission intensity was investigated in detail.

show abstract

Microwave sol–gel synthesis and upconversion photoluminescence properties of CaGd2(WO4)4:Er3+/Yb3+ phosphors with incommensurately modulated structure

Cited by 164 publications

References 64 publications

Micro‐/Nanostructured Interface for Liquid Manipulation and Its Applications

Micro‐/Nanostructured Interface for Liquid Manipulation and Its Applications

Upconversion Photoluminescence Properties of PbY₂(MoO₄)₄:Er³⁺/Yb³⁺ Phosphors Synthesized by Microwave Sol–Gel Method

Synthesis of Microwave Sol–Gel Derived NaCaLa(WO₄)₃:Ho³⁺/Yb³⁺ Phosphors and Their Spectroscopic Properties

Contact Info

Product

Resources

About

Microwave sol–gel synthesis and upconversion photoluminescence properties of CaGd2(WO4)4:Er3+/Yb3+ phosphors with incommensurately modulated structure

Cited by 164 publications

References 64 publications

Micro‐/Nanostructured Interface for Liquid Manipulation and Its Applications

Micro‐/Nanostructured Interface for Liquid Manipulation and Its Applications

Upconversion Photoluminescence Properties of PbY2(MoO4)4:Er3+/Yb3+ Phosphors Synthesized by Microwave Sol–Gel Method

Synthesis of Microwave Sol–Gel Derived NaCaLa(WO4)3:Ho3+/Yb3+ Phosphors and Their Spectroscopic Properties

Contact Info

Product

Resources

About

Upconversion Photoluminescence Properties of PbY₂(MoO₄)₄:Er³⁺/Yb³⁺ Phosphors Synthesized by Microwave Sol–Gel Method

Synthesis of Microwave Sol–Gel Derived NaCaLa(WO₄)₃:Ho³⁺/Yb³⁺ Phosphors and Their Spectroscopic Properties