Abstract: The present invention relates to the technical field of catalyst preparation, disclosing a preparation method and application of a coated vanadium-tungsten-titanium oxide monolithic SCR catalyst. The method includes the steps of mixing a vanadium oxide precursor, a tungsten oxide precursor, titanium dioxide, an inorganic adhesive, an organic adhesive and a macromolecular surfactant with deionized water and stirring them to obtain a thick liquid; adding a pH adjuster to the thick liquid to make its pH 1.5-4.5; impregnating a cordierite honeycomb carrier in the thick liquid to obtain a preliminarily-impregnated catalyst and dried and calcined the preliminarily-impregnated catalyst to obtain a finished catalyst. The method has advantages such as simple operation, easy repetition and short time-consuming, so it can be applied to exhaust gas post-treatment of a marine diesel engine, and provide a good choice for catalysts used to denitrify medium and high temperature exhausted gas from marine engines.

Abstract: Disclosed is an organic light-emitting diode device (OLED) structure, in particular to a high-efficiency organic light-emitting diode device comprising a boron-containing compound. The organic light-emitting diode device prepared by the present invention comprises: an anode, a hole injection or transport layer, a light-emitting layer, an electron injection or transport layer, and a cathode, wherein the light-emitting layer comprises a host material and a doping material, the host material can be composed of a single material or a mixture of materials with different structures; the doping material is a boron-containing organic compound with a singlet-triplet energy gap of not more than 0.2 eV; the singlet and triplet energy levels of the host material are higher than those of the doping material, which can prevent the energy return and avoid the reduction in the light emitting efficiency of the device. Further provided is a preparation method of the organic light-emitting diode device.

Abstract: The present invention relates to an exciplex and excimer system-based organic electroluminescent device. The host material of the light emitting layer comprises first, second and third organic compounds. A mixture or lamination formed by the first and second organics produces an exciplex under light or electrical excitation. The third organic compound is doped in the mixture or a layer of the lamination formed by the first and second organic compounds, and the third organic compound forms an excimer. The singlet energy level of the exciplex is higher than the singlet energy level of the third organic compound, and the triplet energy level thereof is higher than the triplet energy level of the third organic compound. The device of the present invention has the characteristics of high efficiency and long service time.

Abstract: The disclosure relates to an electroluminescent device based on a boron-containing organic compound. A host material comprises a first organic compound and a second organic compound. A difference value between the singlet energy level of the first organic compound and the triplet energy level of the first organic compound is no greater than 0.2 eV; the singlet energy level of the second organic compound is greater than that of the first organic compound by 0.1 eV or more, and the triplet energy level of the second organic compound is greater than that of the first organic compound by 0.1 eV or more; furthermore, the first organic compound and the second organic compound have different carrier transport characteristics; a guest material is an organic compound containing boron atoms, the singlet energy level of the guest material is lower than that of the first organic compound, and the triplet energy level of the guest material is lower than the singlet energy level of the first organic compound.

Abstract: The disclosure relates to an organic electroluminescent device with an exciplex as a host material, particularly to an organic electroluminescent device comprising a host material and a fluorescent material. The host material comprises a first organic compound and a second organic compound; a mixture or interface formed by the first organic compound and the second organic compound generates the exciplex under the condition of optical excitation or electric field excitation; the emission spectrum of the formed exciplex and the absorption spectrum of the fluorescent doping material have effective overlapping to form effective energy transfer; furthermore, the first organic compound and the second organic compound have different carrier transport characteristics; wherein the fluorescent material is an organic compound containing boron atoms. The organic electroluminescent device prepared by the method has the characteristics of high efficiency and long lifetime.

Abstract: Disclosed is an organic light-emitting diode device (OLED) structure, in particular to a high-efficiency organic light-emitting diode device comprising a boron-containing compound. The organic light-emitting diode device prepared by the present invention comprises: an anode, a hole injection or transport layer, a light-emitting layer, an electron injection or transport layer, and a cathode, wherein the light-emitting layer comprises a host material and a doping material, the host material can be composed of a single material or a mixture of materials with different structures; the doping material is a boron-containing organic compound with a singlet-triplet energy gap of not more than 0.2 eV; the singlet and triplet energy levels of the host material are higher than those of the doping material, which can prevent the energy return and avoid the reduction in the light emitting efficiency of the device. Further provided is a preparation method of the organic light-emitting diode device.