Stabilized photoactive composition comprising: - at least one photoactive organic polymer; - at least one light stabilizer selected from hindered amines; - at least one UV absorber selected from triazines, benzoxazinones, benzotriazoles, benzophenones, benzoates, formamidines, cinnamates or propenoates, aromatic propanediones, benzoimidazoles, cycloaliphatic ketones, formanilides including oxamides, cyanoacrylates, benzopyranones, salicylates, or mixtures thereof. Said photoactive composition can be advantageously used in the construction of photovoltaic devices such as, for example, photovoltaic cells, photovoltaic modules, solar cells, solar modules, on both rigid and flexible supports.