Application of the Inkjet-Honeycomb-Texture in Silicon Solar Cell Production

In this work a honeycomb texture (HC-texture), which is created by isotropic wet chemical under-etching of an inkjetted mask, was successfully applied to Floatzone silicon (FZ-Si) wafers with a diameter of 150mm. A nearly perfect HC-texture with 18.2% reflection after texturization was obtained despite printing irregularities in the masking step. Lifetime measurements after emitter diffusion and anti-reflection coating show that the HC-texture is also better passivated than of the 25.8% reflecting acidic texture that was used in the reference group. An overall efficiency gain of 0.6% might be deduced when using a HC-texture instead of the acidic texture.