期刊
JOURNAL OF MATERIALS RESEARCH
卷 24, 期 6, 页码 2042-2050出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1557/JMR.2009.0258
关键词
-
资金
- National University of Singapore
- Office of Naval Research, USA
Bulk NaYF4:Yb,Er particles (similar to 1.4 mu m particle size) were synthesized using a hydrothermal method. As-synthesized particles were subsequently ball milled to three average particle sizes, namely, similar to 260 nm, 160 nm, and 100 nm. The x-ray diffraction pattern showed an hcp phase for as-synthesized and ball-milled particles with a predominant (100) peak. Room temperature emission spectra showed no size dependent peak shifts or peak broadening. The intensities of both green and red emissions decreased with increasing milling time. Segregation of Er ions was detected on the surfaces of milled particle that reduced the sensitizer-activator transition probability, resulting in decreased emission intensities. The green-to-red emission ratio was correlated to the surface enrichment of Er, which affected the cross-relaxation of luminescence dynamics.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据