Optimisation of the interface “organic material/aluminium” of CuPc/C60 based photovoltaic cells Y. Berredjem, N. Karst, A. Boulmokh, A. Drici and J. C. Bernède Eur. Phys. J. Appl. Phys., 40 2 (2007) 163-167 Published online: 31 October 2007 DOI: 10.1051/epjap:2007145