Herein, challenges in the fabrication of full dopant-free bifacial silicon solar cells are discussed and efficient devices utilizing a MoO3/ indium tin oxide (ITO)/Ag hole-selective contact ZnO/LiFx/Al electron-selective contacts with up to 79% short-circuit current bifaciality demonstrated. The rear electron features full-area ZnO antireflective coating LiFx/Al finger contact, allowing sunligh...