光子上转换
材料科学
离子
纳米晶
激发
分析化学(期刊)
分散性
激光器
发射强度
原子物理学
放松(心理学)
辐照
发光
光学
纳米技术
光电子学
物理
核物理学
化学
社会心理学
量子力学
高分子化学
色谱法
心理学
作者
Guanying Chen,Haichun Liu,Gabriel Somesfalean,Huijuan Liang,Zhiguo Zhang
出处
期刊:Nanotechnology
[IOP Publishing]
日期:2009-08-28
卷期号:20 (38): 385704-385704
被引量:198
标识
DOI:10.1088/0957-4484/20/38/385704
摘要
Upconversion (UC) emission tuning from green to red in monodisperse NaYF4:Yb3+/Ho3+ nanocrystals was successfully achieved by tridoping with Ce3+ ions under diode laser excitation of 970 nm. It is proposed that two efficient cross-relaxation processes, and between Ho3+ and Ce3+ ions, have been employed to select UC pathways to tune the UC radiation. Theoretical investigations based on steady-state equations demonstrate the proposed UC mechanisms and explain well the observed linear increase of the UC red-to-green intensity ratio with the increment of Ce3+ ion concentrations.
科研通智能强力驱动
Strongly Powered by AbleSci AI