Influence of Er3+ ion concentration on optical and photoluminescence properties of Er3+-doped gadolinium-calcium silica borate glasses

2016 ◽  
Vol 683 ◽  
pp. 590-598 ◽  
Author(s):  
C.R. Kesavulu ◽  
H.J. Kim ◽  
S.W. Lee ◽  
J. Kaewkhao ◽  
N. Wantana ◽  
...  
Keyword(s):  
Ion Concentration ◽  
Borate Glasses ◽  
Photoluminescence Properties

Enhanced Photoluminescence of YInGe2O7:Eu3+,Li+ Phosphor Prepared Using the Solid-State Method

2013 ◽  
Vol 684 ◽  
pp. 274-278
Author(s):  
Huang Yu Chen ◽  
Ru Yuan Yang ◽  
Shoou Jinn Chang
Keyword(s):  
Solid State ◽  
Red Light ◽  
Broad Band ◽  
Lithium Carbonate ◽  
Ion Concentration ◽  
Photoluminescence Intensity ◽  
Photoluminescence Properties ◽  
Solid State Method ◽  
Enhanced Photoluminescence ◽  
Transfer State

A Eu3+ activated YInGe2O7phosphor was synthesized by solid-state reaction and lithium carbonate was added to change the morphology and photoluminescence properties. Scanning electron microscopy showed large particle size and necking shape were obtained as the concentrations of Li+ ions increase. In the PL studies, the excitation spectrum of YInGe2O7:Eu3+ phosphors exhibited a broad band in the UV region centered at about 272 nm attributed to charge transfer state (CTS) band, which has a little shift after Li+ ion was added. As the Li+ ion concentration increased, the photoluminescence intensity of the red emission at 620 nm of Eu3+ ions was enhanced, and the optimized concentration of of added Li+ ion is 0.05. The results showed that addition of Li+ ion allows YInGe2O7:Eu3+ phosphors emitting relatively pure red light.

FTIR SPECTRAL ANALYSIS ON HEAVY METAL BORATE GLASSES

2006 ◽  
Vol 20 (10) ◽  
pp. 533-538 ◽  
Author(s):  
B. KARTHIKEYAN
Keyword(s):  
Heavy Metal ◽  
Spectral Analysis ◽  
Structural Analysis ◽  
Transition Metal ◽  
Metal Ion ◽  
Ion Concentration ◽  
Borate Glasses ◽  
Melt Quenching ◽  
Ftir Spectral Analysis ◽  
Metal Borate

Inorganic heavy metal borate glasses were prepared through the melt quenching technique. Two sets of glasses were prepared, the compositions are (wt.%) 35 Bi 2 O 3+(50-x) B 2 O 3+15 Na 2 O +x PbO , where x=0, 10, 20, 30 and 35 MO +30 Na 2 O +35 B 2 O 3 ( MO = Bi 2 O 3, PbO , ZnO ). The FTIR structural analysis was made. These glasses have different borate groups and it mainly depends on the modifier/metal ion concentration. The influence of heavy metal and transition metal ion on the borate network were also identified.

Mixed alkali effects in Er 3+ ‐doped borate glasses: Influence on physical, mechanical, and photoluminescence properties

2019 ◽  
Vol 102 (8) ◽  
pp. 4562-4572 ◽  
Author(s):  
Qingliu Hu ◽  
Tongyao Wang ◽  
Yushi Chu ◽  
Xin Wang ◽  
Yanqiu Du ◽  
...  
Keyword(s):  
Borate Glasses ◽  
Photoluminescence Properties ◽  
Mixed Alkali

scholarly journals Influence of Terbium Ions and Their Concentration on the Photoluminescence Properties of Hydroxyapatite for Biomedical Applications

Nanomaterials ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 2442
Author(s):  
Andrei Viorel Paduraru ◽  
Ovidiu Oprea ◽  
Adina Magdalena Musuc ◽  
Bogdan Stefan Vasile ◽  
Florin Iordache ◽  
...  
Keyword(s):  
Biomedical Applications ◽  
Fluorescent Microscopy ◽  
Luminescent Properties ◽  
Ion Concentration ◽  
Biomedical Science ◽  
Infrared Spectrometry ◽  
Photoluminescence Properties ◽  
Potential Applications ◽  
Tem Microscopy ◽  
New Generation

A new generation of biomaterials with terbium-doped hydroxyapatite was obtained using a coprecipitation method. The synthesis of new materials with luminescent properties represents a challenging but important contribution due to their potential applications in biomedical science. The main objective of this study was to revel the influence of terbium ions on the design and structure of hydroxyapatite. Different concentrations of terbium, described by the chemical formula Ca10−xTbx(PO4)6(OH)2, where x is in the range of 0 to 1, were considered. The consequence of ion concentration on hydroxyapatite morphology was also investigated. The morphology and structure, as well as the optical properties, of the obtained nanomaterials were characterized using X-ray powder diffraction analysis (XRD), Fourier Transform Infrared spectrometry (FTIR), SEM and TEM microscopy, UV-Vis and photoluminescence spectroscopies. The measurements revealed that terbium ions were integrated into the structure of hydroxyapatite within certain compositional limits. The biocompatibility and cytotoxicity of the obtained powders evaluated using MTT assay, oxidative stress assessment and fluorescent microscopy revealed the ability of the synthesized nanomaterials to be used for biological system imaging.

scholarly journals Fabrication and Characterization of Sm3+ Doped Zinc Barium Borate Glasses

2018 ◽  
Vol 63 (7) ◽  
pp. 608
Author(s):  
Y. Yamsuk ◽  
P. Yasaka ◽  
N. Sangwaranatee ◽  
J. Keawkao
Keyword(s):  
Transition Probabilities ◽  
Emission Cross Section ◽  
Radiative Transition ◽  
Ion Concentration ◽  
Borate Glasses ◽  
Barium Borate ◽  
Photoluminescence Spectra ◽  
Intensity Parameters ◽  
Fabrication And Characterization

Zinc-barium-borate glasses with the composition (60 − x)B2O3–10ZnO–30BaO–xSm2O3 (where x = 0.5, 1.0, 1.5, 2.0 and 2.5 mol %) doped with Sm3+ ions have been prepared, and their physical and optical properties are investigated. The photoluminescence spectra recorded under the 403-nm excitation exhibited the emission bands at 564, 600, 647, and 710 nm corresponding to the transition 4 G5/2 →6 Hj (j = 5/2, 7/2, 9/2, 11/2), respectively. Judd–Ofelt intensity parameters (Ωl, l = 2, 4 and 6) have been evaluated, and the radiative transition probabilities, emission cross-section, and branching ratios for the excited levels of Sm3+ ionsare predicted. The lifetime of the 4 G5/2 level is found to decrease with an increase in the Sm3+ ion concentration.

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