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Size engineering optoelectronic features of C, Si and CSi hybrid diamond-shaped quantum dots

机译:C,Si和CSI杂交菱形量子点的尺寸工程光电特征

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摘要

Based on the density functional theory and many-body ab initio calculations, we investigate the optoelectronic properties of diamond-shaped quantum dots based graphene, silicene and graphene-silicene hybrid. The HOMO-LUMO (H-L) energy gap, the exciton binding energy, the singlet-triplet energy splitting and the electron-hole overlap are all determined and discussed. Smaller nanostructures show high chemical stability and strong quantum confinement resulting in a significant increase in H-L gap and exciton binding energy. On the other hand, the larger configurations are reactive which implies characteristics favorable to possible electronic transport and conductivity. In addition, the typically strong splitting between singlet and triplet excitonic states and the big electron-hole overlap make these QDs emergent systems for nanomedicine applications.
机译:基于密度函数理论和许多体AB初始计算,我们研究了基于菱形量子点的石墨烯,硅和石墨烯 - 杂种的光电性能。 HOMO-LUMO(H-L)能隙,激子结合能量,单向三重态能量分裂和电子孔重叠全部确定并讨论。 较小的纳米结构显示出高化学稳定性和强量子限制,导致H-L间隙和激子结合能量显着增加。 另一方面,较大的配置是反应性,其意味着有利于可能的电子传输和电导率的特征。 此外,单线态和三重兴趣状态之间的典型裂缝和大电子孔重叠使得这些QDS突发系统用于纳米医生应用。

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    《RSC Advances》 |2019年第49期|共9页
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  • 正文语种 eng
  • 中图分类 化学;
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