Structure and photoluminescence characterization of Tb3+-doped LaPO4 nanorods prepared via the microwave-assisted method

被引：31

作者：

Duong Thi Lien ^{[1
]}

Duong Thi Mai Huong ^{[1
]}

Le Van Vu ^{[1
]}

Nguyen Ngoc Long ^{[1
]}

机构：

[1] Vietnam Natl Univ, Hanoi Univ Sci, Fac Phys, Ctr Mat Sci, Hanoi, Vietnam

来源：

JOURNAL OF LUMINESCENCE | 2015年 / 161卷

关键词：

Lanthanum orthophosphate; Nanorods; Microwave-assisted method; Raman scattering; Photoluminescence; SOL-GEL SYNTHESIS; ENERGY-TRANSFER PROCESSES; LIQUID-PHASE SYNTHESIS; LUMINESCENT PROPERTIES; HYDROTHERMAL SYNTHESIS; DOPED NANOCRYSTALS; RAMAN-SCATTERING; 6H-SIC CRYSTALS; CE3+; TB3+;

D O I：

10.1016/j.jlumin.2015.01.050

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

LaPO4 nanopowders doped with 1, 2... 10, 11, 15 and 20 mol% Tb3+ have been prepared by the microwave-assisted method. Transmission electron microscope (TEM) images indicated that the nanopowders are composed of nanorods. X-ray diffraction (XRD) analysis showed that the prepared nanorods exhibit hexagonal crystal structure and the diffraction peaks were shifted towards the higher 2 theta angle side with increasing Tb3+ dopant concentration. Raman scattering measurement found out that some of scattering lines were shifted and broadened to higher wavenumber side with increasing Tb3+ concentration. It is discovered that the photoluminescence (PL) of Tb3+ ions results from the radiative intra-configurational f-f transitions that occur from the D-5(4) exited state to the F-7(J) (J=0,1-6) ground states; the photoluminescence excitation (PLE) of Tb3+ ions takes place from the F-7(6) ground state to the D-5(J) (J=0,1-4), L-5(10), (5)G(J) (J=2-4), H-5(J) and I-5(J) exited states. It was observed that the photoluminescence intensity reached a maximum in the samples doped with 15 mol% Tb3+. Double-exponential decay of the D-5(4)-> F-7(6) emission was observed with lifetimes of similar to 5 ns and 6.35 ms. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：389 / 394

页数：6

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