应变和表面近距离对ZnO接受器分组的影响
Oksana Volnianska1, Vitalii Ivanov1, Lukasz Wachnicki1
1Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland.
压力和表面接近影响氧化 (ZnO) 导电性,通过影响受体复合体的形成. 这就解释了为什么这些复合物聚集在特定的晶体中或在ZnO薄膜中的表面附近.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 表面科学是一门学科.
背景情况:
- 氧化 (ZnO) 导电性与具有原生缺陷和的供体和受体复合体有关.
- 这些复合物在不同ZnO晶体中观察到的聚合缺乏明确的解释.
- 之前的研究表明,在ZnO和ZnO/N膜中,受体和捐赠体复合物的分组.
研究的目的:
- 研究ZnO中接受体和捐赠体复合群的起源.
- 确定应变和表面接近对受体复合体形成的影响.
- 将 ZnO 薄膜结构与接受器发光相关联.
主要方法:
- 密度函数理论 (DFT) 对未使用兴奋剂的 ZnO 的计算.
- 对低温阴极光发光和扫描光电子显微镜数据的分析.
- 低温光发光谱学. 低温光发光谱学.
主要成果:
- DFT的计算显示,应变和表面的近距离显著改变了接受器复合体形成能量.
- 适当的应变和表面接近促进了接受器复合物的更容易形成.
- 光发光谱证实了受体发光与ZnO膜结构之间的强烈联系.
结论:
- 压力和表面接近是推动受体复合体在特定ZnO晶体中聚合的关键因素.
- 这种现象解释了接受中心观察到的不均分布.
- 氧薄膜的结构特征直接影响受体的发光.
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