ABSTRACT
2D black phosphorus, 2D material, and phosphorene form a layered structure with single element, phosphorus, just like graphene. Due to its distinct properties compared with other 2D materials, 2D black phosphorus (BP) is extensively studied with the purpose to estimate its prospects for various applications, including humidity sensors. In this chapter, we consider features of BP and phosphorene synthesis and fabrication of BP-based humidity sensors. Detailed characterization of humidity-sensor parameters is also presented in this chapter. It is shown that BP has unique humidity-sensitive properties. But at the same time, BP has a number of disadvantages, which significantly limit its use in real devices. The tunability of BP properties and the instability of BP are the main disadvantages of 2D BP. There are several approaches to improve stability of BP. However, these approaches cannot resolve this problem.
