Patent ID: 10276733

Abstract:
The solar cell (10) of the present invention comprises: a first electrode (21) including a plurality of finger portions (21a), and a busbar portion (21b) connected electrically to the plurality of finger portions (21a), each of the plurality of finger portions (21a) extending along a first direction (y), and the plurality of finger portions (21a) being arrayed along a second direction (x) perpendicular to the first direction (y) leaving gaps therebetween; and a plurality of protruding portions (23) provided on at least one side of a first main surface (20A) in the first direction (y) of the busbar portion (21b). The plurality of protruding portions (23) are provided so that the total perimeter of the protruding portions (23) per unit area at the ends of the first main surface (20A) in the second direction (x) is longer than the total perimeter of the protruding portions (23) per unit area in the central portion. By means of these characteristics, the solar cell of the present invention is able to effectively suppress delamination of wiring material (11) by suppressing delamination of the ends, which is where delamination of the wiring material begins when the wiring material (11) is connected to the busbar.