Surfactant effect on the upconversion emission and decay time of ZrO2:Yb-Er nanocrystals

被引：45
作者：
Solis, D. [1 ]
Lopez-Luke, T. [1 ,2 ]
De la Rosa, E. [1 ]
Salas, P. [3 ]
Angeles-Chavez, C. [4 ]
机构：
[1] Ctr Invest Opt, Leon 37160, Gto, Mexico
[2] CU, UMSNH, IIM, Morelia 58060, Michoacan, Mexico
[3] Univ Nacl Autonoma Mexico, Ctr Fis Aplicada & Tecnol Avanzada, Queretaro 76000, Qro, Mexico
[4] Inst Mexicano Petr, Mexico City 07730, DF, Mexico
来源：
JOURNAL OF LUMINESCENCE | 2009年 / 129卷 / 05期
关键词：
Decay time; Up-conversion; Nanocrystals; Surfactant; Pluronic-127; ZrO2; Yb; Er; Luminescence; LUMINESCENT PROPERTIES; ENERGY-TRANSFER; PARTICLE-SIZE; ER3+; NANOPARTICLES; SPECTROSCOPY; MECHANISMS; Y2O3-YB3+; LIFETIMES; LAF3;
D O I：
10.1016/j.jlumin.2008.11.015
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Luminescent properties of doped ZrO2:Er3+ and codoped ZrO2:Yb3+-Er3+ nanocrystals with average size similar to 54 nm were analyzed as a function of non-ionic surfactant (Pluronic F-127) concentration. Surfactant and non-surfactant samples were prepared by the sol-gel micelle process with hydrothermal aging and annealed at 1000 degrees C for 5 h. The introduction of the surfactant reduces the presence of impurities such as OH and CO2 on both samples, and increments the tetragonal phase for codoped nanocrystals. It induces an increment larger than 90% and 70% for doped and codoped, respectively, for an optimum molar ratio of 0.0082. The observed enlargement of fluorescence decay time is partly the result of the nanosize effect but is dominated by the reduction of impurities attached on the nanocrystalline surface. (C) 2008 Elsevier B.V. All rights reserved.
引用
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页码：449 / 455
页数：7
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