There is presented a solar cell comprising a semiconductor substrate of one conductivity-type, a layer of the opposite conductivity-type provided on a surface side of the semiconductor substrate, a surface electrode formed thereon, and a backside electrode formed on a backside of the semiconductor substrate,...http://www.google.com/patents/US20030178057?utm_source=gb-gplus-sharePatent US20030178057 - Solar cell, manufacturing method thereof and electrode material
