Gold and silver core-shell nanoparticles for light absorption enhancement of organic solar cells

To increase light absorption without altering the thickness of active layer for OPV, rough surface Au@Ag core-shell nanoparticle (RSAu@Ag NPs) was prepared. Direct incorporation of RSAu@Ag NPs at the bottom of active layer improved the light absorption because of scattering power and board spectral response of Au NPs.