FRONT AND BACK CONTACT ELECTRIC FIELD SOLAR CELL AND METHOD THEREOF

摘要

PURPOSE: A solar cell having front and back surface fields and a manufacturing method thereof are provided to reduce recombination loss of photoproduced carriers by forming a floating junction layer within an emitter and a back surface field. CONSTITUTION: A second conductive type emitter is formed on an upper layer portion of a substrate. A first floating junction layer of a first conductivity type is prepared in a part of a region where an emitter is formed. A first anti-reflection film(204) is included on the upper layer portion of the emitter and the first floating junction layer. A front electrode(205) contacts the emitter. A back surface field of the first conductivity type is included in the lower layer portion of the substrate. A second floating junction layer(207) of a second conductive type is included in a part of the region where the back surface field is formed. A second anti-reflection film is included on the upper layer portion of the back surface field and the second floating junction layer. A back electrode(209) contacts the back surface field.