Ce:LaB3O6 glass for high-resolution radiation dosimetry

2022 ◽  
Author(s):  
Dongsheng Yuan ◽  
Encarnación G. Víllora ◽  
Takumi Kato ◽  
Daisuke Nakauchi ◽  
Takayuki YANAGIDA ◽  
...  
Keyword(s):  
High Resolution ◽  
Quantum Efficiency ◽  
Linear Dependence ◽  
Interatomic Distance ◽  
Irradiation Dose ◽  
Radiation Dosimetry ◽  
Dipole Interaction ◽  
Concentration Quenching ◽  
Optimum Concentration ◽  
Reducing Atmosphere

Abstract Ce:LaB3O6 (LBO) glass, whose constituents are abundant elements and fabrication is easy and cheap, is found to be a promising thermoluminescence (TL) dosimeter. This is originally achieved by CeF3 doping and melting under a reducing atmosphere, with the optimum concentration of 0.1% (quantum efficiency = 66%). The corresponding Ce interatomic distance is ~ 4 nm, below which concentration quenching occurs via Ce dipole-dipole interaction, as elucidated experimentally by Dexter’s theory. Ce:LBO exhibits a good dose resolution, with a linear dependence covering five orders of magnitude on both irradiation-dose and TL-response. Furthermore, it can be cyclically irradiated and read without degradation.

Photoluminescence Properties of SrSi2O2N2 Doped with Divalent Ytterbium Phosphor in Nitrogen-Rich Coordination

2017 ◽  
Vol 726 ◽  
pp. 266-270 ◽  
Author(s):  
Xi Guang Gu ◽  
Ren Li Fu ◽  
Fang Yang
Keyword(s):  
Band Gap ◽  
Optical Band Gap ◽  
Dipole Interaction ◽  
Solid State Reaction Method ◽  
Concentration Quenching ◽  
Luminescence Spectra ◽  
Photoluminescence Properties ◽  
Quenching Mechanism ◽  
Conventional Solid State Reaction ◽  
Reducing Atmosphere

Yb2+ -doped SrSi2O2N2 had been successfully synthesized using a conventional solid-state reaction method under reducing atmosphere. The phase and luminescence properties of the SrSi2O2N2 phosphors were investigated. Being an orange-red emitting phosphors, SrSi2O2N2:Yb was an emission peaking at 605 nm. With the increasing amount of Yb2+, the optical band gap of SrSi2O2N2 was decreased. The optical band gap of SrSi2O2N2 is decreased by Yb2+ increasing. The luminescence spectra of the nitrogen-rich coordination of Yb2+ in SrSi2O2N2 can be promoted. The concentration quenching mechanism of Yb2+ emission was responsible for the electric dipole–dipole interaction.

Synthesis, crystal structure and photoluminescence properties of Eu2+-activated RbCaGd(PO4)2 phosphors

RSC Advances ◽  
2016 ◽  
Vol 6 (14) ◽  
pp. 11211-11217 ◽  
Author(s):  
Xue Chen ◽  
Qidi Wang ◽  
Fengzhu Lv ◽  
Paul K. Chu ◽  
Yihe Zhang
Keyword(s):  
Crystal Structure ◽  
Sol Gel ◽  
Dipole Interaction ◽  
Concentration Quenching ◽  
Photoluminescence Properties ◽  
Gel Method ◽  
Sol Gel Method ◽  
First Time

RbCaGd(PO4)2:Eu2+ was prepared by the Pechini-type sol–gel method. The crystal structure was determined in the first time. The dipole–dipole interaction plays a major role in the mechanism of concentration quenching of Eu2+ in this phosphor.

scholarly journals Highly efficient red-emitting Ca2YSbO6:Eu3+ double perovskite phosphors for warm WLEDs

RSC Advances ◽  
2019 ◽  
Vol 9 (36) ◽  
pp. 20742-20748 ◽  
Author(s):  
Meijiao Liu ◽  
Biao Shen ◽  
Keyuan Wang ◽  
Jiasong Zhong ◽  
Daqin Chen
Keyword(s):  
Quantum Efficiency ◽  
Potential Application ◽  
Double Perovskite ◽  
Concentration Quenching ◽  
High Concentration ◽  
Highly Efficient ◽  
Red Emitting Phosphor

A double perovskite Ca2YSbO6:Eu3+ red-emitting phosphor with high concentration quenching and excellent quantum efficiency was developed to find a potential application in warm WLEDs.

Absolute thermal lens method to determine fluorescence quantum efficiency and concentration quenching of solids

1998 ◽  
Vol 57 (17) ◽  
pp. 10545-10549 ◽  
Author(s):  
M. L. Baesso ◽  
A. C. Bento ◽  
A. A. Andrade ◽  
J. A. Sampaio ◽  
E. Pecoraro ◽  
...  
Keyword(s):  
Quantum Efficiency ◽  
Thermal Lens ◽  
Concentration Quenching

Absolute quantum efficiency calibration of the AXAF High-Resolution Camera

1996 ◽  
Author(s):  
Ralph P. Kraft ◽  
John H. Chappell ◽  
Almus T. Kenter ◽  
K. Kobayashi ◽  
G. R. Meehan ◽  
...  
Keyword(s):  
High Resolution ◽  
Quantum Efficiency ◽  
Efficiency Calibration ◽  
Absolute Quantum

Luminescence Properties of a Novel Blue-Emitting Phosphor NaBaBO3:Tm3+,K+

2015 ◽  
Vol 833 ◽  
pp. 39-43 ◽  
Author(s):  
Jiang Hui Zheng ◽  
Qi Jin Cheng ◽  
Li Li Ying ◽  
Li Han Cai ◽  
Chao Chen
Keyword(s):  
Dipole Interaction ◽  
Solid State Reaction Method ◽  
Concentration Quenching ◽  
Luminescence Properties ◽  
Photoluminescence Intensity ◽  
Quenching Mechanism ◽  
Light Emitting ◽  
Near Ultraviolet ◽  
Chromaticity Coordinate ◽  
White Light Emitting Diodes

A novel blue-emitting phosphor NaBaBO3doped with Tm3+was prepared using a conventional high temperature solid-state reaction method. Its crystal structure and luminescence properties were studied. Photoluminescence measurements indicate that the phosphor features a satisfactory blue performance due to the1D2→3F4transition of Tm3+with the highest photoluminescence intensity located at 460 nm excited by 359 nm near-ultraviolet (NUV) light. In addition, the concentration of Tm3+was adjusted in order to obtain the optimum emission intensity. When the Tm3+concentration in NaBaBO3is 6.0 mol% the maximum intensity can be obtained. The concentration quenching occurs when Tm3+concentration is beyond 6.0 mol% and the concentration quenching mechanism can be explained by the dipole–dipole interaction. The measured chromaticity coordinate for the NaBaBO3:Tm3+phosphor under 359 nm excitation is determined to be (0.1470, 0.1090). The present work suggests that the NaBaBO3:Tm3+,K+phosphor is a promising blue-emitting material for NUV white light-emitting diodes.

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