Organic electroluminescence device and production method thereof

An electroluminescent device and electroluminescent technology, which can be used in organic light-emitting devices, organic light-emitting device structures, organic semiconductor devices, etc., and can solve the problems of poor mechanical strength, high cost, and heavy weight.

CN104638160AInactive Publication Date: 2015-05-20OCEANS KING LIGHTING SCI&TECH CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2015-05-20
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention aims to provide an organic electroluminescence device with an encapsulation layer. The encapsulation layer includes organic barrier layers and mixed barrier layers which are stacked alternately. Each organic barrier layer is made of one of BeO, MgO, CaO, SrO and BaO. Each barrier layer is a mixture formed by mixing one of AlF3, HfF4, ZrF4, LiF, CeF2 and YF3 and beryllium straight-chain alkane with a structural formula showed in the description and the claims. In the structural formula, k is 1, 2, 3 or 4, and the molar ratio of fluoride is 20-40%. The encapsulation layer can effectively prevent external active substances such as water and oxygen from eroding the organic electroluminescence device and prolong the service life of the organic electroluminescence device. The invention further provides a production method of the organic electroluminescence device. The production method is simple in process, cheap in raw materials, and easy in large-area production.
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Description

technical field

[0001] The invention relates to the field of organic electroluminescence, in particular to an organic electroluminescence device and a preparation method thereof. Background technique

[0002] An organic electroluminescent device (OLED) 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 performances such as ultra-thin, self-luminous, fast response, low power consumption, etc., and has extremely broad application prospects in display, lighting and other fields.

[0003] Organic electroluminescent materials are particularly sensitive to oxygen and moisture intrusion. On the one hand, because oxygen is a quencher, the quantum efficiency of luminescence will be significantly reduced, and the oxidation of oxygen to the hole transport layer will also reduce its transport ability; on the other hand, water vapor will hydrolyze organic compounds, making...

Examples

Embodiment 1

[0087] An organic electroluminescent device is prepared through the following steps:

[0088] (1) Provide a clean anode conductive substrate:

[0089] Clean the ITO glass substrate with acetone, ethanol, deionized water, and ethanol in an ultrasonic cleaner in sequence, wash and wash for 5 minutes in one item, then blow dry with nitrogen, and dry in an oven for later use; surface activation of the cleaned ITO glass processing; ITO thickness is 100nm;

[0090] (2) Vacuum evaporation of the luminescent functional layer on the ITO glass substrate:

[0091] Specifically, the light emitting functional layer includes a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer and an electron injection layer;

[0092] Preparation of the hole injection layer: the MoO 3 The mixture obtained by mixing with NPB according to the mass ratio of 3:7 is used as the material of the hole injection layer, the thickness is 10nm, and the vacuum degree is ...

Embodiment 2

[0110] An organic electroluminescent device is prepared through the following steps:

[0111] (1), (2), (3) are the same as embodiment 1;

[0112] (4) Prepare the encapsulation layer on the outside of the cathode:

[0113] The encapsulation layer is an alternately stacked inorganic barrier layer and a mixed barrier layer;

[0114] Fabrication of the inorganic barrier layer: the organic electroluminescent device sample prepared with the cathode is placed in the deposition chamber of the atomic layer deposition system, and then,

[0115] (a) The metal source Mg(CpEt) 2 Inject nitrogen into the deposition chamber and deposit on the cathode, the injection time is 20ms, and the nitrogen flow rate is 20sccm;

[0116] (b) Inject nitrogen gas to flush the deposition chamber, the injection time is 10s, and the flow rate is 20 sccm;

[0117] (c) Water vapor is then injected into the deposition chamber along with nitrogen gas to react with the metal source. The injection time is 20 m...

Embodiment 3

[0123] An organic electroluminescent device is prepared through the following steps:

[0124] (1), (2), (3) are the same as embodiment 1;

[0125] (4) Prepare the encapsulation layer on the outside of the cathode:

[0126] The encapsulation layer is an alternately stacked inorganic barrier layer and a mixed barrier layer;

[0127] Fabrication of the inorganic barrier layer: the organic electroluminescent device sample prepared with the cathode is placed in the deposition chamber of the atomic layer deposition system, and then,

[0128] (a) The metal source Ca(CpEt) 2 Inject nitrogen into the deposition chamber and deposit on the cathode, the injection time is 10ms, and the nitrogen flow rate is 10sccm;

[0129] (b) Inject nitrogen gas to flush the deposition chamber, the injection time is 5s, and the flow rate is 10 sccm;

[0130] (c) Water vapor is then injected into the deposition chamber along with nitrogen gas to react with the metal source. The injection time is 10 ms...