Characterization of effective charge carrier mobility in ZnPc/C60 solar cells after ageing

We have investigated the ageing of ZnPc/C60 solar cells in terms of changes of the charge carrier mobility and potential barrier height. The initial fast degradation of device performance within several hours was followed by a much slower one. The mobility decreases during degradation by about 30 to...

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Bibliographic Details
Main Authors: Kažukauskas, V, Arlauskas, A, Pranaitis, M, Lessmann, R, Riede, M, Leo, K
Format: Journal article
Language:English
Published: Wiley 2009
Description
Summary:We have investigated the ageing of ZnPc/C60 solar cells in terms of changes of the charge carrier mobility and potential barrier height. The initial fast degradation of device performance within several hours was followed by a much slower one. The mobility decreases during degradation by about 30 to 50 %. Moreover, an increase of the effective barrier height at ZnPC/C60 interface from ∼0.55 eV up to ∼0.65 eV was observed. Meanwhile thermal activation energy values of the electrical conductivity grew from about 0.28 eV to about 0.34 eV after ageing. © 2009 Wiley-VCH Verlag GmbH and Co. KGaA.