A simple strategy to achieve shape control of Au-Cu2-xS colloidal heterostructured nanocrystals and their preliminary use in organic photovoltaics

Au-Cu2-xS Janus nanostructures with a shape-controlled semiconductor part are successfully built. The key parameters for controlling the morphology of Cu2-xS in Au-Cu2-xS are demonstrated. Coupled local surface plasmon resonance (LSPR) properties in these Au-Cu2-xS NCs give them potential for application in polymer solar cells (PSCs) as an efficient dopant.