  2D materials with high charge carrier mobility and tunable electronic band
gaps have attracted intense research effort for their potential use as active
components in nanoelectronics. 2D-conjugated polymers (2DCP) constitute a
promising sub-class due to the fact that the electronic band structure can be
manipulated by varying the molecular building blocks, while at the same time
preserving the key features of 2D materials such as Dirac cones and high charge
mobility. The major challenge for their use in technological applications is to
fabricate mesoscale ordered 2DCP networks since current synthetic routes yield
only small domains with a high density of defects. Here we demonstrate the
synthesis of a mesoscale ordered 2DCP with semiconducting properties and Dirac
cone structures via Ullmann coupling on Au(111). This material has been
obtained by combining rigid azatriangulene precursors and a hot dosing approach
which favours molecular diffusion and reduces the formation of voids in the
network. These results open opportunities for the synthesis of 2DCP Dirac cone
materials and their integration into devices.
