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Auger Recombination of Biexcitons and Charged Excitons in CdSe/CdS core/shell Nanocrystals

Published online by Cambridge University Press:  27 February 2012

Marco Marceddu ,
Michele Saba ,
Francesco Quochi ,
Adriano Lai ,
Jing Huang ,
Dmitri V. Talapin ,
Andrea Mura  and
Giovanni Bongiovanni
Marco Marceddu
Affiliation:
Centro Grandi Strumenti d’Ateneo, Università di Cagliari, I-09042 Monserrato (CA), Italy
Michele Saba
Affiliation:
Dipartimento di Fisica, Università di Cagliari, I-09042 Monserrato (CA), Italy
Francesco Quochi
Affiliation:
Dipartimento di Fisica, Università di Cagliari, I-09042 Monserrato (CA), Italy
Adriano Lai
Affiliation:
Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, I-09042 Monserrato, Italy
Jing Huang
Affiliation:
Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA
Dmitri V. Talapin
Affiliation:
Department of Chemistry, The University of Chicago, Chicago, IL 60637, USA
Andrea Mura
Affiliation:
Dipartimento di Fisica, Università di Cagliari, I-09042 Monserrato (CA), Italy Istituto Officina dei Materiali del Consiglio Nazionale delle Ricerche (CNR-IOM) Unità SLACS, I-09042 Monserrato (CA), Italy
Giovanni Bongiovanni
Affiliation:
Dipartimento di Fisica, Università di Cagliari, I-09042 Monserrato (CA), Italy Istituto Officina dei Materiali del Consiglio Nazionale delle Ricerche (CNR-IOM) Unità SLACS, I-09042 Monserrato (CA), Italy
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Abstract

CdSe/CdS colloidal nanocrystals are light-emitting nanoparticles with remarkable optical properties such as suppressed fluorescence blinking and enhanced emission from multiexciton states. These properties have been attributed to the suppression of non-radiative Auger recombination. In this work we employ ultrafast spectroscopy techniques to identify optical signatures of neutral and charged excitonic and multiexcitonic states.

Keywords

optical propertiescore/shellluminescence
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1409: Symposium CC – Functional Semiconductor Nanocrystals and Metal-Hybrid Structures , 2012 , mrsf11-1409-cc11-04
Copyright
Copyright © Materials Research Society 2012

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References

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