Abstract
We study inverted core-shell nanocrystals (NCs), in which a core of a wide-gap semiconductor (ZnSe) is overcoated with a shell of a narrower gap material (CdSe). Depending on the core radius and the shell thickness, these NCs can exhibit either type-I or type-II behavior. We show that these heterostructures can be used to significantly increase the absorption cross sections and simultaneously decrease the efficiency of Auger recombination compared to monocomponent CdSe NCs emitting at the same wavelength. These properties enhance the lasing performance of inverted core-shell structures and allow, in particular, efficient amplified spontaneous emission in the range of blue colors.
| Original language | English |
|---|---|
| Article number | 034309 |
| Journal | Journal of Applied Physics |
| Volume | 99 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Feb 1 2006 |
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ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Physics and Astronomy(all)
Cite this
Absorption cross sections and Auger recombination lifetimes in inverted core-shell nanocrystals : Implications for lasing performance. / Nanda, J.; Ivanov, S. A.; Htoon, H.; Bezel, I.; Piryatinski, A.; Tretiak, S.; Klimov, Victor I.
In: Journal of Applied Physics, Vol. 99, No. 3, 034309, 01.02.2006.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Absorption cross sections and Auger recombination lifetimes in inverted core-shell nanocrystals
T2 - Implications for lasing performance
AU - Nanda, J.
AU - Ivanov, S. A.
AU - Htoon, H.
AU - Bezel, I.
AU - Piryatinski, A.
AU - Tretiak, S.
AU - Klimov, Victor I
PY - 2006/2/1
Y1 - 2006/2/1
N2 - We study inverted core-shell nanocrystals (NCs), in which a core of a wide-gap semiconductor (ZnSe) is overcoated with a shell of a narrower gap material (CdSe). Depending on the core radius and the shell thickness, these NCs can exhibit either type-I or type-II behavior. We show that these heterostructures can be used to significantly increase the absorption cross sections and simultaneously decrease the efficiency of Auger recombination compared to monocomponent CdSe NCs emitting at the same wavelength. These properties enhance the lasing performance of inverted core-shell structures and allow, in particular, efficient amplified spontaneous emission in the range of blue colors.
AB - We study inverted core-shell nanocrystals (NCs), in which a core of a wide-gap semiconductor (ZnSe) is overcoated with a shell of a narrower gap material (CdSe). Depending on the core radius and the shell thickness, these NCs can exhibit either type-I or type-II behavior. We show that these heterostructures can be used to significantly increase the absorption cross sections and simultaneously decrease the efficiency of Auger recombination compared to monocomponent CdSe NCs emitting at the same wavelength. These properties enhance the lasing performance of inverted core-shell structures and allow, in particular, efficient amplified spontaneous emission in the range of blue colors.
UR - http://www.scopus.com/inward/record.url?scp=33645507751&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=33645507751&partnerID=8YFLogxK
U2 - 10.1063/1.2168032
DO - 10.1063/1.2168032
M3 - Article
VL - 99
JO - Journal of Applied Physics
JF - Journal of Applied Physics
SN - 0021-8979
IS - 3
M1 - 034309
ER -