Physical Review B, volume 72, issue 19, publication number 195312

Time-resolved intraband relaxation of strongly confined electrons and holes in colloidal PbSe nanocrystals

Jeffrey M. Harbold 1
Hui Du 2
Hui Du 2
Todd D Krauss 2
Todd Krauss 2
Kyung-Sang Cho 3
Chris B Murray 3
Chris Murray 3
Frank W Wise 1
Frank Wise Frank Wise 1
2
 
Department of Chemistry, University of Rochester, Rochester, New York 14627, USA
3
 
IBM, T. J. Watson Research Center, Yorktown Heights, New York 10598, USA
Publication typeJournal Article
Publication date2005-11-08
Quartile SCImago
Q1
Quartile WOS
Q2
Impact factor3.7
ISSN24699950, 24699969, 10980121, 1550235X
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Abstract
The relaxation of strongly-confined electrons and holes between 1P and 1S levels in colloidal PbSe nanocrystals has been time-resolved using femtosecond transient absorption spectroscopy. In contrast to II-VI and III-V semiconductor nanocrystals, both electrons and holes are strongly confined in PbSe nanocrystals. Despite the large electron and hole energy level spacings (at least 12 times the optical phonon energy), we consistently observe picosecond time-scale relaxation. Existing theories of carrier relaxation cannot account for these experimental results. Mechanisms that could possibly circumvent the phonon bottleneck in IV-VI quantum dots are discussed.

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Harbold J. M. et al. Time-resolved intraband relaxation of strongly confined electrons and holes in colloidal PbSe nanocrystals // Physical Review B. 2005. Vol. 72. No. 19. 195312
GOST all authors (up to 50) Copy
Harbold J. M., Du H., Du H., Krauss T. D., Krauss T., Cho K., Murray C. B., Murray C., Wise F. W., Frank Wise F. W. Time-resolved intraband relaxation of strongly confined electrons and holes in colloidal PbSe nanocrystals // Physical Review B. 2005. Vol. 72. No. 19. 195312
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RIS Copy
TY - JOUR
DO - 10.1103/physrevb.72.195312
UR - https://doi.org/10.1103/physrevb.72.195312
TI - Time-resolved intraband relaxation of strongly confined electrons and holes in colloidal PbSe nanocrystals
T2 - Physical Review B
AU - Harbold, Jeffrey M.
AU - Du, Hui
AU - Krauss, Todd D
AU - Cho, Kyung-Sang
AU - Murray, Chris B
AU - Wise, Frank W
AU - Du, Hui
AU - Krauss, Todd
AU - Murray, Chris
AU - Frank Wise, Frank Wise
PY - 2005
DA - 2005/11/08 00:00:00
PB - American Physical Society (APS)
IS - 19
VL - 72
SN - 2469-9950
SN - 2469-9969
SN - 1098-0121
SN - 1550-235X
ER -
BibTex
Cite this
BibTex Copy
@article{2005_Harbold,
author = {Jeffrey M. Harbold and Hui Du and Todd D Krauss and Kyung-Sang Cho and Chris B Murray and Frank W Wise and Hui Du and Todd Krauss and Chris Murray and Frank Wise Frank Wise},
title = {Time-resolved intraband relaxation of strongly confined electrons and holes in colloidal PbSe nanocrystals},
journal = {Physical Review B},
year = {2005},
volume = {72},
publisher = {American Physical Society (APS)},
month = {nov},
url = {https://doi.org/10.1103/physrevb.72.195312},
number = {19},
doi = {10.1103/physrevb.72.195312}
}
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