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

83 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)4646-4650
Number of pages5
JournalNano Letters
Volume10
Issue number11
Early online date22 Oct 2010
DOIs
Publication statusPublished - 10 Nov 2010

Fingerprint Dive into the research topics of 'Multiexcitonic dual emission in CdSe/CdS tetrapods and nanorods'. Together they form a unique fingerprint.

Cite this