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Multiexcitons in a Single Core-Shell Colloidal Quantum dots

Published online by Cambridge University Press:  31 January 2011

Dima Cheskis ,
Ruth Osovsky ,
Viki Kloper ,
Aldona Sashchiuk  and
Efrat Lifshitz
Dima Cheskis
Affiliation:
dimach@post.tau.ac.il, Technion - Israel Institute of Technology, Schulich Faculty of Chemistry, Haifa, Israel
Ruth Osovsky
Affiliation:
dimacheskis@gmail.com, Technion - Israel Institute of Technology, Schulich Faculty of Chemistry, Haifa, Israel
Viki Kloper
Affiliation:
dimach@tx.technion.ac.il, Technion - Israel Institute of Technology, Schulich Faculty of Chemistry, Haifa, Israel
Aldona Sashchiuk
Affiliation:
dimach@techunix.technion.ac.il, Technion - Israel Institute of Technology, Schulich Faculty of Chemistry, Haifa, Israel
Efrat Lifshitz
Affiliation:
ssefrat@tx.technion.ac.il, Technion - Israel Institute of Technology, Schulich Faculty of Chemistry, Haifa, Israel
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Abstract

The micro-photoluminescence (μ-PL) spectra of a single CdTe/CdSe quasi- type II core-shell colloidal quantum dots (CQDs) unambiguously reveal an emission of a biexciton (2X), a triexciton (3X) and a quadraexciton (4X) under continuous-wave excitation. The CQDs were characterized by optical measurements and theoretical consideration of carrier's wavefunctions distribution of a quasi-type II core-shell structure.

Keywords

nanostructurecore/shellcolloid
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1207: Symposium N – Colloidal Nanoparticles for Electronic Applications — Light Emission, Detection, Photovoltaics and Transport , 2009 , 1207-N05-10
Copyright
Copyright © Materials Research Society 2010

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