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 nano-membranes 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 nano-membrane 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.