3results about How to "Reduce the starting voltage" patented technology

This invention provides a triarylboron-modified fluorescent material, its preparation method, and its applications. The triarylboron-modified fluorescent material is as shown in Compound I. The compound of this invention utilizes the electron-withdrawing ability and high steric hindrance of triarylboron to effectively accelerate the antisystem crossing rate of narrow-band luminescent materials, reducing intermolecular interactions, thereby improving quantum efficiency and suppressing the efficiency roll-off problem of organic electroluminescent devices. Furthermore, due to the typical electron-donating characteristics, strong resonance effect, and rigid molecular structure of this type of molecule, the emission spectrum becomes narrower, thus achieving very high purity green light emission.

The invention discloses an organic metal compound as well as a preparation method and application thereof, and relates to the technical field of organic electroluminescence. Functional groups such as benzene and biphenyl are introduced to a dibenzofuran ring main body, and electron withdrawing groups such as cyano or methyl are added to a benzene ring, so that compared with a contrast compound, the compound provided by the invention has the advantages that the molecular configuration is changed, a conjugated system is enlarged, and the electrochemical characteristics of the compound are adjusted; after the obtained organic compound is applied to the organic electroluminescent device, the starting voltage of the device is reduced, the luminous efficiency of the device is improved, and the service life of the device is prolonged.

This invention discloses an organometallic iridium complex, a luminescent material, and an organic electroluminescent device, relating to the field of organic electroluminescence technology. The structural formula of the organometallic iridium complex is shown in Formula I: ; wherein, R9, R... 10 R 11 and R 12 At least one of them is adamantane; R 13 R 14 and R 15 At least one of them is fluorine or cyano. This invention introduces electron-withdrawing groups, such as cyano or fluorine, onto the dibenzofuran ring host, thereby altering the molecular configuration of the compound, increasing the conjugated system, and regulating the electrochemical properties of the compound. This results in an organic compound that, when used in organic electroluminescent devices, lowers the device's startup voltage and improves its luminous efficiency and lifetime. Simultaneously, this invention adds adamantane at the pyridine position. The hydrophobicity of adamantane reduces the absorption of moisture by the OLED material, decreasing the corrosion of the device by water and oxygen, thus improving the material's lifetime.