Molecularly Engineered Black Phosphorus Heterostructures with Improved Ambient Stability and Enhanced Charge Carrier Mobility

Overcoming the intrinsic instability and preserving unique electronic properties are key challenges for practical applications of black phosphorus (BP) under ambient conditions. Here, it is demonstrated that molecular heterostructures BP hexaazatriphenylene derivatives (BP/HATs) enable improved environmental stability charge transport properties. The strong interfacial coupling transfer between HATs lattice decrease surface electron density protect sheets from oxidation, resulting in an excellent lifetime up to 21 d. Importantly, increase scattering time BP, contributing carrier mobility 97 cm2 V-1 s-1, almost three times pristine films, based on noninvasive THz spectroscopic studies. film order magnitude larger than previously reported values exfoliated 2D materials. strategy opens new avenues versatile provides effective method tuning physicochemical other air-sensitive semiconductors.