High Performance Silicon/Organic Hybrid Solar Cells with Dual Localized Surface Plasmonic Effects of Ag and Au Nanoparticles

Effective light trapping induced by a dual localized plasmonic effect of Au and Ag nanoparticles (NPs) is adopted in poly-(3,4-ethylenedioxythiophene):poly (styrenesulfonic acid) (PEDOT:PSS) hybrid solar cells. Superior performance on light absorption is obtained after incorporating mixed Au and Ag NPs incorporating into PEDOT:PSS layer. Compared to devices with single NPs that only shows very limited plasmonic enhancement, dual NPs doped devices benefit from the dual plasmonic enhancement in visible light region. Therefore, power conversion efficiency (PCE) of 11.98 % has been achieved, which is about 18% higher than that of with the pristine one, exhibiting a PCE of 9.72%. The PCE enhancement is largely ascribed to the short-circuit current (J(SC)) enhancement, which can be observed through the external quantum efficiency (EQE) curves. In addition, transient photovoltage (TPV) results show that the charge carrier lifetime is improved by the incorporation of dual nanoparticles, indicating a suppressed charge recombination during the physical process in the devices.