Size-Dependent Persistent Luminescence of YAGG:Cr3+ Nanophosphors

被引：7

作者：

Boiko, Vitalii ^{[1
]}

Dai, Zhengfa ^{[1
,2
]}

Chaika, Mykhailo ^{[1
]}

Grzeszkiewicz, Karina ^{[1
]}

Li, Jiang ^{[2
,3
]}

Strek, Wieslaw ^{[1
]}

Hreniak, Dariusz ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Low Temp & Struct Res, Div Opt Spect, Okolna 2, PL-50422 Wroclaw, Poland

[2] Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Transparent Optofunct Inorgan Mat, Shanghai 201899, Peoples R China

[3] Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China

来源：

MATERIALS | 2022年 / 15卷 / 13期

基金：

国家重点研发计划;

关键词：

YAGG; transition metal (Cr); lattice parameter; persistent luminescence; thermoluminescence; traps redistribution; CATION DISTRIBUTION; CR3+; PHOSPHORESCENCE; LIGHT;

D O I：

10.3390/ma15134407

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In the current work, YAGG:Cr3+ nanophosphors were synthesized by the Pechini method and then annealed at different temperatures in the range 800-1300 degrees C. The structure and morphology of the samples were characterized by X-ray Powder Diffraction (XRPD). The lattice parameters and average crystalline sizes as site occupation by Al3+ and Ga3+ ions were calculated from the Rietveld refinement data. To investigate the effect of crystalline size of the materials on their optical properties: excitation and emission spectra were recorded and analyzed. Finally, the effect of crystalline size on the probability of carrier recombination leading to PersL was determined experimentally with thermoluminescence analyses. The T-max-T-stop method was applied to determine the trap type and particle size (calcination temperature) effect on their redistribution. A correlation between structural changes and trap redistribution was found. In particular, the extinction of high-temperature TL maximum with increasing annealing temperatures is observed, while low-temperature TL maximum increases and reaches a maximum when the lattice parameter reaches saturation.

引用

页数：13

共 41 条

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