A photovoltaic device comprising: an organic semiconductor including a photoactive region for generating excitons, the organic semiconductor being formed by an organic material; and an inorganic semiconductor disposed within the organic semiconductor, the inorganic semiconductor having piezoelectricity and including a dissociation region (21, 22) for dissociating carriers included in the excitons; a first electrode and a second electrode (30, 40) disposed on opposite sides of the organic semiconductor; wherein a relationship of energy levels between the photoactive region and the dissociation region satisfies at least one of the following equations or, wherein the dissociation region has a plurality of layers (21c, 21d) formed of mutually different materials and is a region in which strain is generated due to a difference in the lattice constants of the different materials, characterized in that the dissociation region (21, 22) includes a first dissociation region (21, 22) through which only holes from among the carriers can pass, and a second dissociation region (21, 22) through which only electrons from among the carriers can pass, wherein the first dissociation region (21, 22) and the second dissociation region (21, 22) are formed in a columnar shape in the organic semiconductor, wherein the first dissociation region (21, 22) and the second dissociation region (21, 22) are surrounded by the organic material that forms the organic semiconductor, a part of the first dissociation region (21, 22) is directly connected to the first electrode (30, 40), and a part of the second dissociation region (21, 22) is directly connected to the second electrode (30, 40); E LUMO > E C E HOMO < E V where E LUMO represents a LUMO energy level in the photoactive region, E HOMO represents a HOMO energy level in the photoactive region, Ec represents the energy level at a lower end of a conduction band in one layer of the dissociation region, and Ev represents the energy level of an upper end of a valence band in the one layer of the dissociation region. an organic semiconductor including a photoactive region for generating excitons, the organic semiconductor being formed by an organic material; and an inorganic semiconductor disposed within the organic semiconductor, the inorganic semiconductor having piezoelectricity and including a dissociation region (21, 22) for dissociating carriers included in the excitons; a first electrode and a second electrode (30, 40) disposed on opposite sides of the organic semiconductor; wherein a relationship of energy levels between the photoactive region and the dissociation region satisfies at least one of the following equations or, wherein the dissociation region has a plurality of layers (21c, 21d) formed of mutually different materials and is a region in which strain is generated due to a difference in the lattice constants of the different materials, characterized in that the dissociation region (21, 22) includes a first dissociation region (21, 22) through which only holes from among the carriers can pass, and a second dissociation region (21, 22) through which only electrons from among the carriers can pass, wherein the first dissociation region (21, 22) and the second dissociation region (21, 22) are formed in a columnar shape in the organic semiconductor, wherein the first dissociation region (21, 22) and the second dissociation region (21, 22) are surrounded by the organic material that forms the organic semiconductor, a part of the first dissociation region (21, 22) is directly connected to the first electrode (30, 40), and a part of the second dissociation region (21, 22) is directly connected to the second electrode (30, 40); E LUMO > E C E HOMO < E V where E LUMO represents a LUMO energy level in the photoactive region, E HOMO represents a HOMO energy level in the photoactive region, Ec represents the energy level at a lower end of a conduction band in one layer of the dissociation region, and Ev represents the energy level of an upper end of a valence band in the one layer of the dissociation region. E LUMO represents a LUMO energy level in the photoactive region, E HOMO represents a HOMO energy level in the photoactive region, Ec represents the energy level at a lower end of a conduction band in one layer of the dissociation region, and Ev represents the energy level of an upper end of a valence band in the one layer of the dissociation region.