Journal
NANOSCALE
Volume 7, Issue 36, Pages 14897-14905Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr03714j
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Funding
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0012704]
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0012704]
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Single nanoparticle studies of charge trapping and de-trapping in core/shell CdSe/ZnS nanocrystals incorporated into an insulating matrix and subjected to an external electric field demonstrate the ability to reversibly modulate the exciton dynamics and photoluminescence blinking while providing indirect evidence for the existence of a permanent ground state dipole moment in such nanocrystals. A model assuming the presence of energetically deep charge traps physically aligned along the direction of the permanent dipole is proposed in order to explain the dynamics of nanocrystal blinking in the presence of a permanent dipole moment.
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