Plasmonic oligomers as effective red light scatterers to enhance the performance of organic solar cells

The current work proposes to incorporate gold nano-particle dimers and trimers inside the OPV device. The plasmon resonance of coupled particles shifts towards the red part of the spectrum where the losses of gold are much smaller. It can be theoretically show that the scattering over extinction cross-section of such oligomers is strongly reduced and leads to a significant increase of the light harvesting in the active material.