In this animation, the next gen. of optoelectronic devices based upon the physics and tech. of layered 2D materials is presented. Following the discovery of graphene a host of other 2D materials have been discovered with a wide range of different properties. We explain the concept and unique properties of 2-dimensional materials and show that by stacking different 2D materials into carefully constructed stacks, these properties can be combined to produce artificial materials known as van der Waals heterostructures with tailor-made properties. Such systems are at the forefront of semiconductor research of which our research group in Sheffield is actively contributing.