30results about How to "Improving Phosphorescent Quantum Efficiency" patented technology

The invention provides a long afterglow material and its preparation method and application. The long-lasting material is composed of carbon dots in the matrix, and is in a glassy state, and has the properties of fluorescence, delayed fluorescence and phosphorescence; the material has longer life, higher phosphorescence quantum efficiency, and better stability, and has been successfully fabricated from Heteroatom carbon dots have produced a metal-free afterglow material with a lifetime of up to 2682ms and a phosphorescent quantum efficiency of up to 17.5%. The present invention also provides a preparation method of the long afterglow material. The carbon dots and the matrix are subjected to one-step heat treatment to form a glassy state. The method has universal adaptability, and the obtained material has better phosphorescence effect, simple operation, low cost, It is green and environmentally friendly, has a wide range of applications, and can realize mass production. At the same time, the long afterglow material has achieved good results in the application of three-mode anti-counterfeiting technology and information encryption, and has broad application prospects in the field of optoelectronics, especially in the fields of anti-counterfeiting and information encryption technologies.

The present invention discloses a class of four-dentate ring metal platinum (II) phosphorescent luminescent material as shown in formula (I): wherein, the five-membered heteroaromatic group Ar is selected from one of the following: 2H-1, 2,3‑triazole where X 1 =N,X 2 =N,X 3 =CH); 1H-1,2,3-triazole wherein, X 1 =CH,X 2 =N,X 3 = N; 1,3,4-oxadiazole wherein, X 1 =O,X 2 =C,X 3 = N; oxazole wherein, X 1 =O,X 2 =C,X 3 =CH or thiazole wherein, X 1 =S,X 2 =C,X 3 =CH. The application of one or two or more of the four-ring metal platinum (II) phosphorescent luminescent materials in the present invention as a light-emitting layer of an organic light-emitting device. The four-ring metal platinum (II) phosphorescent luminescent material of the present invention has strong molecular rigidity, can effectively reduce the energy consumed by molecular vibration, has high phosphorescent quantum efficiency, and has good chemical stability and thermal stability.

The invention provides a phosphorescent polymer material and its preparation method and application, and relates to the technical field of organic light-emitting materials and anti-counterfeiting materials, which can obtain a pure organic polymer material with high-efficiency and long-life room temperature phosphorescence properties, and realize a substantial extension of phosphorescence life At the same time, the quantum efficiency of phosphorescence is improved, the preparation is simple, the raw materials are cheap, and the stability is good; the method effectively suppresses the non-radiative attenuation of various organic phosphors through a dense three-dimensional epoxy polymer network, thereby achieving simultaneous realization in the polymer film. Ultra-long lifetime and high quantum yield; the absolute phosphorescent quantum yield of the prepared phosphorescent polymer material is more than 8.35%, the phosphorescence lifetime is more than 2.28s; the phosphorescence property retention time at room temperature is more than 7s. The technical scheme provided by the invention is applicable to the process of preparing room temperature phosphorescent materials.

The present invention relates to an ionic phosphorescent metal complex and its preparation method and application. The structure of the complex is: [PtM 3 {(PPh 2 CH 2 ) 3 P}(C≡CR)}(C≡CR’)(μ‑Cl)] 2+ A n‑ 2 / n ; wherein, M is selected from Au (I) or Ag (I); R, R' the same or different, independently selected from: alkyl, alkenyl, alkynyl, aryl, heteroaryl; the alkyl Base, alkenyl, alkynyl, aryl, heteroaryl can be substituted by one or more substituents selected from the group consisting of alkyl, alkenyl, alkynyl, alkoxy, amino, halogen, haloalkane radical, aryl, heteroaryl; said substituent is optionally further substituted by one or more of the following groups: alkyl, alkoxyl, amino, halogen, haloalkyl, aryl, heteroaryl; A n‑ is a monovalent or divalent anion, n is 1 or 2; μ‑represents a bridge. The organic light-emitting diode prepared by using the complex as the dopant of the light-emitting layer has an external quantum efficiency greater than 10%, and can be applied in the fields of flat panel display and daily lighting.

The invention discloses thianthrene oxide-based yttrium complex phosphorescent luminescent materials and preparation methods thereof. The thianthrene oxide-based yttrium complex phosphorescent luminescent materials have general structural formulas shown in the description. The preparation methods comprise that an organic ligand containing a strong electron-withdrawing thianthrene oxide functionalgroup or other organic ligands and antimony trichloride undergo a reaction to produce a high electron injection transmission iridium complex phosphorescent material with phosphorescence quantum efficiency of 95% or more. The yttrium complex phosphorescent luminescent materials solve the problem that the traditional luminescent material has low phosphorescence quantum efficiency and weak electron injection transmission ability, and have an important application value in preparation of high performance organic light emitting diodes.

The invention relates to the technical field of organic electroluminescence display, specifically discloses a novel sulfur-containing organic electrophosphorescence luminescence material, and also discloses its application in organic electroluminescence devices. The sulfur-containing organic electrophosphorescent light-emitting material provided by the present invention has the structure shown by the general formula (I). When the organic electrophosphorescence light-emitting material of the present invention is applied to an organic electroluminescence device, the prepared electroluminescence device exhibits the superior properties of high purity, high brightness and high efficiency.