The stencil printing for front contact formation on the silicon solar cells

This study reports the stencil printing process of a front contact electrode on monocrystalline (Cz-Si), textured silicon solar cells. The final parameters of the cells obtained by applying the squeegee blades with different hardness and detected by SEM, Corescanner, LBIC and I-V systems are analysed. By using stencil technique, the front side metallization has been reduced by 7.5%, resulting in the limiting of shading losses and improvement of the Si solar cell output parameters. The stencil printing of 100 µm fingers width with aspect ratio of 0.50 resulted in short circuit current density of 34.7 mA/cm², open circuit voltage of 606 mV, fill factor of 0.768 and cell conversion efficiency of 16.16% compared to 15.33% with screen printed contacts.