30results about How to "Lower concentration quenching" patented technology

The invention discloses a fluoro phenylindole compound which adopts a structure shown in formula I, application of the fluoro phenylindole compound as a red organic luminescent material, and a preparation method of the fluoro phenylindole compound. The fluoro phenylindole compound is obtained through a reaction between cyclohexanone and 3-(3-(4-fluorophenyl)-1-isopropyl-1H-indole-2-yl) acrolein under an alkaline condition. The preparation method is simple to operate, convenient for synthesis and easy for purification; the obtained fluoro phenylindole compound is stable in structure and can be utilized for fluorescence conversion on a strong red color displayed under 800-nm laser excitation, thereby having potential application values in such fields as luminescent equipment, anti-counterfeit technologies, laser dye and fluorescence sensing; the research field of the fluoro phenylindole compound is expanded.

The invention discloses an alkali metal lanthanum bismuth gallate infrared optical glass and a preparation method thereof. The main components of the glass are Bi2O3, Ga2O3, La2O3 and R2O. Its preparation method includes (1) mixing the powders of each component evenly, heating to 1000°C-1300°C, and keeping it for 2 to 5 hours; (2) pouring the melt into a mold and cooling it naturally; (3) forming the glass The sample is annealed and kept at a temperature of 300° C. to 400° C. for 20 to 30 hours, and then cooled to room temperature. The obtained glass has wide infrared transmission characteristics, the transmission range can reach 0.5-7μm, good thermal stability, the difference between the crystallization temperature and the transition temperature ΔT can reach 150°C and a large refractive index, according to different components, The refractive index can reach 2.4-2.5. It is used in optical fields such as infrared detection and optical communication.

The invention discloses ground limestone-based bismuth and europium co-doped yellow fluorescent powder. According to the fluorescent powder, ground limestone is used as matrix, EU<3+> is used as an activating agent, Bi<3+> ions are used as a sensitizing agent, and alkali carbonate is used as a fluxing agent and a charge compensation agent; and the molar ratio of ground limestone to EU<3+> to Bi<3+> to M2CO3 is 100:(1-5):(1-15):(0.5-2.5), wherein M is one or more of Li<+>, Na<+> or K<+>. The invention also discloses a preparation method for the ground limestone-based bismuth and europium co-doped yellow fluorescent powder; and the preparation method comprises the following steps of: accurately weighing raw materials, fully grinding the raw materials in a ball grinding mill, mixing uniformly to form powder and thus obtaining precursor, pre-treating in a high-temperature furnace, grinding, calcining the precursor at CO2 atmosphere of standard atmospheric pressure, and grinding to obtain a sample. The provided preparation method for the fluorescent powder is simple, and the fluorescent powder is stable in performance, and high in luminous intensity and has important application value.

The invention discloses an aromatic amine derivative containing a benzophenone groupand a preparation method and application thereof. The aromatic amine derivative containing the benzophenone group provided by the invention has a unique triphenylamine group and the benzophenone group, has TICT and AIE effects, high luminous intensity and good hole transport ability, and can be used as a novel soluble light-emitting molecule which is good in performance, low in cost and highly distorted in space structure. The aromatic amine derivative can be widely applied to the fields of color display and solid-state lighting, and is used for preparing a luminescent material, a luminescent device or an intelligent material; when thearomatic amine derivative is used as OLED, the aromatic amine derivative containing the benzophenone group is taken as a host material and a phosphorescent material is taken as a guest material, so that the concentration quenching of the phosphorescent material can be reduced, the external quantum efficiency of the device is improved, and efficiency roll-off is reduced.

The invention discloses alkali metal gallate glass and a preparation method thereof. The glass comprises the following main components: Ga2O3, La2O3 and Na2O. The preparation method comprises the steps of (1) mixing powder of various components evenly, heating the power to 1550-1600 DEG C and keeping for 2-4h; (2) pouring a melt into a mold and naturally cooling; and (3) annealing a molded glass sample, keeping the temperature of 700-750 DEG C for 20-30h and then cooling to a room temperature. The glass has relatively good light absorption and emission characteristics and good thermal stability, and the refractive index can reach 1.7-1.8 according to different components. The alkali metal gallate glass can be applied to the optical field of optical waveguide and optical communication.

The invention discloses a thermal activation delayed fluorescence material capable of being processed by a solution, a preparation method and application thereof. The thermal activation delayed fluorescence material capable of being processed by a solution comprises a molecular structure, the molecular structure is composed of two parts, one part is a core with a thermal activation delayed fluorescence property, the other part is a structure with a high triplet state energy level, at most one of R1 and R2 is hydrogen, the other parts are all connected with oxygen through benzene rings, and oxygen connection has a structure with a high triplet state energy level. The novel material has great advantages, the concentration quenching of triplet excitons can be effectively reduced through the steric hindrance effect of peripheral branched chains, and the performance of a light-emitting device is improved; the introduction of benzene rings can effectively enhance the solubility and film-forming property of the material. The thermal activation delayed fluorescence material capable of being processed by the solution has a relatively large molecular weight and good film-forming property, and is suitable for preparing an organic light-emitting device by a wet method. And along with the increase of the peripheral branched chains, the performance of the device is greatly improved.

The invention discloses a compound, a display panel and a display device. The compound has a structure represented by formula (1), wherein X, Y, R1, R2, R3, R4, R5, R6, R7, m1, m2, m3 and m4 are as defined in the invention, respectively. The compound provided by the invention can be used for the display panel and the display device.