Optical and luminescence properties of Co:AgCl0.2Br0.8 crystals and their potential applications as gain media for middle-infrared lasers

2011 ◽  
Vol 99 (20) ◽  
pp. 201111 ◽  
Author(s):  
I. Zakosky-Neuberger ◽  
I. Shafir ◽  
L. Nagli ◽  
A. Katzir
Keyword(s):  
Luminescence Properties ◽  
Infrared Lasers ◽  
Potential Applications ◽  
Middle Infrared ◽  
Gain Media

scholarly journals Enhanced luminescence properties of Ca1+xSr2−xAl2O6:Eu3+ (0 ≤ x ≤ 1) red phosphors based on composition modulation

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12981-12989
Author(s):  
Biao Shen ◽  
Jianghang Xu ◽  
Qinan Mao ◽  
Jiasong Zhong
Keyword(s):  
Optical Properties ◽  
Quantum Efficiency ◽  
Luminescence Properties ◽  
Composition Modulation ◽  
Red Phosphors ◽  
Potential Applications ◽  
Enhanced Luminescence

A series of Ca1+xSr2−xAl2O6:Eu3+ (0 ≤ x ≤ 1) red-emitting phosphors with adjustable optical properties and excellent quantum efficiency was developed for potential applications in warm WLEDs.

scholarly journals The Effect of Ionising Radiation on the Luminescence Properties of Fluoroperovskites

2021 ◽  
Author(s):  
◽  
Joseph Schuyt
Keyword(s):  
Energy Levels ◽  
Thermal Quenching ◽  
Ionising Radiation ◽  
Luminescence Properties ◽  
Readout System ◽  
Tissue Equivalent ◽  
Potential Applications ◽  
Radiation Induced ◽  
Medical Dosimetry ◽  
Physical Phenomena

<p>The luminescence of crystalline compounds can be used to monitor many physical phenomena, including doses of ionising radiation. Optically stimulated luminescence (OSL), thermoluminescence (TL), and radiophotoluminescence (RPL) have been successfully employed in dosimetry. However, few materials possess both the structural and luminescence properties required for medical dosimetry. This thesis aimed to investigate the luminescence features of the class of compounds known as fluoroperovskites. Emphasis was placed on studying the effects of irradiation on the luminescence properties, such that the compounds could be evaluated regarding potential applications in clinical dosimetry. Samples were primarily characterised using photoluminescence (PL), radioluminescence (RL), OSL, RPL, TL, and transmittance spectroscopy.  OSL was observed in the majority of samples due to the existence of electron trapping F-type centres. F-centre/Mn complexes were observed in all AMgF3:Mn compounds after irradiation and the energy levels of the complexes in each compound were experimentally determined. The most promising potential dosimeter host material was the near tissue-equivalent NaMgF3. When doped with Mn2+, the compound exhibited RPL via the formation of F-centre/Mn complexes and OSL via several trapping centres. The RPL could be probed independently to the OSL such that the compound could function as a hybrid OSL/RPL dosimeter. In the NaMgF3:Ln compounds, RPL occurred via the radiation-induced reduction Ln3+ → Ln2+ for Ln = Sm, Dy, and Yb. The reduction Sm3+ → Sm2+ was highly stable and could be non-destructively probed independently to the OSL. The Sm doped compound also exhibited radiation-induced conductivity that could be coupled with the RL, such that the compound could function as a real-time hybrid optical/electrical dosimeter. Charge kinetics, thermal quenching, and binding energy models were developed and applied to the compounds.   Finally, a two-dimensional readout system was designed and constructed. The capabilities of the system were evaluated using the OSL of NaMgF3:Eu and NaMgF3:Mn. Sensitivities to doses from < 10 mGy to > 1 Gy were obtained along with sub-millimetre spatial resolutions.</p>

Double perovskite A2LaNbO6:Mn4+,Eu3+ (A = Ba, Ca) phosphors: potential applications in optical temperature sensing

2019 ◽  
Vol 48 (27) ◽  
pp. 10062-10069 ◽  
Author(s):  
Peng Wang ◽  
Jiashan Mao ◽  
Lu Zhao ◽  
Bin Jiang ◽  
Chunyan Xie ◽  
...  
Keyword(s):  
Double Perovskite ◽  
Temperature Sensing ◽  
Luminescence Properties ◽  
Potential Applications ◽  
Mn Doped

The study of the luminescence properties of Mn-doped double perovskite phosphors shows that they have potential applications in optical temperature sensing.

scholarly journals The Effect of Ionising Radiation on the Luminescence Properties of Fluoroperovskites

2021 ◽  
Author(s):  
◽  
Joseph Schuyt
Keyword(s):  
Energy Levels ◽  
Thermal Quenching ◽  
Ionising Radiation ◽  
Luminescence Properties ◽  
Readout System ◽  
Tissue Equivalent ◽  
Potential Applications ◽  
Radiation Induced ◽  
Medical Dosimetry ◽  
Physical Phenomena

<p>The luminescence of crystalline compounds can be used to monitor many physical phenomena, including doses of ionising radiation. Optically stimulated luminescence (OSL), thermoluminescence (TL), and radiophotoluminescence (RPL) have been successfully employed in dosimetry. However, few materials possess both the structural and luminescence properties required for medical dosimetry. This thesis aimed to investigate the luminescence features of the class of compounds known as fluoroperovskites. Emphasis was placed on studying the effects of irradiation on the luminescence properties, such that the compounds could be evaluated regarding potential applications in clinical dosimetry. Samples were primarily characterised using photoluminescence (PL), radioluminescence (RL), OSL, RPL, TL, and transmittance spectroscopy.  OSL was observed in the majority of samples due to the existence of electron trapping F-type centres. F-centre/Mn complexes were observed in all AMgF3:Mn compounds after irradiation and the energy levels of the complexes in each compound were experimentally determined. The most promising potential dosimeter host material was the near tissue-equivalent NaMgF3. When doped with Mn2+, the compound exhibited RPL via the formation of F-centre/Mn complexes and OSL via several trapping centres. The RPL could be probed independently to the OSL such that the compound could function as a hybrid OSL/RPL dosimeter. In the NaMgF3:Ln compounds, RPL occurred via the radiation-induced reduction Ln3+ → Ln2+ for Ln = Sm, Dy, and Yb. The reduction Sm3+ → Sm2+ was highly stable and could be non-destructively probed independently to the OSL. The Sm doped compound also exhibited radiation-induced conductivity that could be coupled with the RL, such that the compound could function as a real-time hybrid optical/electrical dosimeter. Charge kinetics, thermal quenching, and binding energy models were developed and applied to the compounds.   Finally, a two-dimensional readout system was designed and constructed. The capabilities of the system were evaluated using the OSL of NaMgF3:Eu and NaMgF3:Mn. Sensitivities to doses from < 10 mGy to > 1 Gy were obtained along with sub-millimetre spatial resolutions.</p>

Use of BeO in middle-infrared lasers

1985 ◽  
Vol 15 (11) ◽  
pp. 1551-1553
Author(s):  
A E Belyanko ◽  
V A Vasil'ev ◽  
Vitalii I Konov ◽  
N I Lipatov ◽  
V L Maslennikov ◽  
...  
Keyword(s):  
Infrared Lasers ◽  
Middle Infrared

Luminescence properties of Pr3+ doped (Y0.9La0.1)2O3 transparent ceramics for potential applications in white LEDs and scintillators

2018 ◽  
Vol 194 ◽  
pp. 452-455 ◽  
Author(s):  
Yan Sun ◽  
Qiuhong Yang ◽  
Hongqiang Wang ◽  
Xiaobo Jiang ◽  
Bingfeng Li ◽  
...  
Keyword(s):  
Luminescence Properties ◽  
Transparent Ceramics ◽  
White Leds ◽  
Potential Applications

scholarly journals Layered exfoliable crystalline materials based on Sm-, Eu- and Eu/Gd-2-phenylsuccinate frameworks. Crystal structure, topology and luminescence properties

2015 ◽  
Vol 44 (7) ◽  
pp. 3417-3429 ◽  
Author(s):  
G. E. Gomez ◽  
M. C. Bernini ◽  
E. V. Brusau ◽  
G. E. Narda ◽  
D. Vega ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Thin Films ◽  
Luminescence Properties ◽  
Crystalline Materials ◽  
Structure Topology ◽  
Potential Applications

New layered 2D MOFs based on 2-phenylsuccinate, Sm, Eu and Eu/Gd are a suitable platform for obtaining exfoliatable frameworks with luminescence properties for potential applications as thin films.

scholarly journals Preparation, characterization and luminescence properties of core–shell ternary terbium composites SiO 2(600) @Tb(MABA-Si)•L

2018 ◽  
Vol 5 (3) ◽  
pp. 171655 ◽  
Author(s):  
Yang-Yang Ma ◽  
Wen-Xian Li ◽  
Yu-Shan Zheng ◽  
Jin-Rong Bao ◽  
Yi-Lian Li ◽  
...  
Keyword(s):  
Shell Structure ◽  
Luminescence Decay ◽  
Luminescence Properties ◽  
Core Shell ◽  
Element Analysis ◽  
Strong Emission ◽  
The Core ◽  
Potential Applications ◽  
Core Shell Structure ◽  
Terbium Complexes

Two novel core–shell structure ternary terbium composites SiO 2(600) @Tb(MABA-Si)·L(L:dipy/phen) nanometre luminescence materials were prepared by ternary terbium complexes Tb(MABA-Si)·L 2 ·(ClO 4 ) 3 ·2H 2 O shell grafted onto the surface of SiO 2 microspheres. And corresponding ternary terbium complexes were synthesized using (CONH(CH 2 ) 3 Si(OCH 2 CH 3 ) 3 ) 2 (denoted as MABA-Si) as first ligand and L as second ligand coordinated with terbium perchlorate. The as-synthesized products were characterized by means of IR spectra, 1 HNMR, element analysis, molar conductivity, SEM and TEM. It was found that the first ligand MABA-Si of terbium ternary complex hydrolysed to generate the Si–OH and the Si–OH condensate with the Si–OH on the surface of SiO 2 microspheres; then ligand MABA-Si grafted onto the surface of SiO 2 microspheres. The diameter of SiO 2 core of SiO 2(600) @Tb(MABA-Si)·L was approximately 600 nm. Interestingly, the luminescence properties demonstrate that the two core–shell structure ternary terbium composites SiO 2(600) Tb(MABA-Si)·L(dipy/phen) exhibit strong emission intensities, which are 2.49 and 3.35 times higher than that of the corresponding complexes Tb(MABA-Si)·L 2 ·(ClO 4 ) 3 ·2H 2 O, respectively. Luminescence decay curves show that core–shell structure ternary terbium composites have longer lifetime. Excellent luminescence properties enable the core–shell materials to have potential applications in medicine, industry, luminescent fibres and various biomaterials fields.

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