Photoluminescence of colloidal YVO4:Eu/SiO2 core/shell nanocrystals

Yan Wang; Weiping Qin; Jisen Zhang; Chunyan Cao; Shaozhe Lü; Xinguang Ren

doi:10.1016/j.optcom.2008.12.007

Photoluminescence of colloidal YVO₄:Eu/SiO₂ core/shell nanocrystals

Yan Wang
, Weiping Qin
, Jisen Zhang
, Chunyan Cao
, Shaozhe Lü
, Xinguang Ren

Research output: Contribution to journal › Article › peer-review

67 Scopus citations

Abstract

YVO₄:Eu, and YVO₄:Eu/SiO₂ nanocrystals (NCs) were prepared by hydrothermal method with citrate as capping ligands. Their morphologies, structures, components, and photoluminescence properties were investigated and presented in this paper. A remarkable fluorescence enhancement up to 2.17 times was observed in colloidal YVO₄:Eu/SiO₂ NCs, compared to that of colloidal YVO₄:Eu NCs. This is mainly attributed to the formation of the outer protecting layers of biocompatible SiO₂ shells; which shield the Eu³⁺ ions effectively from water and thus reduces the deleterious effects of water on the luminescence. Meanwhile, on the basis of laser selective excitation, two kinds of luminescent centers were confirmed in the NCs, namely, inner Eu³⁺ ions and surface Eu³⁺ ions. The surface modifications for YVO₄:Eu NCs effectively reduced the surface defects and accordingly enhanced the luminescence. The core/shell NCs exhibited long fluorescence lifetime and high photostability under ultraviolet radiation.

Original language	English
Pages (from-to)	1148-1153
Number of pages	6
Journal	Optics Communications
Volume	282
Issue number	6
DOIs	https://doi.org/10.1016/j.optcom.2008.12.007
State	Published - 15 Mar 2009
Externally published	Yes

Keywords

Core/shell
Laser selective excitation
Nanocrystals
Photoluminescence
YVO:Eu/SiO

Access to Document

10.1016/j.optcom.2008.12.007

Cite this

@article{79c0c446b6ab40d5aba9b12e568824ac,

title = "Photoluminescence of colloidal YVO4:Eu/SiO2 core/shell nanocrystals",

abstract = "YVO4:Eu, and YVO4:Eu/SiO2 nanocrystals (NCs) were prepared by hydrothermal method with citrate as capping ligands. Their morphologies, structures, components, and photoluminescence properties were investigated and presented in this paper. A remarkable fluorescence enhancement up to 2.17 times was observed in colloidal YVO4:Eu/SiO2 NCs, compared to that of colloidal YVO4:Eu NCs. This is mainly attributed to the formation of the outer protecting layers of biocompatible SiO2 shells; which shield the Eu3+ ions effectively from water and thus reduces the deleterious effects of water on the luminescence. Meanwhile, on the basis of laser selective excitation, two kinds of luminescent centers were confirmed in the NCs, namely, inner Eu3+ ions and surface Eu3+ ions. The surface modifications for YVO4:Eu NCs effectively reduced the surface defects and accordingly enhanced the luminescence. The core/shell NCs exhibited long fluorescence lifetime and high photostability under ultraviolet radiation.",

keywords = "Core/shell, Laser selective excitation, Nanocrystals, Photoluminescence, YVO:Eu/SiO",

author = "Yan Wang and Weiping Qin and Jisen Zhang and Chunyan Cao and Shaozhe L{\"u} and Xinguang Ren",

year = "2009",

month = mar,

day = "15",

doi = "10.1016/j.optcom.2008.12.007",

language = "English",

volume = "282",

pages = "1148--1153",

journal = "Optics Communications",

issn = "0030-4018",

publisher = "Elsevier B.V.",

number = "6",

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TY - JOUR

T1 - Photoluminescence of colloidal YVO4:Eu/SiO2 core/shell nanocrystals

AU - Wang, Yan

AU - Qin, Weiping

AU - Zhang, Jisen

AU - Cao, Chunyan

AU - Lü, Shaozhe

AU - Ren, Xinguang

PY - 2009/3/15

Y1 - 2009/3/15

N2 - YVO4:Eu, and YVO4:Eu/SiO2 nanocrystals (NCs) were prepared by hydrothermal method with citrate as capping ligands. Their morphologies, structures, components, and photoluminescence properties were investigated and presented in this paper. A remarkable fluorescence enhancement up to 2.17 times was observed in colloidal YVO4:Eu/SiO2 NCs, compared to that of colloidal YVO4:Eu NCs. This is mainly attributed to the formation of the outer protecting layers of biocompatible SiO2 shells; which shield the Eu3+ ions effectively from water and thus reduces the deleterious effects of water on the luminescence. Meanwhile, on the basis of laser selective excitation, two kinds of luminescent centers were confirmed in the NCs, namely, inner Eu3+ ions and surface Eu3+ ions. The surface modifications for YVO4:Eu NCs effectively reduced the surface defects and accordingly enhanced the luminescence. The core/shell NCs exhibited long fluorescence lifetime and high photostability under ultraviolet radiation.

AB - YVO4:Eu, and YVO4:Eu/SiO2 nanocrystals (NCs) were prepared by hydrothermal method with citrate as capping ligands. Their morphologies, structures, components, and photoluminescence properties were investigated and presented in this paper. A remarkable fluorescence enhancement up to 2.17 times was observed in colloidal YVO4:Eu/SiO2 NCs, compared to that of colloidal YVO4:Eu NCs. This is mainly attributed to the formation of the outer protecting layers of biocompatible SiO2 shells; which shield the Eu3+ ions effectively from water and thus reduces the deleterious effects of water on the luminescence. Meanwhile, on the basis of laser selective excitation, two kinds of luminescent centers were confirmed in the NCs, namely, inner Eu3+ ions and surface Eu3+ ions. The surface modifications for YVO4:Eu NCs effectively reduced the surface defects and accordingly enhanced the luminescence. The core/shell NCs exhibited long fluorescence lifetime and high photostability under ultraviolet radiation.

KW - Core/shell

KW - Laser selective excitation

KW - Nanocrystals

KW - Photoluminescence

KW - YVO:Eu/SiO

UR - https://www.scopus.com/pages/publications/58649093087

U2 - 10.1016/j.optcom.2008.12.007

DO - 10.1016/j.optcom.2008.12.007

M3 - Article

AN - SCOPUS:58649093087

SN - 0030-4018

VL - 282

SP - 1148

EP - 1153

JO - Optics Communications

JF - Optics Communications

IS - 6