ALUMINIUM PASTE DEDICATED FOR LOCAL ALUMINIUM BACK SURFACE FIELD CRYSTALLINE SILICON SOLAR CELL AND PREPARATION METHOD THEREFOR

摘要

Provided is an aluminium paste dedicated for a local aluminium back surface field crystalline silicon solar cell. The paste is prepared from raw materials matched with the following parts by mass: 70-78 parts of aluminium powder, 0.05-3 parts of inorganic bond, 17-27 parts of organic bond and 1-5 parts of additive. Further provided is a preparation method for the aluminium paste dedicated for a local aluminium back surface field crystalline silicon solar cell. Therefore, compared with the traditional aluminium paste, the aluminium paste is specially applied to a local aluminium back surface field crystalline silicon solar cell, and has the advantages of good flowability, minimal damage to a passive film, good contact with a window, a compact and uniform aluminium film, etc. The average conversion efficiency of volume production for the crystalline silicon solar cell is ≥ 20.0%. After a cell slice is laminated and packaged, and an EVA tear test is performed thereon, the adhering pulling force of the aluminium back surface field is measured as ≥ 10 N.