Electroluminescent device based on exciplex system and matched with boron-containing organic compound

A technology for electroluminescent devices and organic compounds, which is applied in the fields of electro-solid devices, semiconductor devices, and semiconductor/solid-state device manufacturing, etc., can solve the problem of concentration of triplet state base sub-density, reduction of carrier recombination rate, and low S1 state radiation transition rate. And other issues
CN110492009AActive Publication Date: 2019-11-22JIANGSU SUNERA TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JIANGSU SUNERA TECH CO LTD
Publication Date
2019-11-22

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Abstract

The invention relates to an electroluminescent device based on an exciplex system and matched with a boron-containing organic compound, wherein a subject material contains a first organic compound anda second organic compound, the difference between the HOMO energy level of the first organic compound and the HOMO energy level of the second organic compound is 0.2 eV or more, and the difference between between the LUMO energy level of the first organic compound and the LUMO energy level of the second organic compound is 0.2 eV or more. A mixture or an interface formed by the first organic compound and the second organic compound generates an exciplex under the excitation of the light or an electric field, the singlet energy level of the exciplex is higher than that of an object material, and the triplet energy level of the exciplex is higher than that of the object material. The first organic compound and the second organic compound have different carrier transport characteristics, andthe object material is the boron-containing organic compound. An organic light-emitting device prepared by the method has the characteristics of high efficiency and long service life.
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Description

technical field

[0001] The invention relates to the field of semiconductor technology, in particular to a high-efficiency, long-life organic electroluminescent device, Background technique

[0002] Organic light emitting diodes (OLEDs) have been actively researched and developed. The simplest basic structure of an organic electroluminescent device consists of a light emitting layer sandwiched between opposing cathode and anode. Organic electroluminescent devices are considered to be the next generation of flat panel display materials and have attracted widespread attention due to their ultra-thin, ultra-light weight, fast response to input signals, and low-voltage DC drive.

[0003] It is generally believed that organic electroluminescent devices have the following light-emitting mechanism: when a voltage is applied between electrodes sandwiching a light-emitting layer, electrons injected from the anode and holes injected from the cathode recombine in the light-emitting lay...

Claims

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