Fast screen printing and curing process for silicon heterojunction solar cells

Within this work, we present industrially feasible and well-applicable methods to effectively lower the costs of silicon heterojunction (SHJ) solar cell processing by reducing cycle time screen printing subsequent thermal curing step using industrial process equipment. For six out nine tested low-temperature silver pastes, velocity in could be doubled compared typical velocity, equaling a reduction 1 sec. Using convection supported infrared radiation (IR) an adapted temperature, dwell SHJ cells can substantially reduced from 10 min 0.5 min, allowing for higher throughput and/or smaller machine dimensioning (footprint). Furthermore, improved conversion efficiency up +0.1 %abs is demonstrated which likely caused so-called light soaking effect. When applying additional with IR at high illumination density, further increase +0.3 achieved. With regard soldered interconnection, combination short hot their diametrical effects on adhesion properties resulted similar peel force values as reference process. Also, treatment laser-based does not exhibit significant effect forces. In summary, our work shows that times metallization strongly while maintaining performance applicability interconnection.