Journal
JOURNAL OF CHEMICAL PHYSICS
Volume 151, Issue 17, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.5125021
Keywords
-
Funding
- National Science Foundation [OISE-1827087]
- Alfred P. Sloan Foundation
- NSF [1532125]
Ask authors/readers for more resources
In this study, the role that primary amines play during triplet energy transfer from photoexcited CdSe nanocrystals (NCs) was examined. Colloidally synthesized CdSe NCs were placed in varying concentrations of 1-propyl- or 1-octylamine, with and without 2-anthracenecarboxylic acid transmitter ligands attached. This primary amine increases upconversion quantum yield approximately 5-fold. Further addition of amine does not improve photon upconversion, as CdSe NC photoluminescence (PL) increases at the expense of triplet energy transfer. Transient absorption measurements show that the amine plays three key roles. Primary amines enhance NC PL by decreasing the nonradiative decay rate, increase the rate of triplet energy transfer, and enable the broad trap state in these CdSe NCs to participate in triplet photosensitization.
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