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Organic electroluminescent material and organic electroluminescent device

An electroluminescent and organic technology, applied in the field of luminescent materials and light-emitting devices, can solve the problems of low luminous efficiency and high triplet energy gap of light-emitting devices, and achieve the effect of increasing luminous efficiency and thermal stability

Active Publication Date: 2016-11-23
HANNSTAR DISPLAY NANJING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high triplet energy gap of blue-light guest materials often leads to low luminous efficiency of blue-light organic electroluminescent devices due to energy back-transport.

Method used

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  • Organic electroluminescent material and organic electroluminescent device
  • Organic electroluminescent material and organic electroluminescent device
  • Organic electroluminescent material and organic electroluminescent device

Examples

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no. 1 example

[0038] The organic electroluminescent material according to the first embodiment of the present invention has the following structure of formula (1).

[0039]

[0040] The structure of the above formula (1) is a polycyclic nitrogen-containing heterocyclic organic compound, when R 2 , R 4 , R 6 , R 9 or R 13 When all are independently independent hydrogen atoms, the structure of formula (1) is N-phenylcarbazole (N-phenylcarbazole, NPC), which belongs to carbazole derivatives, or called carbazole group. And in this example, R 2 , R 4 , R 6 , R 9 or R 13 One or both of them can be independent triazole derivatives respectively, and the triazole derivatives described in this embodiment are derivatives having the structure of the following formula (2).

[0041]

[0042] That is to say, this embodiment utilizes the nitrogen atom on the triazole derivative to be connected to R on the N-phenylcarbazole 2 , R 4 , R 6 , R 9 or R 13 One or two of them to form a double ...

no. 2 example

[0051] figure 2 is a schematic diagram of the organic electroluminescent device of the second embodiment of the present invention, please refer to figure 2 shown. The organic electroluminescent device 2 of this embodiment includes a first electrode layer 21, a second electrode layer 22, and an organic light emitting unit 23, wherein the organic light emitting unit 23 is disposed on the first electrode layer 21 and the second electrode layer 22 between. Wherein, the organic light-emitting unit 23 includes at least one organic electroluminescent material, and the organic electroluminescent material is the organic electroluminescent material (carbazole derivative) described in the first embodiment, so its details can refer to the first embodiment For example, no further details are given here.

[0052]In this embodiment, the first electrode layer 21 is disposed on a substrate 24, wherein the substrate 24 is selected from at least one of a rigid substrate, a flexible substrat...

Embodiment 1

[0064] Embodiment one : Synthesis of Compound O-1

[0065]

[0066] Take carbazole (compound 1, 0.30g, 1.8mmol), 1-fluoro-3-nitrobenzene (1-fluoro-3-nitrobenzene, 0.25g, 1.8mmol), dimethylsulfoxide (dimethylsulfoxide, 5mL) Put into a single-necked bottle (10mL). After stirring with a magnetic stirring bar until the solid was dissolved, cesium carbonate (0.64 g, 2.0 mmol) was added and reacted at room temperature for 18 hours. Then, after adding deionized water (5mL), a yellow solid was produced, which was extracted three times with chloroform (30mL), the organic layer was collected and washed three times with deionized water (30mL), and the organic layer was dried with anhydrous magnesium sulfate , and then concentrated by gyratory to remove the solvent and compound 2 (0.49 g) was obtained with a yield of 94%.

[0067] Next, take compound 2 (2.0g, 6.9mmol), tin(II) chloride dihydrate (tin(II) chloride dihydrate, 7.83g, 34.7mmol), ethyl acetate (34.5mL), ethanol (ethanol...

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Abstract

The invention provides an organic electroluminescent material and an organic electroluminescent device. The organic electroluminescent material adopts the structure as shown in the formula (1) in the specification, wherein one or two of R2, R4, R6, R9 or R13 is or are an independent triazole derivative, and the triazole derivative has the structure shown in the formula (2).

Description

technical field [0001] The present invention relates to a luminescent material and a luminescent device, in particular to an organic electroluminescent material and an organic electroluminescent device. Background technique [0002] With the advancement of electronic technology, light-weight and high-efficiency display devices, such as liquid crystal display devices, are also flourishing. However, liquid crystal display devices have some disadvantages, such as insufficient viewing angle and fast response time, and liquid crystal display devices need to use polarizers and backlights, thus increasing power consumption, weight and cost. [0003] Therefore, the organic electroluminescent display (Organic Electroluminescent Display) has become the next-generation flat-panel display device due to its advantages such as self-illumination, no viewing angle limitation, power saving, easy process, low cost, high response speed, and full color. [0004] figure 1 is a schematic diagra...

Claims

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Application Information

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IPC IPC(8): C07D403/10C07D403/04C07D403/14C09K11/06H01L51/54
CPCC09K11/06C07D403/04C07D403/10C07D403/14C09K2211/1059H10K85/6572
Inventor 黄昭郡梁文杰江佑鳞李君浩
Owner HANNSTAR DISPLAY NANJING
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