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Development and study of hybrid organic-colloidal quantum dot systems - art. no. 647007

Bourdakos, KN, Dissanayake, DMN and Curry, RJ (2007) Development and study of hybrid organic-colloidal quantum dot systems - art. no. 647007 Organic Photonic Materials and Devices IX, 6470. 47007 - 47007. ISSN 0277-786X

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Abstract

We show that in the presence of fullerene complexes the optical properties of PbS QDs are significantly modified. The absorption of the PbS QDs is observed to shift to a higher energy when fullerene complexes are introduced. Upon direct excitation of the PbS below the fullerene absorption a corresponding blue shift in PL spectra of the PbS QDs is observed. The strength of this blue-shift can be related to the fullerene concentration in most cases and is accompanied by a broadening of the emission spectrum. When exciting the samples at high energy 3.4 eV (363 mn) the strength of these effects is increased with a maximum blue-shift in the PL spectrum of 261 meV and 167 meV occurring for the C60 and PCBM doped samples respectively. The origin of the observed behavior cannot be confirmed at this time and is the focus of ongoing studies. However, we briefly discuss the results obtained in relation to the strong electron accepting nature of the fullerene complexes used.

Item Type: Article
Additional Information: Copyright 2011 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. Konstantinos Bourdakos, D.M.Nanditha Dissanayake, Richard J. Curry, "Development and study of hybrid organic-colloidal quantum dot systems", Proc. SPIE 6470, Organic Photonic Materials and Devicex IX, 647007 (2007); doi:10.1117/12.700608
Uncontrolled Keywords: fullerene, quantum dot, PbS, LIGHT-EMITTING-DIODES, SEMICONDUCTOR NANOCRYSTALS, SOLAR-CELLS, COMPOSITES, PBSE, ELECTROLUMINESCENCE, PHOTOCONDUCTIVITY, EMISSION, ENERGY, FILMS
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute
Depositing User: Symplectic Elements
Date Deposited: 13 Nov 2012 09:59
Last Modified: 23 Sep 2013 19:47
URI: http://epubs.surrey.ac.uk/id/eprint/732928

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