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Proceedings Paper

Development and study of hybrid organic-colloidal quantum dot systems
Author(s): Konstantinos N. Bourdakos; D. M. Nanditha Dissanayake; Richard J. Curry
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Paper 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 nm) 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.

Paper Details

Date Published: 7 February 2007
PDF: 8 pages
Proc. SPIE 6470, Organic Photonic Materials and Devices IX, 647007 (7 February 2007); doi: 10.1117/12.700608
Show Author Affiliations
Konstantinos N. Bourdakos, Univ. of Surrey (United Kingdom)
D. M. Nanditha Dissanayake, Univ. of Surrey (United Kingdom)
Richard J. Curry, Univ. of Surrey (United Kingdom)

Published in SPIE Proceedings Vol. 6470:
Organic Photonic Materials and Devices IX
James G. Grote; Francois Kajzar; Nakjoong Kim, Editor(s)

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