| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide aluminum paste for a solar cell capable of suppressing warpage of a back electrode while keeping an electrical characteristic, film strength and film appearance. <P>SOLUTION: Since a small amount of Sn powder is included in this aluminum paste, when an overall electrode 26 is formed on the back of a silicon substrate 12 by printing, drying and baking by using the paste, warpage of the silicon substrate 12 is reduced. In addition, when Sn is added, waterproofness of the overall electrode 26 formed of aluminum is improved and, since the additive amount is 0.3-5.0 (pts.mass) in 100 (pts.mass) of Al, that is, an extremely small amount such as 0.21-3.5 (pts.mass) in 100 (pts.mass) of paste, the conductivity, film strength and appearance of the overall electrode 26 are not influenced at all. Since the warpage can be suppressed without reducing the film thickness, a BSF effect can be sufficiently exerted. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
