Drastic difference between hole and electron injection through the gradient shell of CdxSeyZn1-x S1-y quantum dots

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Standard

Drastic difference between hole and electron injection through the gradient shell of CdxSeyZn1-x S1-y quantum dots. / Abdellah, Mohamed; Poulsen, Felipe Mathias Godoy; Zhu, Qiushi; Zhu, Nan; Zidek, Karel; Chabera, Pavel; Corti, Annamaria; Hansen, Thorsten; Chi, Qijin; Canton, Sophie E.; Zheng, Kaibo; Pullerits, Tonu.

I: Nanoscale, Bind 9, Nr. 34, 2017, s. 12503-12508.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Abdellah, M, Poulsen, FMG, Zhu, Q, Zhu, N, Zidek, K, Chabera, P, Corti, A, Hansen, T, Chi, Q, Canton, SE, Zheng, K & Pullerits, T 2017, 'Drastic difference between hole and electron injection through the gradient shell of CdxSeyZn1-x S1-y quantum dots', Nanoscale, bind 9, nr. 34, s. 12503-12508. https://doi.org/10.1039/c7nr04495j

APA

Abdellah, M., Poulsen, F. M. G., Zhu, Q., Zhu, N., Zidek, K., Chabera, P., Corti, A., Hansen, T., Chi, Q., Canton, S. E., Zheng, K., & Pullerits, T. (2017). Drastic difference between hole and electron injection through the gradient shell of CdxSeyZn1-x S1-y quantum dots. Nanoscale, 9(34), 12503-12508. https://doi.org/10.1039/c7nr04495j

Vancouver

Abdellah M, Poulsen FMG, Zhu Q, Zhu N, Zidek K, Chabera P o.a. Drastic difference between hole and electron injection through the gradient shell of CdxSeyZn1-x S1-y quantum dots. Nanoscale. 2017;9(34):12503-12508. https://doi.org/10.1039/c7nr04495j

Author

Abdellah, Mohamed ; Poulsen, Felipe Mathias Godoy ; Zhu, Qiushi ; Zhu, Nan ; Zidek, Karel ; Chabera, Pavel ; Corti, Annamaria ; Hansen, Thorsten ; Chi, Qijin ; Canton, Sophie E. ; Zheng, Kaibo ; Pullerits, Tonu. / Drastic difference between hole and electron injection through the gradient shell of CdxSeyZn1-x S1-y quantum dots. I: Nanoscale. 2017 ; Bind 9, Nr. 34. s. 12503-12508.

Bibtex

@article{34056237f5f748c785424af1ca3beffc,
title = "Drastic difference between hole and electron injection through the gradient shell of CdxSeyZn1-x S1-y quantum dots",
abstract = "Ultrafast fluorescence spectroscopy was used to investigate the hole injection in CdxSeyZn1−xS1−y gradient core–shell quantum dot (CSQD) sensitized p-type NiO photocathodes. A series of CSQDs with a wide range of shell thicknesses was studied. Complementary photoelectrochemical cell measurements werecarried out to confirm that the hole injection from the active core through the gradient shell to NiO takes place. The hole injection from the valence band of the QDs to NiO depends much less on the shell thickness when compared to the corresponding electron injection to n-type semiconductor (ZnO). We simulatethe charge carrier tunneling through the potential barrier due to the gradient shell by numerically solving the Schr{\"o}dinger equation. The details of the band alignment determining the potential barrier are obtained from X-ray spectroscopy measurements. The observed drastic differences between the hole and electron injection are consistent with a model where the hole effective mass decreases, while the gradient shell thickness increases.",
author = "Mohamed Abdellah and Poulsen, {Felipe Mathias Godoy} and Qiushi Zhu and Nan Zhu and Karel Zidek and Pavel Chabera and Annamaria Corti and Thorsten Hansen and Qijin Chi and Canton, {Sophie E.} and Kaibo Zheng and Tonu Pullerits",
year = "2017",
doi = "10.1039/c7nr04495j",
language = "English",
volume = "9",
pages = "12503--12508",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "34",

}

RIS

TY - JOUR

T1 - Drastic difference between hole and electron injection through the gradient shell of CdxSeyZn1-x S1-y quantum dots

AU - Abdellah, Mohamed

AU - Poulsen, Felipe Mathias Godoy

AU - Zhu, Qiushi

AU - Zhu, Nan

AU - Zidek, Karel

AU - Chabera, Pavel

AU - Corti, Annamaria

AU - Hansen, Thorsten

AU - Chi, Qijin

AU - Canton, Sophie E.

AU - Zheng, Kaibo

AU - Pullerits, Tonu

PY - 2017

Y1 - 2017

N2 - Ultrafast fluorescence spectroscopy was used to investigate the hole injection in CdxSeyZn1−xS1−y gradient core–shell quantum dot (CSQD) sensitized p-type NiO photocathodes. A series of CSQDs with a wide range of shell thicknesses was studied. Complementary photoelectrochemical cell measurements werecarried out to confirm that the hole injection from the active core through the gradient shell to NiO takes place. The hole injection from the valence band of the QDs to NiO depends much less on the shell thickness when compared to the corresponding electron injection to n-type semiconductor (ZnO). We simulatethe charge carrier tunneling through the potential barrier due to the gradient shell by numerically solving the Schrödinger equation. The details of the band alignment determining the potential barrier are obtained from X-ray spectroscopy measurements. The observed drastic differences between the hole and electron injection are consistent with a model where the hole effective mass decreases, while the gradient shell thickness increases.

AB - Ultrafast fluorescence spectroscopy was used to investigate the hole injection in CdxSeyZn1−xS1−y gradient core–shell quantum dot (CSQD) sensitized p-type NiO photocathodes. A series of CSQDs with a wide range of shell thicknesses was studied. Complementary photoelectrochemical cell measurements werecarried out to confirm that the hole injection from the active core through the gradient shell to NiO takes place. The hole injection from the valence band of the QDs to NiO depends much less on the shell thickness when compared to the corresponding electron injection to n-type semiconductor (ZnO). We simulatethe charge carrier tunneling through the potential barrier due to the gradient shell by numerically solving the Schrödinger equation. The details of the band alignment determining the potential barrier are obtained from X-ray spectroscopy measurements. The observed drastic differences between the hole and electron injection are consistent with a model where the hole effective mass decreases, while the gradient shell thickness increases.

U2 - 10.1039/c7nr04495j

DO - 10.1039/c7nr04495j

M3 - Journal article

C2 - 28819669

VL - 9

SP - 12503

EP - 12508

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 34

ER -

ID: 186747002