About the transparent electrode of the organic photovoltaic cells J.-C. Bernède, D.-T. Nguyen, L. Cattin, M. Morsli, S.R.B. Kanth and S. Patil Eur. Phys. J. Appl. Phys., 56 3 (2011) 34102 Published online: 23 November 2011 DOI: 10.1051/epjap/2011110120