In-situ conductivity and Seebeck measurements of highly efficient n-dopants in fullerene C60
- 27 February 2012
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 100 (9)
- https://doi.org/10.1063/1.3689778
Abstract
We present two organic dimetal complexes Cr2(hpp)4 and W2(hpp)4 as n-dopants investigated in the model system of fullerene C60 for the application in organic electronic devices. Conductivity and Seebeck measurements on doped layers are carried out in vacuum at different doping concentrations and various substrate temperatures to compare the two dopants. Very high conductivities of up to 4 S/cm are achieved for both organic dopants. The thermal activation energy of the conductivity as well as the measured Seebeck coefficient are found to decrease with increasing doping concentration, indicating a shift of the Fermi level towards the electron transport level of the n-doped C60.Keywords
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