| abstract |
The invention relates to a method for producing a solar cell and to a solar cell which can be produced accordingly. On a solar cell substrate, first a ridged texture, which may for example comprise pyramids produced by alkaline etching, is formed both on a front face and on a rear face of the solar cell substrate. Then an etching barrier layer is applied to the front face of the solar cell substrate. Next the texture on the rear face of, the solar cell substrate is smoothed by etching in an isotropically acting etching solution which for example contains acid, wherein the front face is protected by the etching barrier layer. Thus, ridged structures on the rear face can be avoided and in this way reflection can be increased and surface passivation can be improved, both of which can lead to an increased potential efficiency. At the same time an emitter layer formed over the entire surface of the solar cell substrate on the rear face can be removed during etching, so that electrical isolation of the front face contacts and the rear face contacts may be superfluous. |