In this chapter, we give a review on the recent advances in the study of thermal properties of monolayer and few-layer phosphorene. We first discuss some of the interesting features in the thermal conduction of monolayer and multilayer phosphorene and their underlying mechanisms. Next, we present recent understandings in developing phosphorene phononic crystal. Finally, we examine recent experimental works on the thermal conductivity of few-layer phosphorene.

Due to its unusual structural and electronic properties, phosphorene holds great promise for its applications in nanoelectronic and optoelectronic devices. However, effective thermal management of strong localized Joule heating (or hot spots) in those nanoscale devices remains challenging. Hence, use of highly thermally conducting materials in or around hot spots is of great important for dissipating heat and preventing device performance from degradation and breakdown. Recent studies have presented several interesting findings about the thermal properties of phosphorene. Thus, it would be of great value to critically review these findings and 132 evaluate the possibility of integrating this interesting material into nanoscale electronic devices. In this chapter, we would like to review the thermal conduction of monolayer and multilayer phosphorene, focusing on some of the most important characteristics, including anisotropic thermal conduction in monolayer phosphorene, thermal conduction in multilayer phosphorene, phosphorene phononic crystal, and recent experimental progresses.