Patent ID: 8884158
Filing Date: 2014-11-11
Classification: H01L,Y02E

Abstract:
1. A solar cell, comprising: a substrate of a first conductive type and having a plurality of via holes; the substrate comprising a major plane an emitter layer of a second conductive type opposite the first conductive type disposed on a first surface of the substrate; a plurality of first electrodes electrically connected to the emitter layer and positioned on the first surface of the substrate; a supplementary electrode part directly contacted to an outermost first electrode of the plurality of first electrodes and positioned on the first surface of the substrate; a second electrode electrically connected to the substrate and positioned on a second surface opposite to the first surface of the substrate; a first current collector electrically connected to the plurality of first electrodes through the plurality of via holes and positioned on the second surface of the substrate; and a second current collector positioned on the second surface of the substrate and comprising a plurality of second electrode current collectors and a current collector connector, the plurality of second electrode current collectors being extended in a first direction and electrically connected to the second electrode, and the current collector connector being extended in a second direction crossing the first direction and connecting the plurality of second electrode current collectors to one another, wherein the supplementary electrode part comprises a supplementary electrode and a supplementary connector, the supplementary electrode extends parallel to the plurality of first electrodes, and the supplementary connector extends from the supplementary electrode and contacts to the outermost first electrode of the plurality of first electrodes, and the supplementary electrode part is connected to the first current collector through the outermost first electrode, and a position of the supplementary electrode is overlapped with a position of the current collector connector in a direction perpendicular to the major plane of the substrate and not overlapped in that direction with the plurality of via holes, and a position of the plurality of first electrodes is overlapped with the plurality of via holes in a direction perpendicular to the major plane of the substrate and the plurality of first electrodes are electrically connected to the first current collector through the plurality of via holes.