Comparision of Photoluminescence studies of Lanthanum, Terbium doped Calcium Aluminate nanophosphors (CaAl 2 O 4 : La, CaAl 2 O 4 : Tb) by sol-gel method.

Freeda, M.; Subash, T.D.

doi:10.1016/j.matpr.2017.02.134

Cited by 8 publications

(8 citation statements)

References 21 publications

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“…This finding demonstrated that the major element of the composite film was TiN under the present preparation conditions and parameters. The lattice constant of TiN crystalline is calculated using Bragg's Equation (1) and cubic system interplanar distance Equation (2) [35]:…”

Section: Test Results and Analysis Of The Sample Structuresmentioning

confidence: 99%

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Effect of TiN/C Microstructure Composite Layer on the Adhesion of FDLC Film onto Silicon Substrate

Xiao

Gong

et al. 2018

Coatings

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Deposition techniques of direct current and radio-frequency magnetron sputtering were used to separately prepare TiN/C microstructural composite layer and fluorinated diamond-like carbon (FDLC) film on monocrystalline silicon. The aim was to investigate the effects of microstructural composite layers on the adhesion property of FDLC film. The results indicated that the TiN/C microstructural composite layer can distinguish from the substrate and the FDLC film. After adding the composite layers, the film-substrate binding force significantly increased. When the composite film were prepared at a partial pressure of 0.25, the binding force reached 30.5 N, which was greater than the value of 22.6 N for the sample without composite layers. TiN/C in the composite layers intensified the integration with silicon substrate because the C-C bond acted as a bridge linking the FDLC film to the silicon substrate. Furthermore, the bulges on the surface of the composite layers strengthened the physical bonding of the film with silicon substrates.

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Section: Test Results and Analysis Of The Sample Structuresmentioning

confidence: 99%

“…According to the reference [36][37][38][39], peak C1s can be The lattice constant of TiN crystalline is calculated using Bragg's Equation (1) and cubic system interplanar distance Equation (2) [35]:…”

Section: Test Results and Analysis Of The Sample Structuresmentioning

confidence: 99%

Effect of TiN/C Microstructure Composite Layer on the Adhesion of FDLC Film onto Silicon Substrate

Xiao

Gong

et al. 2018

Coatings

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“…For example, Tb 3+ , which has been doped into CaAl 2 O 4 in several studies, can substitute a Ca 2+ ion as Eu 2+ , which is followed by the formation of a charge defect [ 85 ]; CaAl 2 O 4 :Tb 3+ was found to exhibit an emission wavelength of 545 nm, which corresponded to the f-f transitions of Tb 3+ . La 3+ -doped CaAl 2 O 4 synthesized via the sol–gel method exhibited an emission peak at 395 nm in the blue region [ 79 ]; its emission band intensity was observed to be stronger than that of CaAl 2 O 4 :Tb 3+ . The particle sizes of CaAl 2 O 4 :La 3+ and CaAl 2 O 4 :Tb 3+ were obtained as 27 nm and 31 nm, respectively, and both had no effect on the phase composition of CaAl 2 O 4 [ 79 ].…”

Section: Calcium Aluminate Phosphorsmentioning

confidence: 99%

“…La 3+ -doped CaAl 2 O 4 synthesized via the sol–gel method exhibited an emission peak at 395 nm in the blue region [ 79 ]; its emission band intensity was observed to be stronger than that of CaAl 2 O 4 :Tb 3+ . The particle sizes of CaAl 2 O 4 :La 3+ and CaAl 2 O 4 :Tb 3+ were obtained as 27 nm and 31 nm, respectively, and both had no effect on the phase composition of CaAl 2 O 4 [ 79 ]. Additionally, several studies have attempted the Ce 3+ ion doping of CaAl 2 O 4 and have resulted in a much shorter emission wavelength (330–350 nm).…”

Section: Calcium Aluminate Phosphorsmentioning

confidence: 99%

“…Lin et al suggested that the incorporation of Dy 3+ , Nd 3+ , and La 3+ can possibly enhance the brightness and persistent afterglow time [82]. Regardless of the type of codo- [79]. Additionally, several studies have attempted the Ce 3+ ion doping of CaAl 2 O 4 and have resulted in a much shorter emission wavelength (330-350 nm).…”

Section: Codoping Of Calcium Aluminate Phosphors With Various Trivalent Lanthanide Ionsmentioning

confidence: 99%

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Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Kim

2021

Nanomaterials

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Lanthanide-activated alkaline earth aluminate phosphors are excellent luminescent materials that are designed to overcome the limitations of conventional sulfide-based phosphors. The increasing research attention on these phosphors over the past decade has led to a drastic improvement in their phosphorescence efficiencies and resulted in a wide variety of phosphorescence colors, which can facilitate applications in various areas. This review article discusses the development of lanthanide-activated alkaline earth aluminate phosphors with a focus on the various synthesis methods, persistent luminescence mechanisms, activator and coactivator effects, and the effects of compositions. Particular attention has been devoted to alkaline earth aluminate phosphors that are extensively used, such as strontium-, calcium-, and barium-based aluminates. The role of lanthanide ions as activators and coactivators in phosphorescence emissions was also emphasized. Finally, we address recent techniques involving nanomaterial engineering that have also produced lanthanide-activated alkaline earth aluminate phosphors with long-persistent luminescence.

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Investigation of lanthanum substitution effects in yttrium aluminium garnet: importance of solid state NMR and EPR methods

Laurikenas

Sakalauskas

Maršalka

et al. 2020

J Sol-Gel Sci Technol

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In this study yttrium aluminium garnet (YAG) specimens in which yttrium was partially substituted by lanthanum Y3-xLaxAl5O12 (YLaAG) were prepared by an aqueous sol-gel method. The resulting sol was concentrated by slow solvent evaporation at 65 oC. The obtained gels were dried in an oven at 120 oC for 24 h. The obtained precursor gel powders were calcined at 800 oC and 1000 oC in air. YLaAG samples were analyzed by X-ray diffraction (XRD), solid state nuclear magnetic resonance (NMR), scanning electron microscopy (SEM) and electron paramagnetic resonance (EPR) methods. Luminescence measurements of YLaAG samples were also recorded. The XRD analysis results showed that only low substitution of yttrium by lanthanum is possible in Y3-xLaxAl5O12 without destroying garnet crystal structure. It was also demonstrated in this study, that solid state NMR and EPR methods are indispensable tools for the explanation of processes and properties observed in the newly synthesized Y3-xLaxAl5O12 compounds.

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Comparision of Photoluminescence studies of Lanthanum, Terbium doped Calcium Aluminate nanophosphors (CaAl 2 O 4 : La, CaAl 2 O 4 : Tb) by sol-gel method.

Cited by 8 publications

References 21 publications

Effect of TiN/C Microstructure Composite Layer on the Adhesion of FDLC Film onto Silicon Substrate

Effect of TiN/C Microstructure Composite Layer on the Adhesion of FDLC Film onto Silicon Substrate

Recent Developments in Lanthanide-Doped Alkaline Earth Aluminate Phosphors with Enhanced and Long-Persistent Luminescence

Investigation of lanthanum substitution effects in yttrium aluminium garnet: importance of solid state NMR and EPR methods

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