NOVELTY - The bifacial solar cell (110) comprises an n-type semiconductor layer, first metal conductivity lines coupled to a first side of the n-type semiconductor layer, a p-type crystalline silicon layer coupled to a second side of the n-type semiconductor layer, a barrier layer coupled to the p-type crystalline silicon layer and located opposite to the n-type semiconductor layer, a transparent conductive layer coupled to the barrier layer and located opposite to the p-type crystalline silicon layer, and second metal conductivity lines coupled to the transparent conductive layer.    USE - The bifacial solar cell is useful in a photovoltaic system (claimed), where the solar cell is a bifacial crystalline solar cell.    ADVANTAGE - The bifacial solar cell has improved efficiency.    DETAILED DESCRIPTION - The bifacial solar cell (110) comprises an n-type semiconductor layer, first metal conductivity lines coupled to a first side of the n-type semiconductor layer, a p-type crystalline silicon layer coupled to a second side of the n-type semiconductor layer, a barrier layer coupled to the p-type crystalline silicon layer and located opposite to the n-type semiconductor layer, a transparent conductive layer coupled to the barrier layer and located opposite to the p-type crystalline silicon layer, second metal conductivity lines coupled to the transparent conductive layer and located opposite to the barrier layer, and a passivation layer coupled to the first side of the n-type semiconductor layer and disposed between the first metal conductivity lines. The first metal conductivity lines are in electrical communication with the n-type semiconductor layer. The second metal conductivity lines are in electrical communication with the transparent conductive layer. The barrier layer has a thickness of less than 6 nm. An INDEPENDENT CLAIM is included for a photovoltaic system.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a photovoltaic system.    Bifacial solar cells (110)    Adjacent rows (112, 114)    Reflector (120)    Reflective surface (130)    Third long axis. (132)