期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 118, 期 37, 页码 21682-21686出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp506536h
关键词
-
资金
- Knut and Alice Wallenberg Foundation
- Crafoord Foundation
- Swedish Energy Agency
- Swedish Research Council
- Swedish Foundation for Strategic Research
- Erasmus Mundus program
Surface states and traps play an important role in the photophysics of colloidal quantum dots. These states typically lead to large red-shifted photoluminescence. We have used steady-state and time-resolved spectroscopic techniques to investigate the nature of the traps and their lifetimes in colloidal CdSe quantum dots. We conclude that at least two different types of traps contribute to the photoluminescence. The trapping is more pronounced at higher excitation energies compared to the band edge excitation. Hole trapping is dominant in CdSe quantum dots. The time-resolved photoluminescence and pump probe measurements show that the trapped holes live for longer than tens of microseconds at room temperature.
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