Park Y. S., Park H. K., Jeong J. A., Kim H. K., Choi K. H., Nam S. I., Kim D. Y.,
May 2009, Comparative Investigation of Transparent ITO/Ag/ITO and ITO/Cu/ITO Electrodes
Grown by Dual-Target DC Sputtering for Organic Photovoltaics, J. Electrochem. Soc.,
Vol. 156, No. 7, pp. H588-H594