Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods

A A Lutich, C Mauser, Enrico Da Como, J Huang, A Vaneski, D V Talapin, A L Rogach, Jochen Feldmann

Research output: Contribution to journalArticle

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Abstract

CdSe/CdS semiconductor nanocrystal heterostructures are currently of high interest for the peculiar electronic structure offering unique optical properties. Here, we show that nanorods and tetrapods made of such material combination enable efficient multiexcitonic emission, when the volume of the nanoparticle is maximized. This condition is fulfilled by tetrapods with an arm length of 55 nm and results in a dual emission with comparable intensities from the CdS arms and CdSe core. The relative intensities of the dual emission, originating from exciton phase-space filling and reduced Auger recombination, can be effectively modulated by the photon fluence of the pump laser. The results, obtained under steady-state detection conditions, highlight the properties of tetrapods as multiexciton dual-color emitters.
LanguageEnglish
Pages4646-4650
Number of pages5
JournalNano Letters
Volume10
Issue number11
Early online date22 Oct 2010
DOIs
StatusPublished - 10 Nov 2010

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Nanorods
Excitons
Nanocrystals
nanorods
Electronic structure
Heterojunctions
Photons
Optical properties
Pumps
Semiconductor materials
Nanoparticles
Color
Lasers
nanocrystals
fluence
emitters
excitons
pumps
electronic structure
color

Cite this

Lutich, A. A., Mauser, C., Da Como, E., Huang, J., Vaneski, A., Talapin, D. V., ... Feldmann, J. (2010). Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods. Nano Letters, 10(11), 4646-4650. https://doi.org/10.1021/nl1028057

Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods. / Lutich, A A; Mauser, C; Da Como, Enrico; Huang, J; Vaneski, A; Talapin, D V; Rogach, A L; Feldmann, Jochen.

In: Nano Letters, Vol. 10, No. 11, 10.11.2010, p. 4646-4650.

Research output: Contribution to journalArticle

Lutich, AA, Mauser, C, Da Como, E, Huang, J, Vaneski, A, Talapin, DV, Rogach, AL & Feldmann, J 2010, 'Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods', Nano Letters, vol. 10, no. 11, pp. 4646-4650. https://doi.org/10.1021/nl1028057
Lutich AA, Mauser C, Da Como E, Huang J, Vaneski A, Talapin DV et al. Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods. Nano Letters. 2010 Nov 10;10(11):4646-4650. https://doi.org/10.1021/nl1028057
Lutich, A A ; Mauser, C ; Da Como, Enrico ; Huang, J ; Vaneski, A ; Talapin, D V ; Rogach, A L ; Feldmann, Jochen. / Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods. In: Nano Letters. 2010 ; Vol. 10, No. 11. pp. 4646-4650.
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