Science and application of oxyorthosilicate nanophosphors

被引：29

作者：

Muenchausen, Ross E. ^{[1
]}

McKigney, Edward A. ^{[1
]}

Jacobsohn, Luiz G. ^{[1
]}

Blair, Michael W. ^{[1
]}

Bennett, Bryan L. ^{[1
]}

Cooke, D. Wayne ^{[1
]}

机构：

[1] Los Alamos Natl Lab, Los Alamos, NM 87544 USA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2008年 / 55卷 / 03期

关键词：

concentration quenching; fluorescence lifetime; luminescence; nanophosphor; oxyorthosilicates;

D O I：

10.1109/TNS.2008.922844

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Nanophosphor Y2SiO5:Ce (n-YSO), LU2SiO5:Ce (n-LSO), and Gd2SiO5:Ce (n-GSO) were prepared by solution-combustion synthesis yielding nanophosphor crystallite sizes between 20 nm - 80 nm. Ce dopant concentrations were varied between 0.1%-10% for each the nanophosphors and concentration quenching curves were measured by radioluminescence (RL) and photoluminescence (PL). n-YSO exhibits concentration quenching at 1 at% and 4 at% under uv and x-ray excitation, respectively. Red shifted emission with a larger Stokes shift is observed for nanophosphors as compared to bulk crystals. The measured PL lifetime depended on the refractive index of the media, indicating that the PL originates from the surface. Measurements of the RL/PL intensity indicate that the light output of these materials is comparable to the bulk crystal.

引用

页码：1532 / 1535

页数：4

共 31 条

[1] DETERMINATION OF CRYSTALLITE SIZE WITH THE X-RAY SPECTROMETER [J].