Journal article
Ultrafast Electron Trapping in Ligand-Exchanged Quantum Dot Assemblies
ACS nano, v 9(2), pp 1440-1447
01 Feb 2015
PMID: 25635923
Abstract
We use time-integrated and time-resolved photoluminescence and absorption to characterize the low-temperature optical properties of CdSe quantum dot solids after exchanging native aliphatic ligands for thiocyanate and subsequent thermal annealing. In contrast to trends established at room temperature, our data show that at low temperature the band-edge absorptive bleach is dominated by 1S(3/2h) hole occupation in the quantum dot interior. We find that our ligand treatments, which bring enhanced interparticle coupling, lead to faster surface state electron trapping, a greater proportion of surface-related photoluminescence, and decreased band-edge photoluminescence lifetimes.
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Details
- Title
- Ultrafast Electron Trapping in Ligand-Exchanged Quantum Dot Assemblies
- Creators
- Michael E. Turk - University of PennsylvaniaPatrick M. Vora - University of PennsylvaniaAaron T. Fafarman - University of PennsylvaniaBenjamin T. Diroll - University of PennsylvaniaChristopher B. Murray - University of PennsylvaniaCherie R. Kagan - University of PennsylvaniaJames M. Kikkawa - University of Pennsylvania
- Publication Details
- ACS nano, v 9(2), pp 1440-1447
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 8
- Grant note
- DE-SC0002158 / U.S. Department of Energy Office of Basic Energy Sciences, Division of Materials Science and Engineering; United States Department of Energy (DOE)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000349940500041
- Scopus ID
- 2-s2.0-84923442732
- Other Identifier
- 991019173805304721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology