Upconversion luminescence in BaYF5, BaGdF5 and BaLuF5 nanocrystals doped with Yb3+/Ho3+, Yb3+/Er3+ or Yb3+/Tm3+ ions

被引：60

作者：

Grzyb, Tomasz ^{[1
]}

Balabhadra, Sangeetha ^{[2
]}

Przybylska, Dominika ^{[1
]}

Weclawiak, Mariusz ^{[1
]}

机构：

[1] Adam Mickiewicz Univ, Fac Chem, Dept Rare Earths, PL-61614 Poznan, Poland

[2] Univ Aveiro, Dept Phys, P-3810193 Aveiro, Portugal

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 649卷

关键词：

Nanocrystals; Upconversion; Energy transfer; Lanthanides; Fluorides; Hydrothermal method; COOPERATIVE ENERGY-TRANSFER; IN-VIVO; PHOTODYNAMIC THERAPY; MAGNETIC-PROPERTIES; OPTICAL-PROPERTIES; SUB-10; NM; NANOPARTICLES; YB3+; ER3+; SIZE;

D O I：

10.1016/j.jallcom.2015.07.151

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：

Nanomaterials based on BaREF5 fluorides (where RE = Y, Gd and Lu), doped with lanthanide ions Yb3+/Ln(3+) (Ln(3+) = Er, Ho or Tm) were synthesized by microwave assisted hydrothermal method. The method of synthesis, structural and morphological properties are reported and discussed. The products obtained showed visible upconversion luminescence excited by the laser light of wavelength of 975 nm as a consequence of energy transfer between Yb3+ and remaining Ln(3+) dopant ions. Their spectroscopic properties were characterized on the basis of excitation and emission spectra. Also luminescence decays and emission power dependences are presented and analysed. The materials compared revealed differences in their structural properties, reflected in their spectroscopic characteristics. The most intense luminescence was recorded for BaLuF5 based materials which exhibited upconversion also as water colloids. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：606 / 616

页数：11

共 88 条

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