CN2283311Y - Organic thin-film electroluminescent device - Google Patents

Abstract

The utility model relates to an organic thin-film electroluminescent device. People generally make organic thin-film electroluminescent device with various structures by some film forming method, wherein, positive hole conveying layers and electron conveying layers can be formed by layers of different organic materials, and a luminescent layer is formed by the mixture of one kind or multiple kinds of materials. The thickness of an organic layer is about scores to hundreds of nautical miles, and a metallic electrode generally adopts the alloy of A1 or Mg, AG, etc. The utility model adopts four cetyl pyridinium (dibenzoyl methane) europium (III) as the luminescent layer of the organic thin-film electroluminescent device, the electroluminescent spectrum is consistent with the fluorescence spectrum, both the electroluminescent spectrum and the fluorescence spectrum are positioned at a spectral line with excellent color purity in the red spectral region, the half height of the spectral line is about 5 nm. The utility model has the advantages of uniform luminescence by luminous surfaces, and high performance.

Description

Electroluminescent device of organic thin film

The design belongs to a kind of electroluminescent device.

Since Kodak delivered the multilayer electroluminescent device of organic thin film of high brightness in 1987, because the raising and the maturation of process, organic electroluminescence device had approached commercial the application.

People generally become membrane means to make the electroluminescent device of organic thin film of various structures by certain.Wherein hole transporting layer and electron supplying layer can be made of multilayer different organic materials film, and luminescent layer can be that one or more material mixing constitute.Organic layer thickness about tens is to hundreds of nm, and metal electrode generally adopts Al or Mg, Ag alloy etc.Up till now, the maximum brightness of electroluminescent device of organic thin film can reach cd/m up to ten thousand ²But it is relatively poor that weak point is a monochromaticjty.

The design's purpose provides a kind of monochromaticjty electroluminescent device of organic thin film preferably.

To achieve these goals, the design adopts four (dibenzoyl methane) europiums of Ceepryn (III) (being called for short HDBM) to make the luminescent layer of electroluminescent device of organic thin film.

The design is in selected device architecture, and its electroluminescent spectrum is consistent with its fluorescence spectrum, all is in the fabulous spectral line of colorimetric purity of the highly about 5nm of one and half in the red spectral region.The device light-emitting area is luminous everywhere evenly, and is functional.

Provide embodiment below in conjunction with accompanying drawing.

Fig. 1 is the design's a schematic diagram.

(1) hole transporting layer among the figure; (2) luminescent layer; (3) negative electrode; (4) ITO electrode; (5) glass.

Adopt the vacuum evaporation film technique, each layer is at 3*10 ^-3Evaporation system film is gone up making ITO electrode (4) at glass (5) under the Pa vacuum, and TPB makes hole transporting layer (1), and thickness is 50nm, and HDBM makes luminescent layer (2), and thickness is 150nm; Mg, Ag alloy are negative electrode (3), and thickness is respectively Mg35nm, Ag95nm.

Claims (1)

1, a kind of electroluminescent device of organic thin film is made up of hole transporting layer, luminescent layer, negative electrode, ITO electrode etc., it is characterized in that doing with four (dibenzoyl methane) europiums of Ceepryn (III) luminescent layer of electroluminescent device of organic thin film.