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

The invention belongs to the field of pure organic long-afterglow materials and in particular relates to preparation and mechanism research of an efficient phosphorescent pure organic long-afterglow material. The material has the characteristics that (1) the material is synthesized by two steps, the raw materials are cheap and the synthetic method is simple; (2) the synthesized material is long inafterglow service life and high in quantum efficiency; and (3) a policy of improving the phosphorescent quantum efficiency is provided as different halogen bonds are formed by isomerization. The material provided by the invention has a huge potential in the fields of organic electroluminescence devices and counterfeiting prevention. It can be expected that the organic light-emitting materials area type of novel long-afterglow materials with huge commercialized potential.

The invention belongs to the field of photoelectric materials and particularly relates to an organic blue light electroluminescent material with the structural formula as shown in the figure p, wherein r is a hydrogen atom, c1-c20 alkyl or c1-c20 alkoxy. The organic blue light electroluminescent material has relatively high lumo energy level and relatively low homo energy level so as to be beneficial to blue shift of light emitting wavelength of the organic blue light electroluminescent material; and the organic blue light electroluminescent material also has relatively high phosphorescent quantum efficiency as well as relatively good dissolving property and processability. The invention also provides a preparation method of the organic blue light electroluminescent material and application of the organic blue light electroluminescent material to an organic electroluminescent device.

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 invention relates to an ionic phosphorescent PtM2 complex, a preparation method and a purpose thereof. A structure of the complex is shown in a [PtM2{PhP(CH2PPh2)2}2(C=CR1)(C=CR2)]<2+>A<n->2 / n. M is optionally selected as Cu(I), Ag(I) and Au(I); R1 and R2 can be same or different, and can be independently selected from heteroaryl, -aryl-heteroaryl, the heteroaryl and aryl can be substituted by one or more substituent, the substituent is independently selected from alkyl, alkenyl, alkynyl, alkyloxy, amino, halogen, alkylhalide group and aryl; A<n-> can be ClO4<->, PF6<->, SbF6<->, BF4<->, SiF6<2->, and n can be 1, 2. The invention also relates to an organic light-emitting diode, a preparation method and a purpose thereof, by taking the phosphorescent metal complex as a luminescent layer dopant, the prepared organic light-emitting diode has high performance organic electroluminescence, and can be used for panel display.

The invention relates to the field of organic electroluminescent devices, and discloses a compound containing a 1, 3-diketone ligand, application of the compound and an organic electroluminescent device. The compound has a structure as shown in Ir (LA) (LB) 2, LA has a structure as shown in a formula (IA), and LB is a structure as shown in a formula (IB), a structure as shown in LB310, a structure as shown in LB311, a structure as shown in LB312, a structure as shown in LB313 or a structure as shown in LB314. The compound containing the 1, 3-diketone ligand provided by the invention has the advantages of small synthesis difficulty and easy purification, has excellent luminescence performance when being used as an organic electrophosphorescent material, can prolong the service life of a device, can increase the solubility of the phosphorescent material, and can reduce the probability of triplet state-triplet state quenching.

The invention relates to the technical field of organic electroluminescent display, particularly discloses a novel organic electrophosphorescent light-emitting material, and also discloses an application of the novel organic electrophosphorescent light-emitting material in an organic light-emitting device. The organic electrophosphorescent light-emitting material provided by the invention has a structure as shown in a general formula (I) in the specification. The organic electrophosphorescent light-emitting material is applied to the organic light-emitting device, and the prepared light-emitting device shows excellent performances of high purity, high brightness and high efficiency.

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 field of organic electroluminescent devices, and discloses a compound containing a 1, 3-diketone ligand, application of the compound and an organic electroluminescent device. The compound has a structure as shown in Ir (LA) (LB) 2, LA has a structure as shown in a formula (IA), and LB is a structure as shown in a formula (IB), a structure as shown in LB310, a structure as shown in LB311, a structure as shown in LB312, a structure as shown in LB313 or a structure as shown in LB314. The compound containing the 1, 3-diketone ligand provided by the invention has the advantages of small synthesis difficulty and easy purification, has excellent luminescence performance when being used as an organic electrophosphorescent material, can prolong the service life of a device, can increase the solubility of the phosphorescent material, and can reduce the probability of triplet state-triplet state quenching.

The invention provides a tetradentate ring metal palladium (II) complex phosphorescent material based on 1,8-substituted carbazole and its application. The phosphorescent material of the present invention can increase the dihedral angle between the substituted carbazole ring and the pyridine ring by introducing a substituent at the 1,8-position of the carbazole in the ligand, reduce the conjugation between the two, and reduce the material The lowest unoccupied molecular orbital (LUMO) orbital energy level of the molecule increases the metal-to-ligand transition (MLCT) ratio in the excited state molecules of the material, thereby increasing the intersystem crossing rate, shortening the lifetime of the excited state, and improving the phosphorescence quantum of the material molecules efficiency. The tetradentate ring metal palladium (II) complex phosphorescent luminescent material based on 1,8-substituted carbazole of the present invention has the characteristics of short excited state lifetime, high radiation transition rate, and high phosphorescent quantum efficiency, which shows that it has great potential in the field of OLEDs. application prospects.

The invention belongs to the field of photoelectric materials and particularly relates to an organic blue light electroluminescent material with the structural formula as shown in the figure p, wherein r is a hydrogen atom, c1-c20 alkyl or c1-c20 alkoxy. The organic blue light electroluminescent material has relatively high lumo energy level and relatively low homo energy level so as to be beneficial to blue shift of light emitting wavelength of the organic blue light electroluminescent material; and the organic blue light electroluminescent material also has relatively high phosphorescent quantum efficiency as well as relatively good dissolving property and processability. The invention also provides a preparation method of the organic blue light electroluminescent material and application of the organic blue light electroluminescent material to an organic electroluminescent device.

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.

The iridium complex organic electrophosphorescent material provided by the present invention introduces a group R with large steric hindrance on the ligand, and the structural formula is as follows: in the above structural formula, R is tert-butyl or isopropyl, and X is A sulfur atom or a nitrogen atom to which a phenyl substituent is attached. The combination of R and X has four forms: or X is an S atom, R is a tert-butyl group; or X is an S atom, and R is an isopropyl group; or X is an N atom with a phenyl substituent, and R is tert-butyl; or X is an N atom with a phenyl substituent, and R is an isopropyl group. The phosphorescence material can reduce the influence of phosphorescence quenching caused by phase separation on the luminous efficiency of the device, and the phosphorescence lifetime is reduced by about one time compared with the existing similar materials.

The invention belongs to the field of photoelectric materials, and specifically relates to a blue light organic electroluminescent material. A structural formula (P) is shown in the description. In the formula, R represents alkoxy of C1-C20. The blue light organic electroluminescent material has a relatively high LUMO energy level and relatively low HOMO energy level, and is beneficial to blue shift of luminescent wavelengths of the material. The blue light organic electroluminescent material also has relatively high phosphorescence quantum efficiency, relatively good solubility and processability. The invention also provides a preparation method of the blue light organic electroluminescent material, and an application of the blue light organic electroluminescent material in an organic electroluminescent device.