Self-doped colloidal semiconductor nanocrystals with intraband transitions in steady state

摘要: The tunable bandgap energy has been recognized as a prominent feature of the colloidal semiconductor nanocrystal, also called quantum dot (CQD). Due to broken degeneracy caused by confinement effect, electronic states conduction band (CB) are separated few hundred meV. transition occurring in is intraband and regarded fast electron relaxation process that cannot be readily observed under steady state. However, recent progress studies transitions allowed observation mid-IR state ambient condition, providing pathway exploit for various optoelectronic applications. possible due filling lowest (1Se) nanocrystal. Specifically, nanocrystals “self-doped” with electrons through chemical synthesis – is, without need adding heterogeneous impurity or applying an electrical potential. In this article, we summarize advances study on along interesting findings magnetic properties self-doped metal chalcogenide nanocrystals. non-toxic nanocrystals, which exclude toxic mercury cadmium constituents, highlighted, hold promise safer applications utilizing higher