Determination of Judd–Ofelt intensity parameters from the excitation spectra for rare-earth doped luminescent materials

2010 ◽  
Vol 12 (13) ◽  
pp. 3276 ◽  
Author(s):  
Wenqin Luo ◽  
Jinsheng Liao ◽  
Renfu Li ◽  
Xueyuan Chen
Keyword(s):  
Rare Earth ◽  
Luminescent Materials ◽  
Excitation Spectra ◽  
Intensity Parameters ◽  
Rare Earth Doped

A highly efficient, orange light-emitting (K0.5Na0.5)NbO3:Sm3+/Zr4+ lead-free piezoelectric material with superior water resistance behavior

2015 ◽  
Vol 3 (20) ◽  
pp. 5275-5284 ◽  
Author(s):  
Qiwei Zhang ◽  
Ke Chen ◽  
Leilei Wang ◽  
Haiqin Sun ◽  
Xusheng Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Piezoelectric Material ◽  
Water Resistance ◽  
Lead Free ◽  
Luminescent Materials ◽  
Light Emitting ◽  
Highly Efficient ◽  
Potential Applications ◽  
Rare Earth Doped ◽  
Multifunctional Devices

Multifunctional luminescent materials based on rare earth doped ferro-/piezoelectrics have attracted much attention due to their potential applications in novel multifunctional devices.

High Resolution Time and Frequency Resolved Spectroscopy for the Study of Photophysical Processes in Luminescent Materials

1999 ◽  
Vol 560 ◽  
Author(s):  
Bruce Farris ◽  
Anthony Smith ◽  
Richard Martoglio ◽  
Lee H. Spangler
Keyword(s):  
Fourier Transform ◽  
Rare Earth ◽  
Temporal Resolution ◽  
Luminescent Materials ◽  
Resolution Time ◽  
Experiment Data ◽  
Single Experiment ◽  
Crystalline Materials ◽  
Photophysical Processes ◽  
Rare Earth Doped

ABSTRACTA method for obtaining time and frequency resolved spectra with high spectral and temporal resolution over a broad spectral range is presented. Step – scan Fourier transform spectroscopy permits spectral coverage from UV to mid IR with sub nanosecond resolution making it possible to track emission from multiple manifolds with full temporal resolution in a single experiment. Data for several rare-earth doped crystalline materials exhibiting multiple emission bands and including evidence of energy transfer is shown.

The Effect of Nd3+ Composition on Judd-Ofelt Analysis of Lithium Niobate Tellurite Glasses Codoped with Er3+

2017 ◽  
Vol 268 ◽  
pp. 191-197 ◽  
Author(s):  
Nurhafizah Hasim ◽  
Md Supar Rohani
Keyword(s):  
Rare Earth ◽  
Glass Network ◽  
Rare Earth Ions ◽  
Oscillator Strengths ◽  
Tellurite Glasses ◽  
Melt Quenching ◽  
Intensity Parameters ◽  
Doped Glasses ◽  
Rare Earth Doped ◽  
Covalent Nature

The modification of absorption characteristics in rare-earth doped tellurite glasses is important in photonics application. The Er3+/Nd3+ doped glasses of the form (69-x)TeO2–15Li2CO3–15Nb2O5–1Er2O3 -(x)Nd2O3 with x =0.2 and 0.6 mol% are successfully made by using conventional melt-quenching technique. The Judd-Ofelt analysis is to determine the local structure and bonding in the vicinity of rare-earth ions. The oscillator strengths are calculated from the absorption spectra and used to evaluate Judd-Ofelt intensity parameters (Ωλ, λ=2, 4 and 6). The values of Ω4 and Ω6 change with the increase of Nd3+ concentration is ascribed to the change in glass network structures. The values of Ω2 are increased from 1.53 to 37.13 (10-22) cm2 with the increase of Nd3+ concentration which indicate an increase in the covalent nature of Nd-O bond and less centrosymmetrical the ion sites. The decrease in τrad for each level with the increase of Nd3+ concentration signifies on how fast a particular level gets depopulated. The values of β for the transitions 4G5/2, 2G7/2 → 4I9/2, 2H11/2 → 4I9/2 and 4F9/2 → 4I9/2 are found to lie in between 99.6 to 100.0%.

Luminescence Studies of Eu3+ Doped Calcium Bromofluoride Phosphor

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
Jagjeet Kaur ◽  
Yogita Parganiha ◽  
Vikas Dubey
Keyword(s):  
Rare Earth ◽  
Light Emission ◽  
Red Light ◽  
Broad Band ◽  
Solid State Reaction Method ◽  
Glow Peak ◽  
Prepared Phosphor ◽  
Excitation Spectra ◽  
Display Devices ◽  
Rare Earth Doped

The present paper reports photoluminescence (PL) and thermoluminescence (TL) properties of rare earth-doped calcium bromo-fluoride phosphor. The europium (Eu3+) was used as rare earth dopant. The phosphor was prepared by Solid state reaction method (conventional method). The PL emission spectrum of the prepared phosphor shows intense peaks in the red region at 611 nm for 5D0→7F2 transitions, and the PL excitation spectra show a broad band located around 220–400 nm for the emission wavelength fixed at 470 nm. The TL studies were carried out after irradiating the phosphor by UV rays with different exposure time. The glow peak shows second-order kinetics. The present phosphor can act as host for red light emission in display devices.

scholarly journals Sensing applications of rare-earth-doped luminescent materials

1988 ◽  
Author(s):  
S. W. Allison ◽  
M. R. Cates ◽  
M. L. Simpson ◽  
B. W. Noel ◽  
D. Turley ◽  
...  
Keyword(s):  
Rare Earth ◽  
Luminescent Materials ◽  
Sensing Applications ◽  
Rare Earth Doped
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