Synthesis and spectral properties of colloidal Nd3+ doped NaYF4 nanocrystals

被引：57

作者：

Bednarkiewicz, Artur ^{[1
]}

Wawrzynczyk, Dominika ^{[2
]}

Nyk, Marcin ^{[2
]}

Strek, Wieslaw ^{[1
]}

机构：

[1] PAN, Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland

[2] Wroclaw Univ Technol, Dept Chem, Inst Phys & Theoret Chem, PL-50370 Wroclaw, Poland

来源：

OPTICAL MATERIALS | 2011年 / 33卷 / 10期

关键词：

Judd-Ofelt analysis; NaYF4 colloidal nanocrystals; Neodymium; UP-CONVERSION LUMINESCENCE; EARTH FLUORIDE NANOCRYSTALS; TRANSPARENT GLASS-CERAMICS; PHOSPHOR REPORTERS; IN-VIVO; NANOPARTICLES; TM3+; YB3+; PHASE; ER3+;

D O I：

10.1016/j.optmat.2011.01.006

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Transparent, chloroform dispersed alpha-NaYF4 nanocrystals doped with neodymium ions were synthesized and characterized. XRD and TEM measurement confirmed cubic structure of alpha-NaYF4 of the nanoparticles (NPs). The absorption and emission spectra as well as F-4(3/2) level fluorescence decay curves were measured in order to estimate the influence of Nd3+ concentration in the matrix on the optical properties of the NPs. With the increase of Nd3+ doping level, the Judd-Ofelt Omega(4) parameter as well as the spectroscopic Nd3+ parameter X-Nd = Omega(4)/Omega(6) was growing. In the same time the Omega(2) and Omega(6) were decreasing. Theoretical luminescence lifetimes of the F-4(3/2) level equal to similar to 300 mu s were also calculated and compared with the experimental values to quantify the concentration quenching. Based on this comparison, quantum efficiency was found to vary systematically between similar to 100% and 4% for Nd3+ content increasing from 2 up to 25%. (C) 2011 Published by Elsevier B.V.

引用

页码：1481 / 1486

页数：6

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