Covalent functionalization and passivation of exfoliated black phosphorus via aryl diazonium chemistry

Few-layer black phosphorus (BP) is a promising semiconductor, but it is highly reactive and susceptible to ambient degradation. Covalent functionalization with aryl radicals has now been shown to significantly improve the stability of exfoliated BP, as well as the performance of BP-based electronic devices through a controllable p-type doping effect.