As illustrated in FIG. 1, each of the light-emitting elements 5R, 5G, and 5B includes: the first electrode 22; the oxide layer 124a; the oxide layer 124b; any one of the light-emitting layer 24c of the first wavelength range, the light-emitting layer 24c′ of the second wavelength range, or the light-emitting layer 24c″ of the third wavelength range; the electron-transport layer 24d; and the second electrode 25, all of which are stacked one another in the stated order. Note that each of the light-emitting elements 5R, 5G, and 5B can include the features from the first electrode 22 to the second electrode 25 stacked in the reverse order. In such a case, in FIG. 1, the second electrode 25 is disposed in a position of the first electrode 22, and the first electrode 22 is disposed in a position of the second electrode 25. Furthermore, materials of the oxide layers (the HTLs) 124a and the electron-transport layer 24d included in the light-emitting elements 5R, 5G, and 5B will be described later. The oxide layers (the HTLs) and the electron-transport layer 24d of the light-emitting elements 5R, 5G, and 5B do not have to be made of a common material. The layers may be made of different materials. Note that each of the light-emitting elements 5R, 5G, and 5B is a sub-pixel SP of the display device 2.
A bank 23 covering an edge of the first electrode 22 can be made of an applicable photosensitive organic material such as polyimide resin and acrylic resin.
