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硫化的相位依赖热发光特性
Shrouk Farouk1, Amany Farouk1, Nabil El-Faramawy2
1Physics Department, Faculty of Science, Ain Shams University, Cairo, Egypt.
Journal of fluorescence
|December 3, 2024
概括
硫化 (ZnS) 的热处理增强了其热发光 (TL) 特性. 一个小的石阶段存在显著提高了TL强度,揭示了对缺陷捕获机制的洞察力.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 发光的阴影是什么意思
背景情况:
- 热发光 (TL) 是剂量测量和材料表征的关键性质.
- 热处理是修改材料结构和发光特性的一种常见方法.
- 硫化 (ZnS) 是一种半导体材料,在各种领域都有潜在的应用.
研究的目的:
- 研究热处理时间对混合物 (ZnS) 样品的热发光和结构特征的影响.
- 为了将不同晶相的存在与热发光强度相关联.
- 用先进的解卷方法分析缺陷的捕捉动力学.
主要方法:
- 不同时间 (2-10小时) 的 ZnS 样品的化.
- 用X射线衍射 (XRD) 来进行相位识别 (立方体和六角形石).
- 高分辨率传输电子显微镜 (HR-TEM) 用于形态分析.
- 热发光 (TL) 的测量.
- 计算机化发光曲线解卷 (CGCD) 和初始上升 (IR) 方法用于TL发光曲线分析.
主要成果:
- 在 ZnS 样本中,热处理诱导了 wurtzite 六角相的形成.
- 对于含有8.2%石和91.8%立方 ZnS.的样本,观察到最佳的TL强度.
- HR-TEM揭示了具有统一大小和形状的聚合ZnS纳米粒子.
- 根据CGCD的分析,发现了6个在0.98和1.45 eV之间的捕获峰值,在进一步处理后增加到8个峰值.
- 成功评估了陷的激活能量和频率因子.
结论:
- 热处理通过改变其晶相组成,显著影响ZnS的热发光特性.
- 石阶段的少量百分比的存在有利于提高 ZnS 中的 TL 强度.
- 该研究提供了对热处理ZnS中缺陷捕获机制的详细了解,这与材料开发有关.
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