A display is provided with: a substrate; a plurality of parallel scan wires extending over the substrate in a first direction; a plurality of parallel data wires extending parallel to a surface of the substrate in a second direction perpendicular to the first direction; at least one switching element per intersection between the scan wires and the data wires; pixel electrodes connected to the switching elements; at least one phosphor layer provided above the pixel electrodes; and common electrodes provided above the phosphor layer, and the phosphor layer has a polycrystalline structure made of a first semiconductor material and a second semiconductor material segregated between grain boundaries in the polycrystalline structure, which is different from the first semiconductor material.