界面合金化和能带排列对异质纳米晶俄歇复合的影响
Effect of interface alloying and band-alignment on the Auger recombination of heteronanocrystals
摘要：
我们报告了一个数值研究的影响，界面合金化和能带排列的俄歇复合过程的核/壳纳米晶体。数值计算进行了使用两个频带的凯恩哈密顿量。光滑的界面被发现抑制俄歇复合，抑制的强度是非常敏感的核心大小。II型结构的使用构成了额外的抑制源，特别是当壳层限制电子而不是空穴时。我们表明，导致可忽略俄歇复合的“神奇”尺寸[Cragg和Efros，Nano Letters 10（2010）313]应该更容易在具有扩展界面合金化和宽带隙的纳米晶体中实验实现。
英文摘要：
We report a numerical study of the effect of interface alloying and band-alignment on the Auger recombination processes of core/shell nanocrystals. Numerical calculations are carried out using a two-band Kane Hamiltonian. Smooth interfaces are found to suppress Auger recombination, the strength of the suppression being very sensitive to the core size. The use of type-II structures constitutes an additional source of suppression, especially when the shell confines electrons rather than holes. We show that "magic" sizes leading to negligible Auger recombination [Cragg and Efros, Nano Letters 10 (2010) 313] should be easier to realize experimentally in nanocrystals with extended interface alloying and wide band gap.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
