Luminescent, Scintillation, and Photoconversion Properties of Micro-Pulling-Down-Grown Single Crystals of Ce3+-Doped Gd3-xLuxAl5-yGayO12 Garnets

被引：4
|
作者：
Gieszczyk, Wojciech [1 ]
Bilski, Pawel [1 ]
Mrozik, Anna [1 ]
Fedorov, Alexander [2 ]
Markovskyi, Anton [3 ]
Zorenko, Tetiana [3 ]
Zorenko, Yuriy [3 ]
机构：
[1] Polish Acad Sci, Inst Nucl Phys, PL-31342 Krakow, Poland
[2] Natl Acad Sci Ukraine, SSI Inst Single Crystals, Ave Nauki 60, UA-61178 Kharkov, Ukraine
[3] Kazimierz Wielki Univ Bydgoszcz, Inst Phys, Powstancow Wielkopolskich Str 2, PL-85090 Bydgoszcz, Poland
来源：
PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS | 2020年 / 257卷 / 08期
关键词：
Ce3+ dopants; micro-pulling-down growth method; mixed garnets; phosphor-converted white light-emitting diodes; scintillators; single crystals; ENERGY-TRANSFER PROCESSES; CE3+; TEMPERATURE; PHOSPHORS; LIGHT;
D O I：
10.1002/pssb.201900429
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
Herein, the development of phosphor-converted white light-emitting diodes (pc-WLED) and scintillators based on the crystals of Ce3+-doped multicomponent garnets, grown by the micro-pulling-down (MPD) method is studied. The combined technique of the "bandgap engineering" and "positioning of Ce3+ 5d-levels" is applied to the crystals of Gd3-xLuxAl5-yGayO12 (x = 0-1.5 and y = 2-3) mixed garnets for improving their color-rending properties in pc-WLEDs application as well as their scintillation figure of merit. The absorption, cathodoluminescence, photoluminescence, photoconversion (PC), and also the scintillation light yield and scintillation decay time measurements under excitation by alpha-particles of Pu-239 radioisotope are used for the characterization of the crystals. Among all the investigated garnet compounds, the best photoconverting properties are observed in Gd3-1.5Lu0-1.5Al5-yGayO12:Ce crystals at x = 0-1.5 and y = 2.5-3. Meanwhile, the best scintillation characteristics are found in Gd3-xLuxAl5-yGayO12 crystals at x = 0-1.5 and y = 2-2.5.
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页数：10
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