Effect of Tb3+ concentration in the visible emission of terbium-doped gadolinium oxysulfide microspheres

被引：16

作者：

Hernandez-Adame, Luis ^{[1
]}

Palestino, Gabriela ^{[2
]}

Meza, Octavio ^{[3
]}

Luis Hernandez-Adame, Pablo ^{[4
]}

Rene Vega-Carrillo, Hector ^{[5
]}

Sarhid, Iyad ^{[6
]}

机构：

[1] Inst Politecn Nacl, CONACyT Ctr Invest Biol Noroeste CIBNOR, 195 Playa Palo de Santa Rita Sur, La Paz 23090, Bcs, Mexico

[2] Univ Autonoma San Luis Potosi, Fac Chem Sci, Biopolymers & Nanostruct Lab, Av Manuel Nava 6, San Luis Potosi 78210, Slp, Mexico

[3] Benemerita Univ Autonoma Puebla, Inst Fis, Postal J-48, Puebla 72570, Pue, Mexico

[4] Univ Autonoma San Luis Potosi, Inst Phys, Colloids & Interfaces Lab, Av Manuel Nava 6, San Luis Potosi 78210, Slp, Mexico

[5] Univ Autonoma Zacatecas, UA Estudios Nucl, Cipres 10, Zacatecas 98060, Zac, Mexico

[6] Univ Paris Saclay, Univ Paris Sud, UMR CNRS 8000, Lab Chim Phys, F-91405 Orsay, France

来源：

SOLID STATE SCIENCES | 2018年 / 84卷

关键词：

Gadolinium oxysulfide; Rate equations; Luminescence simulation; Microspheres; MAGNETIC-RESONANCE; ENERGY-TRANSFER; NANOPARTICLES; PHOTOLUMINESCENCE; LUMINESCENCE; MECHANISMS; PHOSPHOR; SPECTRA; EU;

D O I：

10.1016/j.solidstatesciences.2018.07.021

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Experimental data obtained from optical characterization of Gd2O2S:Tb(3+)microspheres were compared with a rate-equation model in order to understand and simulate the emission intensity and color tonality as a function of Tb3+ concentration. The microparticles were prepared by hydrothermal synthesis and characterized by TEM and XRD to confirm spherical microparticles with a hexagonal lattice. Furthermore, fluorescent spectroscopy and rate equation model revealed that the direct energy transfer between Gd3+-> Tb3+ ions and the migration of the excitation energy between Tb3+ play an important role in the luminescence intensity, while the color tonality is mainly governed by the non-radiative relaxation processes between Tb3+ at low concentrations. Finally, our results suggest that the rate equation model provides an efficient alternative to estimate theoretically the maximum doping concentration in oxysulfides before they present quenching of luminescence.

引用

页码：8 / 14

页数：7

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