Patent ID: 9548403
Date: 2017-01-17
CPC Classifications: H01L,Y02E

Claim:
1. A solar cell comprising: a substrate of a first conductive type; an emitter region of a second conductive type opposite the first conductive type, which is positioned at the substrate, the emitter region including a plurality of first emitter regions having a first sheet resistance and a plurality of second emitter regions having a second sheet resistance less than the first sheet resistance; an anti-reflection layer including a plurality of first opening lines extending in a first direction and separated from one another in a second direction crossing the first direction, which is positioned on the emitter region and exposes the plurality of second emitter regions, and a plurality of second opening lines extending in the second direction, which expose the plurality of second emitter regions and are separated from one another in the first direction, each of the first and second opening lines having the same width; a plurality of first electrodes which are positioned on the plurality of second emitter regions exposed through the plurality of first opening lines and are connected to the plurality of second emitter regions, one first electrode of the plurality of first electrodes positioned on one first opening line of the plurality of first opening lines; a first bus bar including a plurality of lower portions formed through the plurality of second opening lines and connected to the plurality of second emitter regions, and an upper portion formed on the anti-reflection layer and connected to the plurality of lower portions and the plurality of first electrodes; and a second electrode which is positioned on the substrate and is connected to the substrate, wherein a portion of the anti-reflection layer is positioned between the first bus bar and the plurality of first emitter regions.