@ARTICLE {20261,
author={J. Farinhas and R. Oliveira and Q.  Ferreira and J. Morgado and A. Charas},
doi={10.1155/2017/4501758},
journal={International Journal of Photoenergy},
title={Enhanced Efficiency of PTB7 : PC61BM Organic Solar Cells by Adding a Low Efficient Polymer Donor},
year={2017},
month={January},
volume={2017},
number={-},
pages={1-8},
ISSN={1110-662X}
}