Transparent gold nano-membranes for the enhanced light trapping of the indium tin oxide films

A facile and scalable method for enhancing the light trapping effect of indium tin oxide films on photovoltaic devices is demonstrated. The Langmiur Blodgett technique is introduced to fabricate gold nanomembranes on the photovoltaic solar cells. Textured structures on the indium tin oxide films are created with the nano-membrane, producing effective surface roughness for significantly improved light trapping. As a result, the quantum efficiency of the solar cell integrated with the nanomembrane textured indium tin oxide film is enhanced over a broadband wavelength range, which leads to a 13% enhancement on the photocurrent density and an 8% efficiency enhancement.