NOVELTY - The solar cell (101) has a semiconductive layer that is formed adjacent to surface of primary semiconductive substrate (10). The secondary semiconductive layer is formed opposite to primary conductivity type. A front surface electrode (90) is formed on secondary semiconductive layer. The passivation layer (50) is formed on secondary surface of primary semiconductive substrate and is provided with corresponding opening. A back surface electrode (60) is formed to contact secondary surface of primary semiconductive substrate through opening.    USE - Solar cell e.g. PV style solar cell.    ADVANTAGE - The back surface electric field (BSF) layer portion can be formed at region communicating with the opening in the passivation layer when the back surface electrode is bound to the front structure. The BSF layer portion can be operated to reduce the speed of extinction due to recombination of electrons and holes. The solar cell can be provided with hetero-junction structure at front surface portion such that free electron hole pairs can be generated and output voltage can be obtained. The damage to the silicon surface can be avoided. The charge loss due to electron-hole recombination can be reduced through the passivation layer formed in the semiconductor substrate back surface such that the leakage current can be reduced. The passivation layer can be formed in the back surface functions as reflection layer such that the inner light absorption can be improved. The front surface of the semiconductor substrate can be provided with hetero-junction structure and the back surface of the semiconductor substrate can be provided with passivation layer such that the efficiency of the solar cell can be improved. The first semiconductive substrate can be such that the absorption ratio can be increased and the reflectance can be reduced, the efficiency of the solar cell can be improved.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method for manufacturing solar cell.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross sectional view of the solar cell.    Semiconductive substrate (10)    Semiconductive layer (40)    Passivation layer (50)    Electrodes (60,90)    Solar cell (101)