SOLAR CELL HAVING POROUS STRUCTURE AND METHOD FOR FABRICATION THEREOF

摘要

A solar cell comprises a silicon substrate having a first impurity region, and a semiconductor layer having a second impurity region, which has a porous structure consisting of a plurality of holes and is doped with a second impurity different from a first impurity used to form the first impurity region. Especially, the solar cell also includes another semiconductor layer doped with another first impurity having a high concentration, which is interposed between the silicon substrate having the first impurity region and the semiconductor layer having the second impurity region, as well as a passivation layer or an anti-reflective layer formed on an upper surface of the porous structure so as to passivate the silicon substrate.