Luminescent composition and luminescent layer and electroluminescence device comprising same

A composition and group technology, applied in the direction of electrical solid devices, electrical components, luminescent materials, etc., can solve the problems of concentration quenching, lack of host materials, and scarcity of blue phosphorescent materials

Inactive Publication Date: 2019-04-19
AAC TECH NANJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although organic light-emitting materials have made great progress, such as red and green phosphorescent materials have been commercialized, and blue fluorescent materials are also widely used in organic electroluminescent devices, the commercialization of blue phosphorescent materials is slow. And difficult, because the blue material in commercialization is a blue fluorescent material, the efficiency of blue light-emitting devices has not been high
There are two main problems in blue light-emitting devices: one is that stable blue phosphorescent materials are very scarce, and the other is the lack of host materials with high triplet energy.
Although the guest material has high luminous efficiency, it also has the problem of concentration quenching.

Method used

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  • Luminescent composition and luminescent layer and electroluminescence device comprising same
  • Luminescent composition and luminescent layer and electroluminescence device comprising same
  • Luminescent composition and luminescent layer and electroluminescence device comprising same

Examples

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Effect test

Embodiment 1

[0157] The tetrahydrofuran solution was passed through a 0.25-micron filter membrane, and moved into a glove box filled with nitrogen gas. Nitrogen gas was passed into the tetrahydrofuran solution, and the air was removed by bubbling for 30 minutes. The host material HS-13 was dissolved in the above-treated tetrahydrofuran to prepare a 100 micromolar (100 μM) solution. The intensity of the emission peak of the host material HS-13 at this concentration was measured. Weigh the same weight of the guest material Pt-36, and add it to the above solution in sequence, so that the concentration of Pt-36 in the solution is 10 μM, 20 μM, 30 μM, 40 μM, 50 μM, 60 μM, 70 μM. For each concentration change, measure the peak intensity of the host material at the corresponding concentration.

Embodiment 2

[0159] The tetrahydrofuran solution was passed through a 0.25-micron filter membrane, and moved into a glove box filled with nitrogen gas. Nitrogen gas was passed into the tetrahydrofuran solution, and the air was removed by bubbling for 30 minutes. The host material HS-13 was dissolved in the above-treated tetrahydrofuran to prepare a 100 micromolar (100 μM) solution. The intensity of the emission peak of the host material HS-13 at this concentration was measured. Weigh the same weight of the guest material Pt-45, and add it to the above solution in sequence, so that the concentration of Pt-45 in the solution is 10 μM, 20 μM, 30 μM, 40 μM, 50 μM, 60 μM, 70 μM. For each concentration change, measure the peak intensity of the host material at the corresponding concentration.

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PUM

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Abstract

The invention discloses a luminescent composition. A Pt(II)-quadridentate ligand metal complex is taken as the guest material; biscarbazolyl pyridine or biscarbazolyl pyrazine and derivatives thereofis taken as the host material; the host material has high triplet energy, and thus high energy transmission efficiency exists between the host material and the guest material. The provided luminescentcomposition is well compatible with a blue / green / yellow / orange / red guest material. The invention also provides a luminescent layer and electroluminescence device comprising the luminescent composition at the same time.

Description

technical field [0001] The invention relates to the field of organic electroluminescent materials, in particular to a luminescent composition, a luminescent layer comprising the luminescent composition, and an electroluminescent device. Background technique [0002] The use of organic materials to prepare various functional devices, especially for photoelectrically responsive functional devices, such as common organic electroluminescent devices, organic solar cell devices, organic field effect transistor devices and organic photosensitive sensor devices, has attracted more and more attention. . [0003] Organic electroluminescent materials (abbreviated as EL or OLED) refer to high molecular or small molecular organic materials that can emit light under the action of an electric field. Organic electroluminescent devices containing organic electroluminescent materials are a device technology that achieves electroluminescence by introducing one or more layers of organic films ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D401/14C07D471/04C09K11/06H01L51/50H01L51/54
CPCC09K11/06C07D401/14C07D471/04C09K2211/1007C09K2211/1029C09K2211/1044H10K85/6572H10K50/11
Inventor 黄达马腾达尤聪孙晓媛高琴
Owner AAC TECH NANJING
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