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Method for preparing organic luminous device with red light

An organic light-emitting device, red light technology, applied in chemical instruments and methods, light-emitting materials, electroluminescent light sources, etc., can solve the problems of concentration quenching and weakness of organic small molecule red light materials, achieve stable light emission, overcome the concentration The effect of quenching, efficient hole transport

Inactive Publication Date: 2006-06-14
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Although organic EL devices are close to practical applications, red organic electroluminescent devices are still a relatively weak link due to serious concentration quenching of organic small molecule red light materials.

Method used

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  • Method for preparing organic luminous device with red light
  • Method for preparing organic luminous device with red light
  • Method for preparing organic luminous device with red light

Examples

Experimental program
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Effect test

preparation example Construction

[0031] The preparation method of the organic light-emitting device of the invention is to prepare a hole transport layer, a light-emitting layer and an electron transport layer between the anode and the cathode. Specific steps are as follows:

[0032] 1. Anode:

[0033] The anode of the device is ITO (indium tin oxide) on a glass substrate, which can be purchased commercially. The anode material can also be selected from a variety of metal materials, and the work function of the material is suitable for greater than or equal to 4eV. Examples of such materials include carbon, aluminum, silver, gold, iron, cobalt, nickel, platinum, vanadium, palladium, and Alloys of these metals, but electrode materials are not limited to those exemplified. The preparation method of the anode layer can adopt methods such as vacuum vapor deposition and magnetron sputtering.

[0034] 2. Hole transport layer:

[0035] The hole-transporting material is poly-p-phenylene vinylene (PPV) or a deriva...

Embodiment approach

[0078] (1) anode

[0079] The anode is commercially purchased ITO glass, which is washed with detergent in deionized water for 30 minutes, then washed in acetone and ethanol for 15 minutes respectively, soaked in methanol, and the ITO glass is taken out of methanol, and the methanol is blown dry with nitrogen flow , and fixed on the base plate of the homogenizer.

[0080] (2) Hole transport layer

[0081] The mass percent concentration is 0.61% poly-p-phenylene vinylene (PPV) prepolymer methanol solution to cover the ITO glass, the molecular structure of the poly-p-phenylene vinylene prepolymer is as follows:

[0082]

[0083] Rotate at a speed of 3000rpm / s for 30 seconds to form a poly-p-phenylene vinylene (PPV) prepolymer film on the ITO glass, and heat the ITO glass at 160°C for 2 hours in a vacuum to obtain partially conjugated poly-p-phenylene Vinylene, the molecular structure is as follows:

[0084]

[0085] (3) Light-emitting layer

[0086] The obtained ITO gl...

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Abstract

This invention provides a preparation method for red light organic luminous devices including: preparing cavity transmission layer, a luminous layer and an electronic transmission layer between the anode and cathode, in which, the cavity transmission material is the polyparaphenylene or its ramification, the red light material is an organic small molecule red light material including an organic dye, a phosphorescence compound, a rare earth matching material and other non-polymer organic material emitting red light, since the polyparaphenylene or its ramification have extremely high stability and can realize high efficient cavity transmission, the processed products can emit stable and pure red light.

Description

technical field [0001] The invention belongs to the technical field of organic light emitting device processing, and in particular relates to a preparation method of an organic light emitting device. Background technique [0002] Organic electroluminescent display is currently recognized as a promising flat-panel display technology in the world, and its development has been under active research. Now the structure of organic electroluminescent devices is the most commonly used three-layer structure, that is, the anode and cathode Between them are hole transport layer, light emitting layer and electron transport layer, that is: anode / hole transport layer / light emitting layer / electron transport layer / cathode. The anode is injected, and then recombined in the light-emitting layer through the electron transport layer and the hole transport layer respectively to form an excited state. When the excited state returns to the ground state, energy is released in the form of light. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B33/10C09K11/06H05B33/14H05B33/20
Inventor 刘振刚陈志坚龚旗煌
Owner PEKING UNIV
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