A
solar cell and a method for producing a
solar cell are described, comprising at least one photovoltaic layer region (1) which at least partially absorbs photons (6) incident therein, whose
photon energy is greater than a minimum
photon energy Emin, and releases electrical charge carriers in the form of
electron-hole pairs, which are spatially separable within the photovoltaic layer region (1) and can be tapped via at least two electrodes (2), which are electrically connected to the photovoltaic layer region (1), to implement an electrical
voltage, and comprising at least one
interaction layer (3 and / or 4), which at least partially overlaps the photovoltaic layer region, in which at least a part of the incident photons (6) are subject to an interaction with emission of photons of higher or lower
photon energy than that of the incident photons. The invention is distinguished in that the at least one
interaction layer (3 and / or 4) has a matrix structure, in which locally delimited areas having
optically active material, which has the structure and size of crystalline nanoparticles, are provided and interact with the incident photons (6).