•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...