Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Andrey A. Lutich
  • Christian Mauser
  • Enrico Da Como
  • Jing Huang
  • Aleksandar Vaneski
  • Dmitri V. Talapin
  • Jochen Feldmann

Detail(s)

Original languageEnglish
Pages (from-to)4646-4650
Journal / PublicationNano Letters
Volume10
Issue number11
Publication statusPublished - 10 Nov 2010

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. © 2010 American Chemical Society.

Research Area(s)

  • Auger recombination, dual emission, Multiexcitons, nanocrystals, tetrapods

Citation Format(s)

Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods. / Lutich, Andrey A.; Mauser, Christian; Da Como, Enrico; Huang, Jing; Vaneski, Aleksandar; Talapin, Dmitri V.; Rogach, Andrey L.; Feldmann, Jochen.

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

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review