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Polymer, electron injection layer, OLED device and display device

A technology of electron injection layer and polymer, which is applied in the direction of electric solid-state devices, lighting devices, electrical components, etc., can solve the problems of inability to print electron injection layer, reduce manufacturing cost, and high evaporation temperature, so as to reduce preparation cost and improve production efficiency. ability, the effect of reducing the interface barrier

Active Publication Date: 2019-01-18
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the current inkjet printing or spin coating technology, due to material limitations, can currently print hole injection layers, hole transport layers, light-emitting layers, and even electron transport layers, but cannot print electron injection layers. The injection layer is mainly alkali metal fluoride such as LiF, alkali metal compound Cs 2 CO 3 etc., or low work function metals such as Yb and Tm, these materials still need to be prepared by vacuum evaporation, and the evaporation temperature is high, which is not conducive to reducing manufacturing costs

Method used

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  • Polymer, electron injection layer, OLED device and display device
  • Polymer, electron injection layer, OLED device and display device
  • Polymer, electron injection layer, OLED device and display device

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preparation example Construction

[0062] The invention provides a kind of preparation method of above-mentioned polymer, comprises the following steps:

[0063] Aromatic dihalides and any one of the compounds shown in formula (7) to formula (12) undergo a Suzuki reaction to obtain the polymer described in the above technical scheme;

[0064]

[0065] Among them, R 1 is H or acyloxy, R 2 , R 3 , R 4 Respectively selected from hydrogen, straight chain alkyl or branched chain alkyl containing 1 to 24 carbon atoms, or straight chain alkoxy or branched chain alkoxy containing 1 to 24 carbon atoms; R 5 For the borate group.

[0066] The preparation method is specifically:

[0067] Aromatic dihalides, any one compound shown in formula (7) ~ formula (12) and alkali are mixed uniformly in a solvent, and Suzuki reaction occurs under the action of palladium catalyst, then through concentration and separation, to obtain unit A and B A polymer formed by alternating copolymerization of units.

[0068] The molar ra...

Embodiment 1

[0154] 1. Synthesis of Monomer Benzenethiol-2,5-bis(cyclopropaneboronate)

[0155]Weigh 2,5-dibromobenzenethiol (2.66g, 10mmol) into a reaction flask, add anhydrous tetrahydrofuran solution under nitrogen protection, place the reaction flask in a dry ice and acetone bath, and drop the temperature to -78°C , a solution of n-butyllithium in n-hexane (1.6M, 7.2ml, 12mmol) was slowly added dropwise thereto. After reacting for 45 minutes, trimethyl borate (2.75 g, 26.7 mmol) was injected with a syringe, and then the reaction solution was gradually raised to room temperature and stirred for 12 hours. After the reaction of the raw materials was completed, the reaction system was placed in an ice-water bath to reduce to 0° C., stirred, and then a dilute sulfuric acid solution (2N, 50 ml) was slowly added dropwise, and the stirring was stopped after the dropwise addition was completed. At this time, the reaction system was divided into two phases, water and oil, and the oil phase was ...

Embodiment 2

[0165] 1. Provide a substrate (both rigid and flexible), on which there is an array of thin film transistors required for driving and compensating the OLED, and a metal anode ITO / Ag / ITO is prepared on the array substrate, through exposure and development, Processes such as etching form the desired pattern, and there is an inkjet-printed pixel-defining layer on top of the anode.

[0166] 2. Spin coating or inkjet printing to form hole injection layer, hole transport layer, light emitting layer, electron transport layer and electron injection layer.

[0167] a) The anode modification layer is formed by spin coating, that is, the hole injection layer. The hole injection layer is a PEDOT:PSS film, which has the advantages of high electrical conductivity, good environmental stability and high transmittance. The main function is Modify the ITO anode, reduce the probability of device short circuit and reduce the turn-on voltage of OLED, etc. The preparation method of the thin film i...

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Abstract

The invention relates to the display field and particularly relates to a polymer, an electron injection layer, an OLED device and a display device. The polymer contains a unit A and a unit B, whereinthe component A is an aromatic group; the unit B is any one group represented by formulae (1)-(6) (shown in the description). The electron injection layer contains the polymer. The OLED device comprises an anode, a cavity injection layer, a cavity transmission layer, a luminescent layer, an electron transmission layer, an electron injection layer and a cathode which are arranged in a stacking manner. The electron injection layer can be directly prepared from the polymer in an ink-jet printing manner, so that the preparation cost of the OLED device is lowered. By utilizing the polymer as the electron injection layer, the compatibility between a metal electrode and the electron injection layer is improved, the effects of adjusting the surface shape of an electrode interface and the work function of the electrode are achieved, and the ideal ohmic contact between the metal electrode and the electron injection layer is realized.

Description

technical field [0001] The invention relates to the display field, in particular to providing a polymer, an electron injection layer, an OLED device and a display device. Background technique [0002] Organic light emitting diode (OLED for short) device is a new generation of display device with advantages such as self-illumination, fast response, wide viewing angle, high brightness, color salt, light and thin, etc. compared with LCD. [0003] The current mainstream OLED manufacturing technology is to use a vacuum chamber to heat the organic material to sublimate it, and then deposit it on the array substrate; this process not only requires a high vacuum chamber, but also requires a fine metal mask (Fine Metal Mask, FMM) For the preparation of RGB sub-pixels, this preparation method has high equipment cost and maintenance, low material utilization rate (10%-20%), and it is difficult to enlarge the size, so it is more suitable for the preparation of small-sized OLEDs. [000...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G61/12H01L51/50H01L51/54H01L51/56H10K99/00
CPCC08G61/126C08G2261/3223C08G2261/411C08G2261/144C08G2261/124C08G2261/95H10K71/12H10K71/135H10K85/151H10K50/171H10K71/00H10K71/40C08G2261/145C08G2261/18C08G2261/228C08G2261/312C08G2261/514H05B33/22C09D11/52C09D11/102C09D11/30H10K85/113H10K2102/351
Inventor 牟鑫丁文彪
Owner BOE TECH GRP CO LTD
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