Organic electroluminescence apparatus and preparation method thereof

An electroluminescent device and electroluminescent technology, which are applied in the manufacturing/processing of organic semiconductor devices, circuits, electrical components, etc., can solve the problem of poor performance of the light-emitting device, reducing the ability of electron injection into the organic light-emitting layer, poor light-emitting effect, etc. question

Inactive Publication Date: 2014-07-16
OCEANS KING LIGHTING SCI&TECH CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the prior art, an inverted organic electroluminescent device that emits light from below usually uses a thin layer of metal with a low work function to prepare the cathode, and the light transmittance of the cathode is only 60% to 70%, and the luminous effect is not good.
Moreover, materials with low work function are too active, which affects the packaging stability
[0004] If the transparent conductive oxide film is used as the cathode, due to its high work function, the electron injection ability to the organic light-emitting layer will be reduced. The electron injection ability is one of the main factors determining the luminous brightness and luminous efficiency of the organic electroluminescent device. Therefore, , lower electron injection ability will lead to poor performance and low luminous efficiency of organic electroluminescent devices

Method used

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  • Organic electroluminescence apparatus and preparation method thereof
  • Organic electroluminescence apparatus and preparation method thereof

Examples

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Embodiment 1

[0077] A method for preparing an organic electroluminescent device, comprising the steps of:

[0078] Place the glass substrate in deionized water containing detergent for ultrasonic cleaning. After cleaning, use isopropanol and acetone in ultrasonic treatment for 20 minutes, and then blow dry with nitrogen;

[0079] In a vacuum of 1×10 -4 In Pa's vacuum coating system, the indium tin oxide film (ITO) is prepared as the cathode on the surface of the glass substrate by sputtering at a speed of 0.1nm / s;

[0080] Through thermal evaporation process, in a vacuum of 1.0×10 -4 Evaporation of Au, Au and TiO in sequence under Pa and speed of 0.02nm / s 2 The pn junction layer is prepared by mixing the mixed material and Li according to the mass ratio of 1:4; then through the thermal evaporation process, in a vacuum of 1.0×10 -4 Under the conditions of Pa and speed 0.02nm / s, TPBi was evaporated sequentially, and C545T was doped to Alq according to the doping mass fraction of 15%. 3 T...

Embodiment 2

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

[0085]Place the glass substrate in deionized water containing detergent for ultrasonic cleaning. After cleaning, use isopropanol and acetone in ultrasonic treatment for 20 minutes, and then blow dry with nitrogen;

[0086] In a vacuum of 1×10 -5 In Pa's vacuum coating system, aluminum-zinc oxide film (AZO) was sputtered on the surface of the glass substrate at a speed of 1nm / s as the cathode;

[0087] Through thermal evaporation process, in a vacuum of 1.0×10 -5 Cu, Cu and Ta were sequentially evaporated under the conditions of Pa and speed 0.5nm / s 2 o 5 The pn junction layer is prepared by mixing the mixed material and Cs according to the mass ratio of 1:2; then through the thermal evaporation process, the vacuum degree is 1.0×10 -5 Under the conditions of Pa and speed 0.5nm / s, Bphen was evaporated sequentially, and DCJTB was doped to Alq according to the doping mass fraction of...

Embodiment 3

[0090] A method for preparing an organic electroluminescent device, comprising the steps of:

[0091] Place the glass substrate in deionized water containing detergent for ultrasonic cleaning. After cleaning, use isopropanol and acetone in ultrasonic treatment for 20 minutes, and then blow dry with nitrogen;

[0092] In a vacuum of 1×10 -3 In Pa's vacuum coating system, a gallium zinc oxide film (GZO) is prepared as a cathode on the surface of a glass substrate by sputtering at a speed of 0.5nm / s;

[0093] Through thermal evaporation process, in a vacuum of 1.0×10 -3 Under the conditions of Pa and speed 0.2nm / s, Ni, Ni and NiO are mixed according to the mass ratio of 1:5 to form a mixed material and Rb to prepare the pn junction layer; -3 Under the conditions of Pa and speed 0.2nm / s, TAZ, Rubrene, 2-TNATA, VOPc and Ni were sequentially evaporated to prepare electron transport layer, light emitting layer, hole transport layer, hole injection layer and anode, respectively.

...

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Abstract

The invention provides an organic electroluminescence apparatus and a preparation method thereof. In the organic electroluminescence apparatus prepared by using the method, a transparent conductive oxide film is employed as a cathode, a pn junction layer is arranged between an organic luminescence function layer and the cathode, and the pn junction layer comprises a first metal layer, an intermediate layer and a second metal layer which are successively stacked, such that the electron injection capability is improved, and a stable and uniform luminous effect is obtained. The preparation method is simple in process, free from pollution and easy to control, and facilitates industrial production.

Description

technical field [0001] The invention belongs to the technical field of organic electroluminescence, and in particular relates to an organic electroluminescence device and a preparation method thereof. Background technique [0002] An organic electroluminescent device is an energy conversion device that uses organic materials as light-emitting materials and can convert applied electrical energy into light energy. It has outstanding properties such as ultra-thin, self-luminous, fast response, low power consumption, etc. It is a display technology and light source with great potential, which meets the development trend of mobile communication and information display in the information age, as well as the requirements of green lighting technology. At present, it is the focus of many researchers at home and abroad. [0003] Organic electroluminescent devices can be configured with thin-film transistors (TFTs) to form large-area, high-efficiency active matrix organic light-emitti...

Claims

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Application Information

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IPC IPC(8): H01L51/52H01L51/56
CPCH10K50/826H10K50/82H10K71/00
Inventor 周明杰王平冯小明钟铁涛
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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