300 mm Czochralski Growth of Silicon Ingots: Challenges for Solar Application

Growing 300mm silicon mono ingots for solar applications poses several challenges. Due to economic reasons, a magnet is not available at the crystal puller, yet fast crystallization is required without compromising the yield. The process window for growth conditions and control parameters is narrow and requires precise examination. Several 300mm experiments were conducted at the Fraunhofer CSP, and the results will be presented, showcasing the current state of process development. The findings reveal a significant correlation between stable growth conditions, process parameters, shoulder growth, control parameters and the process yield. A scientific and methodological approach can be used to optimize these parameters, which can be further addressed through 3D Multiphysics simulations.