Abstract: A method of forming bifacial solar cell structure is described. The method comprises: performing boron diffusion on an upper surface of a semiconductor substrate to form a P+ region and a boron silicon glass (BSG) layer on the P+ region; stripping the BSG layer to expose the P+ region and stripping a blocking layer on a lower surface of the semiconductor substrate simultaneously; forming a first anti-reflection coating layer on the P+ region; forming sacrifice film on the first anti-reflection coating layer; performing phosphorus diffusion on the lower surface to form an N+ region and a phosphorus silicon glass (PSG) layer on the N+ region; stripping the PSG layer on the N+ region to expose the N+ region and stripping the sacrifice film on the first anti-reflection coating layer simultaneously; and forming a second anti-reflection coating layer on the N+ region.

Abstract: An electrode structure is disclosed in the present invention and includes a first conductive electrode and a second conductive electrode. The first conductive electrode includes a first busbar electrode member and a first finger electrode member. A portion of the first busbar electrode member above a first diffusion pattern is electrically contacted with the first diffusion pattern by first contact points. A portion of the second busbar electrode above a second diffusion pattern is electrically contacted with the second diffusion pattern by second contact points. The first finger electrode and the second finger electrode are respectively and electrically contacted with the first diffusion pattern and the second diffusion pattern.

Abstract: A back contact solar cell includes a first main busbar electrode, a second main busbar electrode, a plurality of first finger electrodes and a plurality of second finger electrodes, all of which are disposed on a back surface of the back contact solar cell and extending along a first direction. The back contact solar cell further includes a first sub-busbar electrode and a second sub-busbar electrode, which are extending along a second direction. The first finger electrodes are electrically connected to an N-type doped region, and the second finger electrodes are electrically connected to a P-type doped region. The first sub-busbar electrode is electrically connected to the first main busbar electrode and the first finger electrodes. The second sub-busbar electrode is electrically connected to the second main busbar electrode and the second finger electrodes.

Abstract: A method for manufacturing a front electrode of a solar cell and a solar cell device manufactured by the same method are provided. The method includes steps of providing a substrate; performing a first screen printing process to form at least one first electrode over the substrate; and performing a second screen printing process to form at least one row of a second electrode structure over the substrate. The first electrode is formed with a strip body and a plurality of salients connected to the strip body. The second electrode structure has a plurality of sections of finger electrodes, wherein first ends of the finger electrodes directly contact with first surfaces of the salients of the first electrode, respectively, without extending to the strip body.