SOLAR CELL ELEMENT AND MANUFACTURING METHOD FOR SAME

摘要

The present invention relates to a solar cell element and a manufacturing method for same. The solar cell element, according to the present invention, comprises: a substrate which transmits light; a first electrode, which is formed on the substrate and made of conductive and light-transmitting material, and which comprises a plurality of nano branch structures, each of which has a nano-scale tree branch shape; a photoactive layer, which is formed on the first electrode provided with an electron donor and an electron acceptor; and a second electrode, which is formed on the photoactive layer made of a conductive material. Tthe present invention can increase light pathways in the photoactive layer by having a plurality of nano branch structures, in which the first electrode effectively expands and scatters incident light, and thereby can improve the efficiency of the solar cell element by increasing the amount of light absorbed in the photoactive layer. Further, as the photoactive layer is formed on the upper surface of the first electrode with the nano branch structure of the first electrode embedded therein, the present invention can rapidly transfer an electron charge generated in the interior of the photoactive layer to the nano branch structure of the first electrode, thereby further improving the efficiency of the solar cell element.