Crystalline silicon solar cell and a manufacturing method thereof local aluminum back surface field is double-sided light-transmissive

摘要

The present invention is a crystalline silicon solar cell having a local aluminum back surface field is double-sided light-transmissive, silicon substrate and, disposed emitter on the front surface of the silicon substrate, the surface passivation of the reflection reduction the membrane and the front surface electrode, the back surface in the installed back surface passivation film of the silicon substrate, comprising a back surface field and the back electrode, the back surface field is localized aluminum back surface field, the back surface field back surface passivation film Anamata the groove is opened to the top, to cover the area to open the hole or groove by using a linear aluminum paste in a region where a hole or groove, pending local back passivation film without coated with aluminum paste, firing by forming the local aluminum back surface field in the area to open a hole or groove after, it said it and the local aluminum back surface field and the back electrode are communicated. Not covered backside passivation layer of the solar cell (film) by completely aluminum paste, the battery can absorb light in the incident or scattered from the backside, by increasing the current of the battery or module, battery and module to improve the photoelectric conversion efficiency. Also disclosed a method for producing a crystalline silicon solar cell having a local aluminum back surface field is the double-sided translucent.FIELD 1