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Phenylpyridine-containing compound, preparation method, organic electroluminescent device and display element

A technology of phenylpyridine and compounds, which is applied in the field of semiconductor materials, can solve the problems of material phase separation or decomposition, insufficient heat resistance stability, electron tolerance defects, etc., and achieve high glass transition temperature and good electron mobility , Improve the photoelectric performance and the effect of device life

Pending Publication Date: 2022-05-13
JIANGSU SUNERA TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the thermal stability of the current electron transport materials is insufficient, and the electronic tolerance of the materials is defective, which leads to phase separation or decomposition of the materials when the device is working.

Method used

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  • Phenylpyridine-containing compound, preparation method, organic electroluminescent device and display element
  • Phenylpyridine-containing compound, preparation method, organic electroluminescent device and display element
  • Phenylpyridine-containing compound, preparation method, organic electroluminescent device and display element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0108] Embodiment 1: the synthesis of compound 1:

[0109]

[0110] In the three-necked flask, nitrogen was introduced, 0.022mol of intermediate A-1, 100ml of DMF, 0.02mol of intermediate B-1, 0.0002mol of palladium acetate were added, stirred, and then 0.03mol of K 3 PO 4 Aqueous solution, heating and reflux reaction for 16 hours, sampling plate, the reaction is complete. Cool naturally, pour the reaction solution into a 500ml beaker, add 250ml distilled water, and carry out mechanical stirring for 20min, then the mixed solution is suction filtered, the filter cake is rinsed twice with 200ml distilled water, and then rinsed with 100ml ethanol to obtain White solid powder. Finally, the white solid powder was purified by a silica gel column with an eluent of ethyl acetate:petroleum ether=1:4 to obtain Compound 1 with a HPLC purity of 99.14% and a yield of 65.7%. Elemental analysis structure (molecular formula C 44 h 28 N 4 O): theoretical value C, 84.06; H, 4.49; N, 8....

example 3

[0138] An organic electroluminescent device was prepared in the same manner as in Device Example 1, except that the compounds shown in Table 2 were used to replace the electron-transport compound 1 in Device Example 1, wherein the ratio of the electron-transport compound and Liq was 1:1, control the evaporation rate as and The specific device structure is shown in Table 4.

[0139] After the fabrication of the electroluminescence device was completed according to the above steps, the efficiency data and light decay lifetime of the device were measured, and the results are shown in Table 5. The molecular structure formula of the relevant material is as follows:

[0140]

[0141] The structures of comparative compounds ET-1, ET-2 and ET-3 are given above. All the above materials are commercially available.

[0142] Table 4

[0143]

[0144]

[0145]

[0146] III. Device Test Example

[0147]The devices prepared in II were tested to test their driving voltage,...

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Abstract

The invention relates to the technical field of semiconductor materials, in particular to a phenylpyridine-containing compound, a preparation method, an organic electroluminescent device and a display element. The structure of the compound is as shown in a general formula (1), a dibenzofuran substituted triazine structure is taken as a core, a phenylpyridine group is connected, and the formed compound has the characteristics of higher glass transition temperature and molecular thermal stability, good electron mobility, lower evaporation temperature, proper HOMO / LUMO energy level and the like. When the compound is used as a material of the organic electroluminescent device, the driving voltage, the current efficiency and the service life of the device are remarkably improved.

Description

technical field [0001] The invention relates to the technical field of semiconductor materials, in particular to a compound containing phenylpyridine, a preparation method, an organic electroluminescent device and a display element. Background technique [0002] Organic electroluminescent device (OLED: Organic Light Emission Diodes) technology can be used to manufacture new display products, and also can be used to make new lighting products, which is expected to replace the existing liquid crystal display and fluorescent lighting, and has a wide application prospect. The OLED device has a sandwich-like structure, including electrode material film layers and organic functional materials sandwiched between different electrode film layers. Various functional materials are stacked together according to the application to form an OLED light-emitting device. OLED light-emitting devices are current devices. When a voltage is applied to the electrodes at both ends, and the positive...

Claims

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Application Information

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IPC IPC(8): C07D405/14C09K11/06H01L51/50H01L51/54
CPCC07D405/14C09K11/06C09K2211/1011C09K2211/1029C09K2211/1059C09K2211/1088H10K85/615H10K85/626H10K85/654H10K85/6574H10K85/6572H10K50/16
Inventor 叶中华张兆超李崇崔明
Owner JIANGSU SUNERA TECH CO LTD
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