在十六胺 - 三辛基氧化膦 - 三辛基膦混合物中合成的高发光单分散硒化镉和硒化镉/硫化锌纳米晶体。

Highly Luminescent Monodisperse CdSe and CdSe/ZnS Nanocrystals Synthesized in a Hexadecylamine-Trioctylphosphine Oxide-Trioctylphospine Mixture.

作者信息

Talapin Dmitri V, Rogach Andrey L, Kornowski Andreas, Haase Markus, Weller Horst

机构信息

Institute of Physical Chemistry, University of Hamburg, Bundesstrasse 45, 20146 Hamburg, Germany.

出版信息

Nano Lett. 2001 Apr;1(4):207-211. doi: 10.1021/nl0155126.

DOI:10.1021/nl0155126

PMID:35897166

Abstract

Highly monodisperse CdSe nanocrystals were prepared in a three-component hexadecylamine-trioctylphosphine oxide-trioctylphosphine (HDA-TOPO-TOP) mixture. This modification of the conventional organometallic synthesis of CdSe nanocrystals in TOPO-TOP provides much better control over growth dynamics, resulting in the absence of defocusing of the particle size distribution during growth. The room-temperature quantum efficiency of the band edge luminescence of CdSe nanocrystals can be improved to 40-60% by surface passivation with inorganic (ZnS) or organic (alkylamines) shells.

摘要

在十六胺-三辛基氧化膦-三辛基膦（HDA-TOPO-TOP）三元混合物中制备了高度单分散的CdSe纳米晶体。这种对TOPO-TOP中传统有机金属合成CdSe纳米晶体方法的改进，能更好地控制生长动力学，从而在生长过程中不会出现粒径分布的散焦现象。通过用无机（ZnS）或有机（烷基胺）壳层进行表面钝化，CdSe纳米晶体的带边发光在室温下的量子效率可提高到40% - 60%。