量子点
异质结
碲化镉光电
带偏移量
量子异质结构
凝聚态物理
波函数
材料科学
壳体(结构)
光电子学
物理
带隙
量子阱
原子物理学
量子力学
价带
激光器
复合材料
作者
Jingbo Li,Lin‐Wang Wang
摘要
The electronic states of core/shell CdSe/CdS and CdSe/CdTe heterostructure quantum dots are studied by large-scale first-principles calculations. According to their natural band-offset alignments CdSe/CdS is a type-I heterostructure and CdSe/CdTe is a type-II heterostructure. We found that, the electron state changes very little, but the hole wave function in CdSe/CdS quantum dots has been localized within the core, while the hole wave function in CdSe/CdTe quantum dots is localized within the shell. The hole state in CdSe/CdTe quantum dots has drastically different characteristics as in CdSe and CdSe/CdS quantum dots. The band alignment, strain effect, and quantum confinement are all important to determine the electronic structures of these systems.
科研通智能强力驱动
Strongly Powered by AbleSci AI