Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 112, Issue 29, Pages 10668-10673Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp8009172
Keywords
-
Ask authors/readers for more resources
We have investigated the temperature dependence of photoluminescence (PL) dynamics in CdS quantum dots (QDs) prepared by a colloidal method. A size-selective photoetching process and a surface modification technique with a Cd(OH)2 layer enabled us to prepare size-controlled CdS QDs with high PL efficiency. The PL decay profiles became slower with an increase in temperature, contrary to an ordinary behavior. We have revealed that such anomalous temperature dependence of the PL-decay profile is explained by a three-state model consisting of a ground-state and two excited states: a lower-lying bound-exciton state and a higherlying free-exciton state (the dark-exciton state) having an optically inactive triplet nature.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available