Charge trapping and de-trapping in isolated CdSe/ZnS nanocrystals under an external electric field: Indirect evidence for a permanent dipole moment
Abstract
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.
- Authors:
-
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Univ. "Politehnica" of Bucharest, Bucharest (Romania)
- Publication Date:
- Research Org.:
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1213388
- Report Number(s):
- BNL-108272-2015-JA
Journal ID: ISSN 2040-3364; NANOHL; KC0403020
- Grant/Contract Number:
- SC00112704
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Nanoscale
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 1; Journal ID: ISSN 2040-3364
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; colloidal quantum dots; charge transfer; dipole moment; blinking; quantum-confined Stark effect
Citation Formats
Zang, Huidong, Cristea, Mihail, Shen, Xuan, Liu, Mingzhao, Camino, Fernando, and Cotlet, Mircea. Charge trapping and de-trapping in isolated CdSe/ZnS nanocrystals under an external electric field: Indirect evidence for a permanent dipole moment. United States: N. p., 2015.
Web. doi:10.1039/C5NR03714J.
Zang, Huidong, Cristea, Mihail, Shen, Xuan, Liu, Mingzhao, Camino, Fernando, & Cotlet, Mircea. Charge trapping and de-trapping in isolated CdSe/ZnS nanocrystals under an external electric field: Indirect evidence for a permanent dipole moment. United States. https://doi.org/10.1039/C5NR03714J
Zang, Huidong, Cristea, Mihail, Shen, Xuan, Liu, Mingzhao, Camino, Fernando, and Cotlet, Mircea. 2015.
"Charge trapping and de-trapping in isolated CdSe/ZnS nanocrystals under an external electric field: Indirect evidence for a permanent dipole moment". United States. https://doi.org/10.1039/C5NR03714J. https://www.osti.gov/servlets/purl/1213388.
@article{osti_1213388,
title = {Charge trapping and de-trapping in isolated CdSe/ZnS nanocrystals under an external electric field: Indirect evidence for a permanent dipole moment},
author = {Zang, Huidong and Cristea, Mihail and Shen, Xuan and Liu, Mingzhao and Camino, Fernando and Cotlet, Mircea},
abstractNote = {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.},
doi = {10.1039/C5NR03714J},
url = {https://www.osti.gov/biblio/1213388},
journal = {Nanoscale},
issn = {2040-3364},
number = 1,
volume = 92,
place = {United States},
year = {Wed Aug 05 00:00:00 EDT 2015},
month = {Wed Aug 05 00:00:00 EDT 2015}
}
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