Enhanced photoluminescence of core-shell CoFe2O4/SiO2/Y2O3:Eu3+ composite by remanent magnetization

被引：12

作者：

Jia, Yanmin ^{[1
]}

Zhou, Zhihua ^{[1
]}

Wei, Yongbin ^{[1
]}

Wu, Zheng ^{[2
]}

Wang, Haihang ^{[1
]}

Chen, Jianrong ^{[2
]}

Zhang, Yihe ^{[3
]}

Liu, Yongsheng ^{[4
]}

机构：

[1] Zhejiang Normal Univ, Dept Phys, Jinhua 321004, Peoples R China

[2] Zhejiang Normal Univ, Coll Geog & Environm Sci, Jinhua 321004, Peoples R China

[3] China Univ Geosci, Sch Mat Sci & Technol, Beijing 100083, Peoples R China

[4] Shanghai Univ Elect Power, Dept Phys, Shanghai 200090, Peoples R China

来源：

SMART MATERIALS AND STRUCTURES | 2013年 / 22卷 / 12期

基金：

中国国家自然科学基金;

关键词：

LUMINESCENCE PROPERTIES; PARTICLES; SILICA; NANOCOMPOSITE; NANOCRYSTALS; Y2O3/EU3+; PHOSPHOR;

D O I：

10.1088/0964-1726/22/12/125014

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

A core-shell cobalt ferrite/silicon dioxide/europium ion-doped Y2O3 (CoFe2O4/SiO2/Y2O3:Eu3+) composite was synthesized by a facile layer-by-layer method. Magnetization of the composite under an external magnetic field of approximately 0.25 T enhanced the photoluminescence (PL) intensity by 56%. The remanent magnetization of the CoFe2O4 core increased the excited charge-transfer transition between O2- and Eu3+ in the Y2O3: Eu3+ shell, thus enhancing the probability of radiative transition (D-5(0)-> F-7(2)) of Eu3+ ions and leading to enhanced PL. Remanent magnetization is a noncontact, easy-to-operate technique with high growth amplitude and potential for practical application for smart display devices.

引用

页数：6

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