Tandem organic light emitting diode device and display device

Abstract

The invention discloses a laminated organic light-emitting diode device and a display device, which relate to the field of display technology, and realize weak attenuation of luminous intensity when the viewing angle becomes larger. The stacked organic light-emitting diode device includes: a reflective electrode and a transmissive electrode; n organic light-emitting layers are sequentially arranged between the reflective electrode and the transmissive electrode, and n is a positive integer greater than or equal to 2; every two adjacent organic light-emitting layers A connection unit is arranged between them, and the connection unit is used to connect two adjacent organic light-emitting layers; the distance between two adjacent organic light-emitting layers is h, and the organic light-emitting layer on the side close to the reflective electrode is the first Organic light-emitting layer, wherein λ1 is the wavelength of the maximum energy in the spectral energy distribution line of the light emitted by the first organic light-emitting layer, and the organic light-emitting layer on the side close to the transmissive electrode is the second organic light-emitting layer, where λ2 is the second organic light-emitting layer The wavelength of the maximum energy in the spectral energy distribution line of the light emitted by the layer, λ2>λ1.

Description

technical field [0001] The present invention relates to the field of display technology, in particular to a stacked organic light-emitting diode (Tandem Organic Light-Emitting Diode, Tandem OLED) device and a display device. Background technique [0002] Organic light-emitting diodes have the advantages of simple preparation process, low cost, arbitrarily adjustable luminescent color in the visible light region, easy large-area and flexible bending, and are the most promising technology in the display field. A conventional organic light emitting diode device includes a first electrode, a second electrode and an organic light emitting layer disposed between the first electrode and the second electrode, one of the first electrode and the second electrode is an anode, and the other electrode is a cathode. Auxiliary functional layers such as a hole injection layer and a hole transport layer are usually included between the anode and the organic light emitting layer, and auxiliar...

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Problems solved by technology

[0004] However, the light field distribution of traditional OLED devices has strong directivity, that is, when the viewing angle becomes larger, the attenuation of luminous intensity is more serious

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