Wöhrle, NicoNicoWöhrleKimmerle, AchimAchimKimmerleGreulich, Johannes M.Johannes M.GreulichWolf, AndreasAndreasWolf2022-03-052022-03-052016https://publica.fraunhofer.de/handle/publica/24423210.1109/JPHOTOV.2016.2540248This work introduces a novel industrial feasible back-contact back-junction crystalline silicon solar cell technology with exclusively highly doped surfaces. The near-surface phosphorus doping is realized in one single tube furnace diffusion step, while the alloying of screen-printed aluminum forms the p(+)-doping. A first experimental verification leads to a conversion efficiency of 20.1%. Further possible improvements are proposed and verified with numerical simulation. We perform comprehensive step-by-step optimization led by insights from free energy loss analysis, resulting in a conversion efficiency potential of 22.4% under realistic assumptions for design optimization.enPV Produktionstechnologie und QualitätssicherungSilicium-PhotovoltaikPilotherstellung von industrienahen SolarzellenMesstechnik und Produktionskontrollesolar celln-typeback-junctionsimulationsentaurusjournal article