Abstract: An organic light-emitting device includes a first electrode layer, an emission layer, an electron transporting layer, an electron injection layer, and a second electrode layer sequentially formed from bottom to top. The emission layer includes a guest light-emitting material, a first phenyl phosphine oxide derivative and a hole transporting material. The electron transporting layer includes a second phenyl phosphine oxide derivative and a third phenyl phosphine oxide derivative different from the second phenyl phosphine oxide derivative. One of the second phenyl phosphine oxide derivative and the third phenyl phosphine oxide derivative is identical to the first phenyl phosphine oxide derivative. The electron injection layer includes an alkaline metal compound.

Abstract: A light-emitting device includes a substrate, an active device layer, a bank structure and organic light-emitting materials. The active device layer is located on the substrate. The bank structure is located on the active device layer. The bank structure includes at least one first bank and a plurality of second banks. The at least one first bank has arc surfaces and includes hydrophilic materials. The second banks extend along the first direction, and the second banks include a hydrophobic material. The bank structure has a plurality of openings. Two sides of each opening are defined by two corresponding arc surfaces of the at least one first bank, and the other two sides of each opening are defined by two opposite side walls of the corresponding two second banks. The organic light-emitting materials are filled into the openings of the bank structure.

Abstract: An organic light-emitting device includes a first electrode layer, an emission layer, an electron transporting layer, an electron injection layer, and a second electrode layer sequentially formed from bottom to top. The emission layer includes a guest light-emitting material, a first phenyl phosphine oxide derivative and a hole transporting material. The electron transporting layer includes a second phenyl phosphine oxide derivative and a third phenyl phosphine oxide derivative different from the second phenyl phosphine oxide derivative. One of the second phenyl phosphine oxide derivative and the third phenyl phosphine oxide derivative is identical to the first phenyl phosphine oxide derivative. The electron injection layer includes an alkaline metal compound.