40results about How to "Appropriate energy level" patented technology

The present invention relates to an organic material comprising a spiro ring (benzo[de]anthracene-7.9'-fluorene) and an organic electroluminescent device using the same, and more specifically, to a new spiro ring that can be used in an organic electroluminescent device Type organic compounds and organic electroluminescent devices with excellent characteristics such as low power and high efficiency by using them.

The invention relates to a hole-transporting polymer containing benzyl alcohol groups and its application in perovskite solar cells, belonging to the field of perovskite solar cells. The object of the present invention is to provide a polymer hole transport material containing benzyl alcohol groups. The polymer main chain of this material is composed of triarylamine repeating units to ensure that it has a suitable HOMO energy level and hole mobility; the side chain introduces benzyl alcohol groups to improve the hydrophilicity of the polymer, which can realize calcium titanium The complete and uniform coverage of the mineral layer on the surface of its film. In addition, the repeating unit of the polymer is easy to synthesize, and the raw material is cheap, which reduces the development cost of the material. These are conducive to the application of such polymer hole transport materials in high-efficiency and large-area devices, and have good application prospects.

The invention discloses an organic n-type semiconductor polymer material based on naphthalimide-selenophene and its preparation method and application. Based on the long-chain naphthalimide as an electron-pulling unit, selenophene and its derivative diselenide The invention relates to an n-type organic conjugated polymer semiconductor material with electron-donating units and a preparation method thereof, and the application of the polymer as a cathode interface modification layer material in a perovskite solar cell. The n-type conjugated polymer semiconductor based on naphthalimide and selenophene derivatives disclosed by the present invention has the advantages of solution processing, high electron mobility, excellent thermal stability, and appropriate energy level, and is an ideal perovskite Solar cell cathode interface modification material.

The invention relates to a novel A-D-A conjugate small molecule and an application thereof in a photoelectric device. A novel D conjugate skeleton is synthesized through a one-pot method; each conjugate unit is a bridged bond; and different electron-withdrawing units are end groups. The conjugate small molecule has good absorption and appropriate energy level within a visible light range, is applied to a donor material and an acceptor material in an organic solar cell, and achieves excellent device efficiency.

The invention provides an aromatic amine derivative containing bifluorene and an organic electroluminescence device thereof, and relates to the technical field of organic photoelectric materials. The technical problem to be solved by the invention is the problem of poor stability of current hole transport materials and short service life of organic electroluminescent devices. The bifluorene-containing arylamine derivative of the formula I of the present invention uses bifluorene as a parent, and is connected to the arylamine through a single bond or a bridging group. The organic electroluminescent device of the present invention comprises an anode, an organic layer and a cathode, the organic layer is located between the anode and the cathode, and the organic layer contains the arylamine derivative containing bifluorene. The arylamine derivative containing bifluorene of the present invention has suitable energy level, higher hole mobility, better stability and better film-forming property, and the organic electroluminescent film containing the arylamine derivative The device has lower driving voltage, higher luminous efficiency and longer service life.

A phenanthroimidazole-based organic orange light small molecule, a preparation method and its application in electroluminescence devices belong to the technical field of organic electroluminescence. The present invention uses phenanthroimidazole as a donor and cyano-substituted p-phenylene vinylene as an acceptor. The phenanthroimidazole-based organic orange light small molecule of the novel D-π-A-π-D structure has very high fluorescence Quantum yield, good thermal stability and chemical stability, the evaporated film is flat and uniform, and can be used as a light-emitting layer in non-doped or doped organic electroluminescent devices (OLEDs). The prepared device has Low driving voltage, high current efficiency and external quantum efficiency and other characteristics, obtain good electroluminescence performance.