Graphynes (GYs) are a series of artificial carbon allotropes composed sp- and sp2-hybridized atoms. Although theoretical studies predict many possible GY structures, synthesizing them as real materials is extremely challenging. Among few synthesized GYs, γ-GY has attracted extensive research interest over the past decade because it predicted to possess fascinating properties such direct bandgap...

•A two-dimensional carbon allotrope of holey graphyne (HGY) was designed•1,3,5-tribromo-2,4,6-triethynylbenzene synthesized for fabrication HGY•HGY comprised a pattern six-vertex and highly strained, eight-vertex rings•HGY’s direct p-type semiconductor with high carrier mobility simulated Carbon has many faces, such as graphene, nanotubes, fullerene, graphdiyne, where hexagons are the primary b...