The invention relates to an individual photon source comprising at least one active solid body which, when excited by means of light, the photons of which each have a excitation energy, emits a single photon having a lower emission energy within a predefined time interval. According to the invention, the active solid body is arranged on a surface or interface of an electrically operated light source for photons having the excitation energy, such that said body can be excited through this surface or interface. It has been recognized that, in this way, the ability to miniaturize and readily handle electrical primary light sources can be advantageously combined with the capability of the active solid body to emit precisely one photon. Because the active solid body emits only a single photon within a predefined time interval, it is no longer a disadvantage if the light source used for the excitation emits many photons per unit time. This opens up a way to produce individual photon sources in large quantities, inter-alia by the method according to the invention.