Synthesis and upconversion luminescence properties of monodisperse Y2O3:Yb, Ho spherical particles

被引：40
作者：
Xing, Mingming [1 ]
Cao, Wanghe [1 ]
Zhong, Haiyang [1 ]
Zhang, Yinghui [1 ]
Luo, Xixian [1 ]
Fu, Yao [1 ]
Feng, Wei [1 ]
Pang, Tao [1 ]
Yang, Xiaofei [2 ]
机构：
[1] Dalian Maritime Univ, Dept Phys, Dalian 116026, Peoples R China
[2] Soochow Univ, Jiangsu Prov Key Lab Mordern Opt Technol, Suzhou 215006, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2011年 / 509卷 / 19期
基金：
中国国家自然科学基金;
关键词：
Upconversion luminescence; Y2O3:Yb; Ho; Homogeneous precipitation method; INFRARED RADIATION; EMISSION; RED; LANTHANIDE; MORPHOLOGY; YTTERBIUM; HOLMIUM; YTTRIA; SIZE; YB3+;
D O I：
10.1016/j.jallcom.2011.02.135
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：
Monodispersed spherical Y2O3:Yb, Ho upconversion luminescence (UCL) particles with sizes of 40-200nm are prepared using a homogeneous precipitation method. It is found that aging time, varying between 90 and 10 min, has a profound influence on the precursor size, which systematically decreases from 230nm to 50 nm. The precursor shows poor stability when aging time is 10 min, and the stability of precursor can be improved by increasing the urea concentration. The UCL spectra of Y2O3:Yb, Ho with different particle sizes are investigated. The results indicate that the integrated emission intensity ratio of green to red (R-green/red) exhibits a gradual decrease from 2.7 to 0.45 when the particle size decreases from 200nm to 40 nm, and the possible reasons are evaluated. (C) 2011 Elsevier B. V. All rights reserved.
引用
收藏
页码：5725 / 5730
页数：6
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