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Microstructure and charge carrier transport in phthalocyanine based

Published online by Cambridge University Press:  31 January 2011

Andreas Opitz ,
Julia Wagner ,
Bernhard Ecker ,
Ulrich Hörmann ,
Michael Kraus ,
Markus Bronner ,
Wolfgang Brütting ,
Alexander Hinderhofer  and
Frank Schreiber
Andreas Opitz
Affiliation:
andreas.opitz@physik.uni-augsburg.de, Institute of Physics, University of Augsburg, Augsburg, Germany
Julia Wagner
Affiliation:
julia.wagner@physik.uni-augsburg.de, Institute of Physics, University of Augsburg, Augsburg, Germany
Bernhard Ecker
Affiliation:
bernhard.ecker@physik-uni-augsburg.de, Institute of Physics, University of Augsburg, Augsburg, Germany
Ulrich Hörmann
Affiliation:
ulrich.hoermann@physik.uni-augsburg.de, Institute of Physics, University of Augsburg, Augsburg, Germany
Michael Kraus
Affiliation:
michael.kraus@physik.uni-augsburg.de, Institute of Physics, University of Augsburg, Augsburg, Germany
Markus Bronner
Affiliation:
markus.bronner@physik.uni-augsburg.de, Institute of Physics, University of Augsburg, Augsburg, Germany
Wolfgang Brütting
Affiliation:
wolfgang.bruetting@physik.uni-augsburg.de, Institute of Physics, University of Augsburg, Augsburg, Germany
Alexander Hinderhofer
Affiliation:
alexander.hinderhofer@uni-tuebingen.de, Institute of Applied Physics, University of Tübingen, Tübingen, Germany
Frank Schreiber
Affiliation:
frank.schreiber@uni-tuebingen.de, Institute of Applied Physics, University of Tübingen, Tübingen, Germany
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Abstract

The continuously growing and wide-spread utilization of blends of organic electron and hole conducting materials comprises ambipolar field-effect transistors as well as organic photovoltaic cells. Structural, optical and electrical properties are investigated in blends and neat films of the electron donor material Cu-phthalocyanine (CuPc) together with fullerene C60 and Cu-hexadecafluorophthalocyanine (F16CuPc) as electron acceptor materials, respectively. The difference in molecular structure of the spherical C60 and the planar molecule CuPc leads to nanophase separation in the blend, causing charge carrier transport which is limited by the successful formation of percolation paths. In contrast, blends of the similar shaped CuPc and F16CuPc molecules entail mixed crystals, as can be clearly seen by X-ray diffraction measurements. We discuss differences of both systems with respect to their microstructure as well as their electrical transport properties.

Keywords

organicphotovoltaicblend
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1154: Symposium B – Concepts in Molecular and Organic Electronics , 2009 , 1154-B09-12
Copyright
Copyright © Materials Research Society 2009

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