Abstract: An organic light-emitting device includes an anode electrode and a cathode electrode that are arranged facing each other; a light-emitting layer arranged between the anode electrode and the cathode electrode; and a hole transport layer arranged between the anode electrode and the light-emitting layer, and including one or more layers. A layer, of the one or more layers of the hole transport layer, contacting the light-emitting layer has a HOMO energy level 12bH that is higher than a HOMO energy level 13H of the light-emitting layer. A difference ?E1 between the HOMO energy level 12bH of the layer contacting the light-emitting layer of the hole transport layer and the HOMO energy level 13H of the light-emitting layer is 0.32 eV or less.

Abstract: Each of sub-pixels includes an upper electrode layer, a lower electrode layer between the upper electrode layer and the substrate, an organic light-emitting layer between the lower electrode layer and the upper electrode layer, and an interlayer between the organic light-emitting layer and the lower electrode layer. The pixel defining layer is provided between the lower electrode layer and the interlayer. The convex structural part is provided between the substrate and the interlayer. The convex structural part has a third side wall on the side of the first sub-pixel and a fourth side wall on the side of the second sub-pixel. The first side wall, the second side wall, the third side wall, and the fourth side wall have forward tapered surfaces.

Abstract: Each of sub-pixels includes an upper electrode layer, a lower electrode layer between the upper electrode layer and the substrate, an organic light-emitting layer between the lower electrode layer and the upper electrode layer, and an interlayer between the organic light-emitting layer and the lower electrode layer. The pixel defining layer is provided between the lower electrode layer and the interlayer. The convex structural part is provided between the substrate and the interlayer. The convex structural part has a third side wall on the side of the first sub-pixel and a fourth side wall on the side of the second sub-pixel. The first side wall, the second side wall, the third side wall, and the fourth side wall have forward tapered surfaces.