Prompt: Generate an illustration showing a semiconductor material (such as titanium dioxide) represented as a lattice structure. Show incoming photons (particles of light) striking the surface of the semiconductor. Illustrate the absorption of a photon by an electron within the material, causing the electron to move to a higher energy level and become a 'free' electron. Additionally, depict the creation of a 'hole' (a positively charged vacancy) in the place where the electron previously existed within the lattice structure. Highlight the separation of the electron and the hole as distinct entities within the semiconductor material.