阴极发光
发光
Crystal(编程语言)
光致发光
材料科学
激发态
分析化学(期刊)
原子物理学
化学
光电子学
物理
计算机科学
色谱法
程序设计语言
作者
Jun-Peng Hu,Fang Liu,Xiaoping Ouyang
出处
期刊:Cornell University - arXiv
日期:2014-08-19
摘要
We investigate the luminescence characteristic of different scale CsI:Na crystals excited via photoluminescence(PL) and cathodoluminescence (CL). The CsI:Na crystals are processed to three samples with different diameter, decreasing from micro-scale to nano-scale. It is found that the nano-scale CsI:Na crystal emits 420nm luminescence by PL, while its emission band is at 315nm and 605nm by CL. The reason for this phenomenon relates to the energy and density of incident particles, and the diameter of CsI:Na crystal. When crystal diameter decreases to nano-scale, the number of surface defects relatively increases, leading to the Na-relative luminescence decreasing. In addition, we have also investigated the CsI:Tl crystal with the same experiment condition. The result indicates that the emission almost has nothing to do with the crystal diameter.
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