期刊
NANO LETTERS
卷 14, 期 3, 页码 1134-1139出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl403311n
关键词
CdSe nanoplatelets; exciton; fine structure; dielectric confinement; dark exciton recombination
类别
资金
- Deutsche Forschungsgemeinschaft
- Agence Nationale de la Recherche
- ESPCI
- CNRS
- EU [237252]
We report a time-resolved study of the photoluminescence of CdSe colloidal nanoplatelets with two different thicknesses. By studying the exciton recombination dynamics we assess the exciton fine structure in these systems. The splitting between bright and dark excitons is enhanced compared to epitaxial quantum well structures as result of dielectric confinement. Despite of strong variations in the absolute magnitude, by comparison with literature data we find a relatively slightly varying bright dark exciton lifetime ratio in very different CdSe-based colloidal nanostructures, regardless of growth technique and of core and shell properties such as materials, dimensions, etc. This finding points to a universal mechanism in the dark exciton recombination.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据