Abstract: A top-emission type organic electroluminescent (EL) element and a top-emission type organic EL device are provided. The top-emission type organic EL element includes a first electrode, an organic functional layer disposed on the first electrode, and a second electrode disposed on a side of the organic functional layer facing away from the first electrode. The second electrode includes a work-function adjustment layer and a transparent metal oxide layer. The work-function adjustment layer is disposed on the side of the organic functional layer facing away from the first electrode, and the transparent metal oxide layer is disposed on a side of the work-function adjustment layer facing away from the organic functional layer. The top-emission type organic EL element and the top-emission type organic EL device can improve the luminous efficiency and prolong the service life.

Abstract: The present disclosure discloses a display device, including a display panel, a back panel, and a shading adhesive tape. A bonding region is provided on at least one side of the display panel. The back panel includes bottom panel and a lateral panel surrounding the bottom panel. The lateral panel and the bottom panel form a cavity. The display panel is located in the cavity. A part of the lateral panel away from the bottom panel is disposed adjacent to a perimeter of the display panel. The shading adhesive tape is adjacent to a side of the lateral panel close to the cavity. At least a part of the shading adhesive tape is adhered to a side of the display panel away from the bottom panel and is disposed corresponding to the bonding region.

Abstract: A top-emission type organic electroluminescent (EL) element and a top-emission type organic EL device are provided. The top-emission type organic EL element includes a first electrode, an organic functional layer disposed on the first electrode, and a second electrode disposed on a side of the organic functional layer facing away from the first electrode. The second electrode includes a work-function adjustment layer and a transparent metal oxide layer. The work-function adjustment layer is disposed on the side of the organic functional layer facing away from the first electrode, and the transparent metal oxide layer is disposed on a side of the work-function adjustment layer facing away from the organic functional layer. The top-emission type organic EL element and the top-emission type organic EL device can improve the luminous efficiency and prolong the service life.

Abstract: An OLED device structure, an OLED display panel and a display device are provided. The OLED device structure includes: a first electrode; a self-assembled layer, disposed on the first electrode; a first transportation layer, disposed on the self-assembled layer; a light-emitting layer, disposed on the first transportation layer; a second transportation layer, disposed on the light-emitting layer; and a second electrode, disposed on the second transportation layer. The OLED display panel and the display device each include the OLED device structure. By setting a self-oriented self-assembled layer in the OLED device structure and selecting specific materials, advantages can be achieved as follows: an injection efficiency of hole is improved, a driving voltage is reduced, mobilities of electron and hole are increased, a luminous efficiency is increased, an external light coupling efficiency is increased, a light extraction rate is increased, and an external quantum efficiency is improved.