ACS Nano, volume 6, issue 9, pages 8448-8455
A charge-orbital balance picture of doping in colloidal quantum dot solids.
Oleksandr Voznyy
1
,
David Zhitomirsky
1
,
Philipp Stadler
1
,
Zhijun Ning
1
,
Sjoerd Hoogland
1
,
Edward H Sargent
1
Publication type: Journal Article
Publication date: 2012-09-07
Journal:
ACS Nano
scimago Q1
SJR: 4.593
CiteScore: 26.0
Impact factor: 15.8
ISSN: 19360851, 1936086X
PubMed ID:
22928602
General Physics and Astronomy
General Materials Science
General Engineering
Abstract
We present a framework--validated using both modeling and experiment--to predict doping in CQD films. In the ionic semiconductors widely deployed in CQD films, the framework reduces to a simple accounting of the contributions of the oxidation state of each constituent, including both inorganic species and organic ligands. We use density functional theory simulations to confirm that the type of doping can be reliably predicted based on the overall stoichiometry of the CQDs, largely independent of microscopic geometrical bonding configurations. Studies employing field-effect transistors constructed from CQDs that have undergone various chemical treatments, coupled with Rutherford backscattering and X-ray photoelectron spectroscopy to provide compositional analysis, allow us to test and confirm the proposed model in an experimental framework. We investigate both p- and n-type electronic doping spanning a wide range of carrier concentrations from 10(16) cm(-3) to over 10(18) cm(-3), and demonstrate reversible switching between p- and n-type doping by changing the CQD stoichiometry. We show that the summation of the contributions from all cations and anions within the film can be used to predict accurately the majority carrier type. The findings enable predictable control over majority carrier concentration via tuning of the overall stoichiometry.
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Voznyy O. et al. A charge-orbital balance picture of doping in colloidal quantum dot solids. // ACS Nano. 2012. Vol. 6. No. 9. pp. 8448-8455.
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Voznyy O., Zhitomirsky D., Stadler P., Ning Z., Hoogland S., Sargent E. H. A charge-orbital balance picture of doping in colloidal quantum dot solids. // ACS Nano. 2012. Vol. 6. No. 9. pp. 8448-8455.
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TY - JOUR
DO - 10.1021/nn303364d
UR - https://doi.org/10.1021/nn303364d
TI - A charge-orbital balance picture of doping in colloidal quantum dot solids.
T2 - ACS Nano
AU - Voznyy, Oleksandr
AU - Zhitomirsky, David
AU - Stadler, Philipp
AU - Ning, Zhijun
AU - Hoogland, Sjoerd
AU - Sargent, Edward H
PY - 2012
DA - 2012/09/07
PB - American Chemical Society (ACS)
SP - 8448-8455
IS - 9
VL - 6
PMID - 22928602
SN - 1936-0851
SN - 1936-086X
ER -
Cite this
BibTex (up to 50 authors)
Copy
@article{2012_Voznyy,
author = {Oleksandr Voznyy and David Zhitomirsky and Philipp Stadler and Zhijun Ning and Sjoerd Hoogland and Edward H Sargent},
title = {A charge-orbital balance picture of doping in colloidal quantum dot solids.},
journal = {ACS Nano},
year = {2012},
volume = {6},
publisher = {American Chemical Society (ACS)},
month = {sep},
url = {https://doi.org/10.1021/nn303364d},
number = {9},
pages = {8448--8455},
doi = {10.1021/nn303364d}
}
Cite this
MLA
Copy
Voznyy, Oleksandr, et al. “A charge-orbital balance picture of doping in colloidal quantum dot solids..” ACS Nano, vol. 6, no. 9, Sep. 2012, pp. 8448-8455. https://doi.org/10.1021/nn303364d.
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Publisher
Journal
scimago Q1
SJR
4.593
CiteScore
26.0
Impact factor
15.8
ISSN
19360851
(Print)
1936086X
(Electronic)