Patent ID: 8513754

Claim:
A solar cell, comprising: a substrate of a first conductive type; an emitter layer that is positioned on the substrate and is a second conductive type that is opposite to the first conductive type; first electrodes that are connected to the emitter layer; and a second electrode that is connected to the substrate, wherein the emitter layer comprises a first emitter portion and a second emitter portion, the first electrodes comprise a finger electrode, and a bus electrode intersecting and connected to the finger electrode, the first emitter portion and the second emitter portion are positioned under the bus electrode, the plurality of finger electrodes and the plurality of bus electrode are formed on a surface of the substrate and are coplanar, and the plurality of first emitter portions extend from the surface of the substrate to a first doped depth, and the plurality of second emitter portions extend from the surface of the substrate to a second doped depth that is different from the first doped depth.