Lanthanide modification of CdSe/ZnS core/shell quantum dots

Research output: Contribution to journal › Journal article › Research › peer-review

Standard

Lanthanide modification of CdSe/ZnS core/shell quantum dots. / Dethlefsen, Johannes Rytter; Mikhailovsky, Alexander A.; Burks, Peter T.; Døssing, Anders Rørbæk; Ford, Peter C.

In: The Journal of Physical Chemistry Part C, Vol. 116, No. 44, 2012, p. 23713-23720.

Research output: Contribution to journal › Journal article › Research › peer-review

Harvard

Dethlefsen, JR, Mikhailovsky, AA, Burks, PT, Døssing, AR & Ford, PC 2012, 'Lanthanide modification of CdSe/ZnS core/shell quantum dots', The Journal of Physical Chemistry Part C, vol. 116, no. 44, pp. 23713-23720. https://doi.org/10.1021/jp306915p

APA

Dethlefsen, J. R., Mikhailovsky, A. A., Burks, P. T., Døssing, A. R., & Ford, P. C. (2012). Lanthanide modification of CdSe/ZnS core/shell quantum dots. The Journal of Physical Chemistry Part C, 116(44), 23713-23720. https://doi.org/10.1021/jp306915p

Vancouver

Dethlefsen JR, Mikhailovsky AA, Burks PT, Døssing AR, Ford PC. Lanthanide modification of CdSe/ZnS core/shell quantum dots. The Journal of Physical Chemistry Part C. 2012;116(44):23713-23720. https://doi.org/10.1021/jp306915p

Author

Dethlefsen, Johannes Rytter ; Mikhailovsky, Alexander A. ; Burks, Peter T. ; Døssing, Anders Rørbæk ; Ford, Peter C. / Lanthanide modification of CdSe/ZnS core/shell quantum dots. In: The Journal of Physical Chemistry Part C. 2012 ; Vol. 116, No. 44. pp. 23713-23720.

Bibtex

@article{e717cb25b4134acca541b9bae94ae675,
title = "Lanthanide modification of CdSe/ZnS core/shell quantum dots",
abstract = "Lanthanide-modified CdSe quantum dots (CdSe(Ln) QDs) have been prepared by heating a solution of Cd(oleate)(2), SeO2, and Ln(bipy)(S2CNEt2)(3) (bipy = 2,2'-bipyridine) to 180-190 degrees C for 10-15 min. The elemental compositions of the resulting CdSe(Ln) cores and CdSe(Ln)/ZnS core/shell QDs show this route to be highly reproducible. The optical absorption spectra of these composite materials are similar to those of the unmodified nanocrystals, but the QD-centered band edge photoluminescence (PL) is partially quenched. The time-gated emission and excitation spectra of the CdSe(Ln) cores display sensitized lanthanide-centered PL upon higher energy excitation of the nanocrystal host but not upon excitation at the lowest energy QD absorption band. Growth of the ZnS shell led to the depletion of about 60% of the lanthanide ions present together with depletion of nearly all of the lanthanide-centered PL. On these bases, we conclude that the lanthanide-centered PL from the CdSe(Ln) cores originates with Ln(3+)-related trap states associated with the QD surface.",
keywords = "cadmium selenide nanocrystals electronic energy levels semiconductor nanocrystals aquo ions precursor nanoparticles complexes dynamics shell",
author = "Dethlefsen, {Johannes Rytter} and Mikhailovsky, {Alexander A.} and Burks, {Peter T.} and D{\o}ssing, {Anders R{\o}rb{\ae}k} and Ford, {Peter C.}",
year = "2012",
doi = "10.1021/jp306915p",
language = "English",
volume = "116",
pages = "23713--23720",
journal = "The Journal of Physical Chemistry Part C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "44",

}

RIS

TY - JOUR

T1 - Lanthanide modification of CdSe/ZnS core/shell quantum dots

AU - Dethlefsen, Johannes Rytter

AU - Mikhailovsky, Alexander A.

AU - Burks, Peter T.

AU - Døssing, Anders Rørbæk

AU - Ford, Peter C.

PY - 2012

Y1 - 2012

N2 - Lanthanide-modified CdSe quantum dots (CdSe(Ln) QDs) have been prepared by heating a solution of Cd(oleate)(2), SeO2, and Ln(bipy)(S2CNEt2)(3) (bipy = 2,2'-bipyridine) to 180-190 degrees C for 10-15 min. The elemental compositions of the resulting CdSe(Ln) cores and CdSe(Ln)/ZnS core/shell QDs show this route to be highly reproducible. The optical absorption spectra of these composite materials are similar to those of the unmodified nanocrystals, but the QD-centered band edge photoluminescence (PL) is partially quenched. The time-gated emission and excitation spectra of the CdSe(Ln) cores display sensitized lanthanide-centered PL upon higher energy excitation of the nanocrystal host but not upon excitation at the lowest energy QD absorption band. Growth of the ZnS shell led to the depletion of about 60% of the lanthanide ions present together with depletion of nearly all of the lanthanide-centered PL. On these bases, we conclude that the lanthanide-centered PL from the CdSe(Ln) cores originates with Ln(3+)-related trap states associated with the QD surface.

AB - Lanthanide-modified CdSe quantum dots (CdSe(Ln) QDs) have been prepared by heating a solution of Cd(oleate)(2), SeO2, and Ln(bipy)(S2CNEt2)(3) (bipy = 2,2'-bipyridine) to 180-190 degrees C for 10-15 min. The elemental compositions of the resulting CdSe(Ln) cores and CdSe(Ln)/ZnS core/shell QDs show this route to be highly reproducible. The optical absorption spectra of these composite materials are similar to those of the unmodified nanocrystals, but the QD-centered band edge photoluminescence (PL) is partially quenched. The time-gated emission and excitation spectra of the CdSe(Ln) cores display sensitized lanthanide-centered PL upon higher energy excitation of the nanocrystal host but not upon excitation at the lowest energy QD absorption band. Growth of the ZnS shell led to the depletion of about 60% of the lanthanide ions present together with depletion of nearly all of the lanthanide-centered PL. On these bases, we conclude that the lanthanide-centered PL from the CdSe(Ln) cores originates with Ln(3+)-related trap states associated with the QD surface.

KW - cadmium selenide nanocrystals electronic energy levels semiconductor nanocrystals aquo ions precursor nanoparticles complexes dynamics shell

U2 - 10.1021/jp306915p

DO - 10.1021/jp306915p

M3 - Journal article

VL - 116

SP - 23713

EP - 23720

JO - The Journal of Physical Chemistry Part C

JF - The Journal of Physical Chemistry Part C

SN - 1932-7447

IS - 44

ER -

ID: 44686794