Solar cell

Provided is a solar cell. The solar cell has a cell unit. Additionally, the cell unit comprises a semiconductor substrate, at least two adjacent doping areas, at least one insulation layer, at least two first electrodes, at least one first doping layer and at least one second electrode. The two adjacent doping areas extend to a part of the semiconductor substrate from a first surface. The insulation layer coves the two adjacent doping areas and the first surface of the part of semiconductor substrate. Additionally, the insulation layer is equipped with at least two openings, wherein the totalarea of openings is A and the total area of the semiconductor substrate is B. additionally, 2% is less than or equal to ((A/B)*100%). The ((A/B)*100%) is less than or equal to 9%. The first electrodesare arranged on the insulation layer and contact a part of the two adjacent doping areas through the openings. The first doping layer is arranged on the insulation layer and located between the two adjacent first electrodes.