Patent ID: 8334163

Claim:
A method of forming solar cell, comprising: providing a semiconductor substrate having a first surface and a second surface, wherein the first surface having a selective emitter region; forming a doping paste on the selective emitter region of the first surface of the semiconductor substrate, wherein the doping paste comprises a doping agent, a high temperature resistant material and an organic solvent; forming a texturing barrier layer on the second surface of the semiconductor substrate; performing a texturing treatment on the semiconductor substrate to make the first surface of the semiconductor substrate, which is outside the selective emitter region and uncovered by the doping paste, form a textured surface, and to make the second surface of the semiconductor substrate form an even surface; performing a diffusion process to make the doping agent of the doping paste on the selective emitter region diffuse downwardly into the semiconductor substrate to form a selective emitter which is heavily-doped, and introducing a doping gas during the diffusion process to form a lightly-doped region in the first surface outside the selective emitter region, wherein the selective emitter and the lightly-doped region have a first doping type; removing the texturing barrier layer and the doping paste; forming an anti-reflection layer on the first surface of the semiconductor layer; forming a first electrode on the selective emitter in the selective emitter region; forming a doped region in the second surface of the semiconductor substrate, wherein the doped region has a second doping type opposite to the first doping type; and forming a second electrode on the second surface of the semiconductor substrate.