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Transparent organic light-emitting device and method for manufacturing same

A luminescence and electromechanical technology, applied in the direction of electrical solid devices, semiconductor/solid device manufacturing, electrical components, etc., can solve the problems of low light transmittance, easy cracks, thick transparent devices, etc., and achieve good compactness and uniformity , low deposition temperature and strong adhesion

Inactive Publication Date: 2015-05-20
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the desiccant in the transparent device absorbs a large amount of oxygen and water vapor, the desiccant loses its absorption capacity in a short period of time, resulting in the gradual accumulation of oxygen and water vapor in the transparent device, so that the life of the transparent device is significantly reduced, and the long life cannot be achieved. Encapsulation requirements for transparent organic electroluminescent devices
The light transmittance of the commonly used glass cover or metal cover is low, which will reduce the light extraction efficiency of transparent devices and affect the visual effect of transparent devices in practical applications
At the same time, the commonly used glass cover or metal cover are brittle materials, which are prone to cracks, and the transparent device will appear very thick, which is not suitable for flexible transparent devices.

Method used

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  • Transparent organic light-emitting device and method for manufacturing same
  • Transparent organic light-emitting device and method for manufacturing same
  • Transparent organic light-emitting device and method for manufacturing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] figure 1 It is the schematic diagram of the transparent organic electroluminescent device in embodiment 1; figure 1 As shown, the transparent organic electroluminescence device in Example 1 includes an ITO glass substrate (10), an organic light-emitting functional layer (20), a transparent cathode (30) and an encapsulation layer (40) stacked in sequence from bottom to top; The electroluminescent functional layer (20) includes a hole injection layer (21), a hole transport layer (22), a light emitting layer (23), an electron transport layer (24) and an electron injection layer (25) stacked in sequence from bottom to top . figure 2 yes figure 1 Schematic diagram of the structure of the encapsulation layer; such as figure 2As shown, the encapsulation layer (40) includes a mixed barrier layer (41), a first silicon oxynitride film layer (42), an inorganic barrier layer (43) and a second oxygen Silicon nitride film layer (44).

[0058] A method for preparing a transpare...

Embodiment 2

[0075] A method for preparing a transparent organic electroluminescent device, comprising the steps of:

[0076] (1), (2), (3) are the same as embodiment 1;

[0077] (4) Preparation of encapsulation layer:

[0078] a) Preparation of mixed barrier layer: The mixed barrier layer was prepared on the surface of the transparent cathode by vacuum evaporation method, and the vacuum degree was 5×10 -5 Pa, the evaporation rate is The mixed barrier layer materials include N,N'-diphenyl-N,N'-di(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (NPB) and doped in Vanadium oxide (V 2 o 5 ) and aluminum (Al); vanadium oxide (V 2 o 5 ) is 40% by mole fraction, and aluminum (Al) is 30% by mole fraction; the thickness of the mixed barrier layer is 300nm;

[0079] b) Preparation of the first silicon oxynitride film layer: the first silicon oxynitride film layer was prepared on the surface of the mixed barrier layer by plasma enhanced chemical vapor deposition, the working pressure was 10Pa, the de...

Embodiment 3

[0084] A method for preparing a transparent organic electroluminescent device, comprising the steps of:

[0085] (1), (2), (3) are the same as embodiment 1;

[0086] (4) Preparation of encapsulation layer:

[0087] a) Preparation of mixed barrier layer: The mixed barrier layer was prepared on the surface of the transparent cathode by vacuum evaporation method, and the vacuum degree was 5×10 -5 Pa, the evaporation rate is Hybrid barrier materials include 8-hydroxyquinoline aluminum (Alq 3 ) and doped in 8-hydroxyquinoline aluminum (Alq 3 ) in tungsten oxide (WO 3 ) and nickel (Ni); tungsten oxide (WO 3 ) is 30% by mole fraction, nickel (Ni) is 10% by mole fraction; the thickness of the mixed barrier layer is 200nm;

[0088] b) Preparation of the first silicon oxynitride film layer: the first silicon oxynitride film layer was prepared on the surface of the mixed barrier layer by plasma enhanced chemical vapor deposition, the working pressure was 50Pa, the deposition tempe...

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Abstract

The invention discloses a transparent organic light-emitting device which comprises a packaging layer. The packaging layer comprises a mixed barrier layer, a first silicon oxynitride film layer, an inorganic barrier layer and a second silicon oxynitride film layer; the mixed barrier layer is made of organic compounds, metal oxides and metal; the organic compounds include at least one type of TAPC, NPB, Alq<3>, m-MTDATA, BCP and TPBi; the metal oxides include at least one type of molybdenum oxide, vanadium oxide, tungsten oxide, cesium oxide, nickel oxide and manganese dioxide; the metal includes at least one type of silver, aluminum, nickel, gold, copper and platinum; the first silicon oxynitride film layer and the second silicon oxynitride film layer are made of silicon oxynitride; the inorganic barrier layer is made of metal fluorides and metal sulfides. The transparent organic light-emitting device has the advantages that the packaging layer is compact in structure, and erosion of the organic compounds and electrodes in the device due to water and oxygen can be effectively reduced.

Description

technical field [0001] The invention relates to the technical field of organic electroluminescent devices, in particular to a transparent organic electroluminescent device and a preparation method thereof. Background technique [0002] For the existing organic electroluminescent devices (OLED), according to the different light emitting surfaces, it can be divided into three categories: bottom emitting organic electroluminescent devices (BOLED), top emitting organic electroluminescent devices (TEOLED) and transparent organic electroluminescent devices (TOLEDs). The difference between transparent organic electroluminescent device (TOLED) and top emitting organic electroluminescent device (TEOLED) and bottom organic electroluminescent device (BOLED) is that both the cathode and the anode are made of transparent materials, so that the light generated in the emitter The light is emitted from both the cathode and anode sides simultaneously. The transparent organic electrolumines...

Claims

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Application Information

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IPC IPC(8): H01L51/50H01L51/52H01L51/54H01L51/56
Inventor 周明杰钟铁涛王平陈吉星
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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