Abstract:

The monodisperse and uniform CdSe quantum dots (QDs) were synthesized in a mixed solvent of octadecylamine (ODA) and octadecanol (OD) by using the high-temperature solvent method.The diameter and optical properties of the QDs prepared under different reaction times and different ODA contents were characterized.The measurement results showed that with the increase of added ODA content, the diameter of the QDs was hardly influenced, whereas the PL quantum yield tended to increase.

Key words:

高温溶剂法, 量子点, 量子效率, CdSe, 十八胺

摘要：

利用高温溶剂法，在十八胺(ODA)和十八醇(OD)混合溶剂中合成了CdSe量子点(QDs)，表征了在不同反应时间和不同ODA与OD质量比条件下制备的QDs粒径和光学性质。结果表明，在混合溶剂中不仅可以制备出分散性良好、粒径均匀的QDs，而且还能获得高量子效率的产物；ODA含量变化基本不影响QDs的初始成核粒径，但对量子效率有很明显的影响，ODA含量的增加对获得高量子效率的产物有利。

关键词:

高温溶剂法, 量子点, 量子效率, CdSe, 十八胺