Journal of Physical Chemistry C, volume 118, issue 37, pages 21682-21686
Ultra Long-Lived Radiative Trap States in CdSe Quantum Dots
Mohamed Abdellah
1, 2
,
Khadga J. Karki
1
,
Nils Lenngren
1
,
Kaibo Zheng
1
,
Torbjörn Pascher
1
,
Arkady Yartsev
1
,
Publication type: Journal Article
Publication date: 2014-09-05
Journal:
Journal of Physical Chemistry C
Q1
Q3
SJR: 0.957
CiteScore: 6.5
Impact factor: 3.3
ISSN: 19327447, 19327455
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Physical and Theoretical Chemistry
General Energy
Abstract
Surface states and traps play an important role in the photophysics of colloidal quantum dots. These states typically lead to large red-shifted photoluminescence. We have used steady-state and time-resolved spectroscopic techniques to investigate the nature of the traps and their lifetimes in colloidal CdSe quantum dots. We conclude that at least two different types of traps contribute to the photoluminescence. The trapping is more pronounced at higher excitation energies compared to the band edge excitation. Hole trapping is dominant in CdSe quantum dots. The time-resolved photoluminescence and pump–probe measurements show that the trapped holes live for longer than tens of microseconds at room temperature.
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GOST
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Abdellah M. et al. Ultra Long-Lived Radiative Trap States in CdSe Quantum Dots // Journal of Physical Chemistry C. 2014. Vol. 118. No. 37. pp. 21682-21686.
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Abdellah M., Karki K. J., Lenngren N., Zheng K., Pascher T., Yartsev A., Pullerits T. Ultra Long-Lived Radiative Trap States in CdSe Quantum Dots // Journal of Physical Chemistry C. 2014. Vol. 118. No. 37. pp. 21682-21686.
Cite this
RIS
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TY - JOUR
DO - 10.1021/jp506536h
UR - https://doi.org/10.1021/jp506536h
TI - Ultra Long-Lived Radiative Trap States in CdSe Quantum Dots
T2 - Journal of Physical Chemistry C
AU - Abdellah, Mohamed
AU - Karki, Khadga J.
AU - Lenngren, Nils
AU - Zheng, Kaibo
AU - Pascher, Torbjörn
AU - Yartsev, Arkady
AU - Pullerits, Tönu
PY - 2014
DA - 2014/09/05
PB - American Chemical Society (ACS)
SP - 21682-21686
IS - 37
VL - 118
SN - 1932-7447
SN - 1932-7455
ER -
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BibTex (up to 50 authors)
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@article{2014_Abdellah,
author = {Mohamed Abdellah and Khadga J. Karki and Nils Lenngren and Kaibo Zheng and Torbjörn Pascher and Arkady Yartsev and Tönu Pullerits},
title = {Ultra Long-Lived Radiative Trap States in CdSe Quantum Dots},
journal = {Journal of Physical Chemistry C},
year = {2014},
volume = {118},
publisher = {American Chemical Society (ACS)},
month = {sep},
url = {https://doi.org/10.1021/jp506536h},
number = {37},
pages = {21682--21686},
doi = {10.1021/jp506536h}
}
Cite this
MLA
Copy
Abdellah, Mohamed, et al. “Ultra Long-Lived Radiative Trap States in CdSe Quantum Dots.” Journal of Physical Chemistry C, vol. 118, no. 37, Sep. 2014, pp. 21682-21686. https://doi.org/10.1021/jp506536h.