Polycrystalline laser-crystallized silicon thin-film solar cells deposited on glass substrates

摘要

The invention relates to a multicrystalline laser-crystallized silicon thin layer solar cell deposited on a glass substrate (a), which is configured for illuminating from the substrate side, and to a production method for the cell. Said solar cell comprises a laser-crystallized multicrystalline silicon layer (b 1 , b 2 ), whose lower layer region (b 1 ), which is situated on the substrate (a) and provided as a nucleation layer and, at the same time, as a lower transparent electrode, is p-doped (alternatively, n-doped). The silicon layer's second layer region (b 2 ), which faces away from the substrate is p-doped (alternatively, n-doped) less than the nucleation layer and serves as an absorber layer. The edge lengths of the crystallites in the multicrystalline layer (b 1 , b 2 ) are longer than the layer is thick. The inventive solar cell also comprises a laser-crystallized, n-doped (alternatively, p-doped) silicon layer (c), which is located on the silicon layer (b 1 , b 2 ) and which serves as an emitter layer, and comprises a back-reflecting contact layer (A 1 ) that serves as an upper electrode on the emitter layer (c).