PROCESS FOR THE PRODUCTION OF A MWT SILICON SOLAR CELL
    66.
    发明公开
    PROCESS FOR THE PRODUCTION OF A MWT SILICON SOLAR CELL 审中-公开
    一种用于生产MWT硅太阳能电池

    公开(公告)号:EP2534695A2

    公开(公告)日:2012-12-19

    申请号:EP11705093.0

    申请日:2011-02-08

    IPC分类号: H01L31/0224

    摘要: A process for the production of a MWT silicon solar cell comprising the steps: (1) providing an n-type silicon wafer with (i) holes forming vias between the front-side and the back-side of the wafer and (ii) a p-type emitter extending over the entire front-side and the inside of the holes, (2) applying a conductive metal paste to the holes of the silicon wafer to provide at least the inside of the holes with a metallization, (3) drying the applied conductive metal paste, and (4) firing the dried conductive metal paste, whereby the wafer reaches a peak temperature of 700 to 900C, wherein the conductive metal paste has no or only poor fire-through capability and comprises (a) at least one particulate electrically conductive metal selected from the group consisting of silver, copper and nickel, (b) at least one particulate p-type dopant, and (c) an organic vehicle.