Luminescence and photoconversion properties of Ce-doped Ca3Sc2Si3O12 crystal

被引：3
作者：
Shakhno, A. [1 ,2 ]
Gieszczyk, W.
Bilski, P. [3 ]
Witkiewicz-Lukaszek, S. [1 ]
Zorenko, Tetiana [1 ]
Cieszko, M. [2 ]
Szczepa, Z.
Kotlov, A. [4 ]
Zorenko, Yu [1 ]
机构：
[1] Kazimierz Wielki Univ Bydgoszcz, Dept Phys, PL-85090 Bydgoszcz, Poland
[2] Kazimierz Wielki Univ Bydgoszcz, Mechantron Dept, PL-85074 Bydgoszcz, Poland
[3] Polish Acad Sci Krakow, Inst Nucl Phys, PL-31345 Krakow, Poland
[4] Deutsch Elektronen Synchrotron DESY, D-22607 Hamburg, Germany
来源：
JOURNAL OF LUMINESCENCE | 2024年 / 266卷
关键词：
Ca -Si based garnets; Micro -pulling -down method; Multicenter formation; Luminescence; Synchrotron radiation; Phosphor; -converter; WLED; Ce3+dopant; SYNCHROTRON-RADIATION; SINGLE-CRYSTALS; ENERGY-TRANSFER; PHOSPHORS; PHOTOLUMINESCENCE; CRYSTALLIZATION; SPECTROSCOPY; CENTERS; GROWTH; GARNET;
D O I：
10.1016/j.jlumin.2023.120311
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
This work is dedicated to investigation of the luminescent properties of the prospective photoconversion material based on the crystal of Ce3+ doped Ca3Sc2Si3O12 (CSSG) garnet. The GSSG:Ce crystal was grown using the micropulling-down (mu PD) method. The CSSG:Ce crystal exhibited an intensive photoluminescence (PL) emission band with two sub-bands peaked at 504 and 545 nm, corresponding to 5d-4f (2F5/2;7/2) transitions. Furthermore, we have investigated also the formation of cerium multicenters in the GSSG:Ce crystal using analyses of the structure of Ce3+ photoluminescence emission and excitation spectra under excitation of the luminescence of this crystal by synchrotron radiation. The formation of Ce3+-multicenters in CSSG:Ce garnet is caused by the local inhomogeneity of the dodecahedral sites of garnet lattice due to localization of the hetero-valent Sc3+ and Si4+ cations in the octahedral and tetrahedral positions of the garnet host. The existence of Ce3+ multicenters resulted in a significant enhancement of the Ce3+ emission band in the red range and improving the performance of conventional YAG:Ce phosphor. The next task of our work was to evaluate the possibility of application of the GSSG:Ce crystal as a light phosphor-converter (pc) for white light-emitting diodes (WLEDs). In the frame of this task, we have successfully developed a prototype of WLED by employing the CSSG:Ce crystal as a phosphorconverter (pc) with blue 450 emitting LED as well as investigated the color characteristics of this pc-WLED.
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页数：8
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