KETEP 세계에너지시장정보

A solar cell, comprising: a substrate (100) having a front surface and a rear surface opposite to each other, the front surface including a metal pattern region and a non-metal pattern region; a first tunnel layer (110) and a first doped conductive layer (120) sequentially formed over the front surface of the substrate (100) in a first direction away from the substrate (100), wherein the first tunnel layer (110) and the first doped conductive layer (120) are each only in the metal pattern region, and the first doped conductive layer (120) comprises a first doping element of a same type as that of a doping element in the substrate (100); and a second tunnel layer (140) and a second doped conductive layer (150) sequentially formed over the rear surface of the substrate (100) in a second direction opposite to the first direction, wherein the second doped conductive layer (150) comprises a second doping element of a different type from that of the first doping element in the first doped conductive layer (120), and characterized in that a full width at half maximum of a first peak of a Raman spectrum for the first doped conductive layer (120) is smaller than a full width at half maximum of a first peak of a Raman spectrum for the second doped conductive layer (150), and a crystallite size of the first doped conductive layer (120) is larger than a crystallite size of the second doped conductive layer (150).