Copper Nanowire Plasmonic Effect for Improving the Performance of Inverted Polymer Solar Cell

Hierarchical structure of copper nanowires (Cu NWs) was formed by using simple solution process through hydrothermal approach, with an average length and diameter of 6 +/- 2 mu m and 120 +/- 15 nm respectively. The size and morphology of Cu NW was dependent on the reaction time. An extinction peak was observed at 560 nm indicate the possibility of Cu NW plasmonic effect. The absorption spectrum shows improvement over a wavelength range of 450 nm to 650 nm, due to the plasmonic effect of Cu NW in PEDOT:PSS with active layer. (C) 2014 Published by Elsevier Ltd.