57results about How to "Increase LUMO level" patented technology

An organic electroluminescence device includes an anode, an emitting layer, a blocking layer, an electron injecting layer, and a cathode in sequential order. The emitting layer includes a host and dopant. The blocking layer includes an aromatic heterocyclic derivative. A triplet energy ETb (eV) of the blocking layer is larger than a triplet energy ETh (eV) of the host. An affinity Ab (eV) of the blocking layer and an affinity Ab (eV) of the electron injecting layer satisfy a relationship of Ae−Ab<0.2.

An organic electroluminescence device including at least an anode, an emitting layer, an electron-transporting region and a cathode in sequential order, wherein the emitting layer contains a host and a dopant which gives fluorescent emission of which the main peak wavelength is 550 nm or less; the affinity Ad of the dopant is equal to or larger than the affinity Ah of the host; the triplet energy ETd of the dopant is larger than the triplet energy ETb of the host; and a blocking layer is provided within the electron-transporting region such that it is adjacent to the emitting layer, and the triplet energy ETb of the blocking layer is larger than ETh.

An organic electroluminescence device including at least an anode, an emitting layer, an electron-transporting region and a cathode in sequential order, wherein the emitting layer contains a host and a dopant which gives fluorescent emission of which the main peak wavelength is 550 nm or less; the affinity Ad of the dopant is equal to or larger than the affinity Ah of the host; the triplet energy ETd of the dopant is larger than the triplet energy ETh of the host; and a blocking layer is provided within the electron-transporting region such that it is adjacent to the emitting layer, and the triplet energy ETb of the blocking layer is larger than ETh.

The invention discloses a cathode injection material, and a manufacturing method and an application thereof. The cathode injection material comprises nano-titanium dioxide and a cesium salt doped mutually. The manufacturing method comprises the following steps of: preparing a nano-titanium dioxide solution and a cesium salt solution respectively; mixing a nano-titanium dioxide solution dispersion system with the cesium salt solution to obtain a mixed solution; and coating the mixed solution onto a conductive substrate in a spinning way, and heating and drying to obtain the cathode injection material. The cathode injection material disclosed by the invention has the advantages of low cost, capability of effectively enhancing the input and the transmission of charges, increase in the LUMO energy level of a cathode when applied to an organic electroluminescent device, matching with the energy level of an organic electroluminescent structure, reduction in a potential barrier between the cathode injection material and the organic electroluminescent structure, more suitability for electron injection, increase in the electron injection efficiency, preferable increase in the light extraction capability of the organic electroluminescent device, high luminance and long service life. The manufacturing method of the cathode injection material has a simple procedure and high production efficiency.

The invention discloses a high-efficiency ternary organic solar cell based on a non-fullerene receptor alloy, which comprises a substrate, an anode, an anode modification layer, an active layer, a cathode modification layer and a cathode, and is characterized in that the active layer is a polymer donor PM6 and non-fullerene receptor alloy blended film; and the non-fullerene receptor alloy is a Y6:BTP-M alloy formed by mixing two non-fullerene receptors Y6 and BTP-M according to a certain proportion. By using the higher energy level and weaker crystallinity of BTP-M relative to Y6, the Y6: BTP-M alloy optimizes the energy level and morphology of the active layer at the same time, so that the PM6: Y6: BTP-M ternary organic solar cell obtains higher voltage and current than a PM6: Y6 binarycell; and finally, the highest energy conversion efficiency (PCE = 17.03%) of the existing single-junction organic solar cell is realized. Besides, the performance of the ternary organic solar cell isnot sensitive to the thickness of the active layer, and the PCE is 14% or above when the thickness of the active layer is 120-300 nm.

The invention discloses a compound with thiophene / selenophene acene fused perylene bisimide as a skeleton. A synthesis method is simple and easy to operate, and is suitable for wide application. The thiophene / selenophene acene fused perylene bisimide derivative can be used as a receptor material for preparing organic solar cell devices, has high efficiency and high open circuit voltage, and can be widely applied in the field of organic solar cells.

The embodiment of the invention relates to an A-A type conjugated polymer based on isoindigo-blue and a preparation method and application thereof.The structural general formula of the A-A type conjugated polymer based on isoindigo-blue is shown in the description, wherein Ar is an aromatic compound fragment, and R is alkane of C1-C32, alkenyl of C2-C32 and alkyne or ether oxygen or alkyl chain amines or sulfydryl of C2-C32; n is an integer larger than or equal to 4 and smaller than or equal to 100.According to the A-A type conjugated polymer based on isoindigo-blue, the solubility is good, the light absorbance is strong, the absorption range is wide, the sunshine utilization rate is high, the LUMO energy level is low, the A-A type conjugated polymer can replace fullerene and derivatives thereof as an acceptor material for preparing a full-polymer organic light detector and an organic solar cell.

Electro luminescent metal, e.g. Ir, complexes are disclosed. The metal complexes comprise at least one ligand L1 and at least one ligand L2, wherein ligand L1 is a 2-phenylpyridine ligand (I), comprising a phenyl ring (A) and a pyridine ring (B). The integers 2 to 9 denote positions in which substitutions can be made, and by the use of different substituents, e.g. 2,4-difluoro and 7-N(CH3)2, the emission wavelength of the complex may be tuned. The ligand L2 may e.g. be a compound of the following formula (II).

The invention provides an organic electroluminescent material, a preparation method of the organic electroluminescent material and an organic electroluminescent device. The organic electroluminescent material has a general formula (P) as shown in the specification, wherein R1 is hydrogen atom, C1-20 linear alkyl, C1-20 branched alkyl, C1-20 linear alkoxy or C1-20 branched alkoxy. According to the organic electroluminescent material, 2-(2',4'-difluoro-3'-cyanophenyl) pyrimidine serving as a cyclometalated ligand and acetylacetone serving as an auxiliary ligand are adopted to synthesize a blue-light organic electroluminescent material iridium complex, and the illuminating color of the material is adjusted through chemical modification performed by introducing alkyl chain on the pyrimidine ring of the cyclometalated ligand, so that phosphorescence emission having blue emission wavelength and high luminescence efficiency can be obtained.

The invention discloses a pure heterogeneous fullerene bis-addition derivative and a preparation method thereof. The pure heterogeneous fullerene bis-addition derivative is of the structure shown in the formula (I), wherein A1 and A2 are selected from any one of groups shown in the description, and R1 and R2 independently represent a hydrogen atom, a halogen atom, alkenyl, alkynyl, alkyl of C1-C10, alkoxy of C1-C10, aryl, carbonyl or an ester group. The derivative has high LUMO energy level and high electronic mobility, and the energy conversion efficiency larger than 8% can be obtained when the pure heterogeneous fullerene bis-addition derivative is applied to a polymer solar cell.

The invention provides an organic light-emitting device and a preparation method of the organic light-emitting device. The organic light-emitting device comprises a conductive anode substrate, a hole injection layer, a hole transfer layer, a red light emitting layer, an electron transfer layer, an electron injection layer and a cathode which are sequentially stacked, wherein the electron injection layer is made of a mixed material formed by doping stearate, villiaumite and lithium salt or cesium salt into an electron injection material, the electron injection material is 4,7-diphenyl-1,10-phenanthroline, 4,7-diphenyl-1,10-phenanthroline, aluminum 4-diphenol-2(2-methyl-8-hydroxyquinoline), aluminum 8-hydroxyquinoline, 3-(biphenyl-4-base)-5-(4-tertiary butylphenyl)-4-phenyl-4H-1,2,4-triazole, or 1,3,5-3(1-phenyl-1H-benzimidazole-2-base)benzene. The organic light-emitting device provided by the invention has excellent luminescence efficiency and luminescence property.

An organic EL device includes an anode, an emitting layer, an electron transporting zone and a cathode in this sequence, in which the electron transporting zone contains an aromatic heterocyclic derivative represented by a formula (1) below. In the formula (1), X1 to X3 are a nitrogen atom or CR1, and A is represented by a formula (2) below. In the formula (2), L1 is s single bond or a linking group, and HAr is represented by a formula (3) below. In the formula (3), Y1 is an oxygen atom, a sulfur atom or the like, and one of X11 to X18 is a carbon atom bonded to L1 by a single bond and the rest of X11 to X18 are a nitrogen atom or CR13

The invention relates to a blue phosphorescent iridium metal complex and a preparation method thereof and an organic electroluminescent device. The blue phosphorescent iridium metal complex has a structural formula as shown in the specification, wherein R is hydrogen, alkyl with the carbon atom number of 1-20 or alkoxy with the carbon atom number of 1-20. The blue phosphorescent iridium metal complex uses 2-(2 ', 6'-di (trifluoromethyl) pyridine-4 '-yl) pyrimidine as a ring metal ligand body structure, 2 ,4-di (trifluoromethyl)-5-( pyridine-2 '-yl) pyrrole as an auxiliary ligand, pyrimidinyl is conducive to enhancement of the LUMO (lowest unoccupied molecular orbital) level, pyridyl and electron withdrawing trifluoromethyl groups on the ring are conducive to the reduction of the HOMO (highest occupied molecular orbital) level, the luminescence wavelength can be effectively shifted to blue, the mulecular luminescence efficiency is improved, and trifluoromethyl and the high field strength auxiliary ligand 2 ,4-di (trifluoromethyl)-5-( pyridine-2 '-yl) pyrrole can improve the luminescent properties. The complex used in the organic electroluminescent device can improve the light emitting performance of the organic electroluminescent device.

The invention belongs to the field of photoelectric materials, and specifically relates to an organic electroluminescent material. A structural formula is shown in the description. In the formula, R represents alkyl of C1-C20. The 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 organic electroluminescent material also has relatively high phosphorescence quantum efficiency, relatively good solubility and processability. The invention also provides a preparation method of the organic electroluminescent material, and an application of the organic electroluminescent material in an organic electroluminescent device.

The invention belongs to the field of photoelectric materials, and specifically relates to an organic electroluminescent material. A structural formula is shown in the description. In the formula, R represents alkyl of C1-C20. The 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 organic electroluminescent material also has relatively high phosphorescence quantum efficiency, relatively good solubility and processability. The invention also provides a preparation method of the organic electroluminescent material, and an application of the organic electroluminescent material in an organic electroluminescent device.

The invention discloses a general formula compound with the following structure, wherein R1 is selected from C6-C30 aryl or fused ring aryl, C3-C30 heterocyclic aryl or fused ring heteroaryl; R2 and R3 are independently selected from hydrogen, C1-C12 alkyl, C1-C8 alkoxy, C6-C30 aryl or fused ring aryl, C3-C30 heterocyclic aryl or fused ring heteroaryl; M and n are each independently selected fromintegers of 1 to 4; L is selected from single bonds, or C1-C12 alkyl, C1-C8 alkoxy, C5-C30 arylene, C3-C30 heterocyclic arylene; Ar1 and Ar2 are independently selected from C6-C30 aryl or fused ring aryl respectively; Ar3 and Ar4 are independently selected from C6-C30 aryl or fused ring aryl, C3-C30 heterocyclic aryl or fused ring heteroaryl respectively. The invention also protects the organic electroluminescent device adopting the general formula compound. When the compound is used as a hole transport material in an OLED light emitting layer, the compound exhibits excellent device performance and stability.

The invention provides an organic electroluminescent material, a preparation method of the organic electroluminescent material and an organic electroluminescent device. The organic electroluminescent material has a general formula (P) as shown in the specification, wherein R1 is hydrogen atom, C1-20 linear alkyl, C1-20 branched alkyl, C1-20 linear alkoxy or C1-20 branched alkoxy; and R2 is hydrogen atom or tertiary butyl. According to the organic electroluminescent material, 2-(2',6'-difluoropyridine-3'-yl) pyrimidine serving as a cyclometalated ligand and 3-trifluoromethyl-5-(pyridine-2'-yl)pyridine or 3-trifluoromethyl-5-(4'-tert-butylpyridine-2'-yl)pyridine serving as an auxiliary ligand are adopted to synthesize a blue-light organic electroluminescent material iridium heterotropic complex, and the illuminating color of the material is adjusted through chemical modification performed by introducing alkyl or alkoxy chain on the pyrimidine ring of the cyclometalated ligand, so that phosphorescence emission having high luminescence efficiency can be obtained.

The invention belongs to the field of photoelectric materials and particularly relates to an organic blue light electrophosphorescent metal iridium complex with the structural formula as shown in the specification, wherein r is a hydrogen atom, c1-c20 alkyl or c1-c20 alkoxy. By using the organic blue light electrophosphorescent metal iridium complex, blue light emitting wavelength with relatively high light emitting efficiency can be obtained; and the organic blue light electrophosphorescent metal iridium complex 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 electrophosphorescent metal iridium complex and application of the organic blue light electrophosphorescent metal iridium complex to an organic electroluminescent device.

The invention provides an organic electroluminescent material, a preparation method of the organic electroluminescent material and an organic electroluminescent device. The organic electroluminescent material has a general formula (P) as shown in the specification, wherein R1 is hydrogen atom, C1-20 linear alkyl, C1-20 branched alkyl, C1-20 linear alkoxy or C1-20 branched alkoxy. According to the organic electroluminescent material, 2-(2',6'-difluoro-3'-yl) pyrimidine serving as a cyclometalated ligand and acetylacetone serving as an auxiliary ligand are adopted to synthesize a blue-light organic electroluminescent material iridium heterotropic complex, and the illuminating color of the material is adjusted through chemical modification performed by introducing alkyl or alkoxy chain on the pyrimidine ring of the cyclometalated ligand, so that phosphorescence emission having high luminescence efficiency can be obtained.

The invention belongs to the field of photoelectric materials and particularly relates to an organic blue light electrophosphorescent metal iridium complex with the structural formula as shown in the specification, wherein r is a hydrogen atom, c1-c20 alkyl or c1-c20 alkoxy. By using the organic blue light electrophosphorescent metal iridium complex, blue light emitting wavelength with relatively high light emitting efficiency can be obtained; and the organic blue light electrophosphorescent metal iridium complex 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 electrophosphorescent metal iridium complex and application of the organic blue light electrophosphorescent metal iridium complex to an organic electroluminescent device.

The invention relates to a blue phosphorescent iridium metal complex and a preparation method thereof and an organic electroluminescent device. The blue phosphorescent iridium metal complex has a structural formula as shown in the specification, wherein R is hydrogen, alkyl with the carbon atom number of 1-20 or alkoxy with the carbon atom number of 1-20. The blue phosphorescent iridium metal complex is a same matched-type metal iridium complexes using 2-(2 ', 4'-difluoro-3'-cyano phenyl) pyrimidine as a ring metal ligand body structure, pyrimidinyl on the ring metal ligand is conducive to enhancement of the LUMO (lowest unoccupied molecular orbital) level, electron withdrawing groups comprising difluoro groups and cyanogroup on the benzene ring are conducive to the reduction of the HOMO (highest occupied molecular orbital) level, the material luminescence wavelength can be effectively shifted to blue, and the luminescent properties can also be improved by introduction of the electron withdrawing groups comprising the fluoro groups and the cyanogroup. The complex used in the organic electroluminescent device can improve the light emitting performance of the organic electroluminescent device.

The invention provides an organic blue light electrophosphorescent metal iridium complex, a preparation method thereof and an organic electroluminescent device. The organic blue light electrophosphorescent metal iridium complex has the structural general formula as shown in the specification, wherein r is a hydrogen atom, c1-c20 alkyl or c1-c20 alkoxy. The organic blue light electrophosphorescent metal iridium complex is synthesized by taking 2-(3', 5'-difluoro-4'-trifluoromethylphenyl)pyridine as a cyclometalated ligand and 3-trifluoromethyl-5-(2'-pyridyl)-1, 2, 4-triazole as an auxiliary ligand, and the color of light emitted by the organic blue light electrophosphorescent metal iridium complex is regulated through chemical modification on an alkyl chain or an alkoxy chain introduced to a pyrimidine ring of the cyclometalated ligand, so that blue light with high color purity is obtained.

The invention relates to the technical field of lithium batteries, discloses an electrolyte additive, and discloses an electrolyte containing the electrolyte additive and a lithium ion battery. The electrolyte additive has a high occupied molecular orbital (HOMO) energy level, a CEI film is formed on the surface of a positive electrode, an electrolyte can be separated from the positive electrode,and corrosion of HF to the positive electrode is reduced. The electrolyte and the lithium ion battery can tolerate higher voltage, and have good cycle performance and safety performance under high voltage.

The invention discloses a three-body fullerene derivative and its preparation method and application, which include a benzene-substituted methylene fullerene hydrophobic group, a benzene with an electron-withdrawing group connected through a flexible spacer group Vinyl cyanide, and a flexible functional group trisubstituted by benzene ring; does not form large-scale aggregation, and has excellent thermal stability. The active layer prepared by the fullerene derivatives of the present invention can not only form a long-range ordered fiber structure for the donor, but also effectively crystallize the acceptor, and finally obtain an ideal microstructure with nanoscale phase separation and double continuous transport channels; triplet The fullerene itself introduces an electron-withdrawing group, which improves the LUMO energy level and is beneficial to the improvement of the open circuit voltage of the device; the combination of the two advantages greatly improves the photoelectric conversion efficiency of the solar cell and simplifies the preparation of the device. At the same time, thermally stable active layer and device performance can be obtained, eliminating the risk of easy oxidation and degradation of the device in post-processing.

The invention relates to a high-temperature sodium ion battery electrolyte, a functional additive and a sodium ion battery. The high-temperature sodium-ion battery electrolyte comprises a bis (trifluoromethyl) functional additive and sodium salt, the bis (trifluoromethyl) functional additive is a functional additive containing a bis (trifluoromethyl) compound, the chemical formula of the bis (trifluoromethyl) compound is shown in the specification, and R1, R2, R3, R4, R5 and R6 are respectively selected from any one of alkane, alkoxy, aryl or heteroaryl; the double trifluoromethyl functional additive and Na < + > in the high-temperature sodium-ion battery electrolyte form an F-containing interfacial film on the surfaces of the positive electrode and the negative electrode of the sodium-ion battery; wherein the range of the high temperature is not lower than 40 DEG C. The electrolyte forms interface films on the surfaces of the positive electrode and the negative electrode, so that the dissolution of organic components in the interface films at high temperature can be effectively improved, the continuous decomposition of the electrolyte on the interface is reduced, and the high-temperature cycle performance of the battery is improved.

The invention relates to a blue phosphorescence material iridium metal complex, its preparation method and an organic electroluminescent device. The blue phosphorescence iridium metal complex has a structural formula which is as defined in the specification, wherein R is hydrogen or an alkyl group with carbon atom number being 1-20. By the use of the above blue phosphorescence iridium metal complex, electroluminescent performance of the organic electroluminescent device can be raised.

The invention provides an electron injection material, a preparation method and an application, which are suitable for the technical field of solar energy. The electron injection material comprises cesium salt and zinc oxide which are mutually doped, wherein the mass ratio of the zinc oxide to the cesium salt is (1-6):1. According to the electron injection material, disclosed by the invention, the cesium salt and the zinc oxide are doped, thus the LUMO (Lowest Unoccupied Molecular Orbital) energy level of an electron injection layer is improved, the potential barriers of the electron injection material and an active layer are reduced, and the electron injection efficiency is largely increased. The preparation method disclosed by the invention has the advantages of simpleness for operation and low device requirements, and is suitable for industrial application.

The invention provides an organic electro-phosphorescent material and a preparation method thereof, and an organic electroluminescent device. The invention provides the organic electro-phosphorescent material with the general formula (P), wherein R is C1-C20 straight-chain or branched-chain alkyl, or hydrogen atom. The organic electro-phosphorescent material (P) is an iridium metal complex synthesized with 2-(2',4'-difluoro-3'-cyanophenyl)pyrimidine as a cyclo-metal ligand and with 2,4-bis(trifluoromethyl)-5-(pyridin-2'-yl)pyrrole as a subsidiary ligand. According to the organic electro-phosphorescent material (P), the adjustment upon material luminescent colors is realized through introducing alkyl chain chemical modification to the pyrimidine ring of the cyclo-metal ligand, such that high-luminous-efficiency blue phosphorescent emission is obtained.

The invention discloses a high-efficiency organic solar cell based on poly(3-hexylthiophene), which comprises a substrate, a cathode, a cathode modification layer, an active layer, an anode modification layer and an anode, wherein the active layer is an electron donor and A blend film of electron acceptor, the electron donor is poly(3‑hexylthiophene) (P3HT), and the electron acceptor is the non-fullerene acceptor DFPCBR. Utilizing the large π-conjugated system and strong electron-donating properties of the central unit, DFPCBR has high HOMO energy levels and LUMO energy levels, which form a good match with the energy levels of P3HT, suppressing energy loss, and making solar cells have higher open circuit voltage. At the same time, the intramolecular charge transfer (ICT) of DFPCBR is enhanced, which narrows the band gap and broadens the absorption spectrum. Therefore, the organic solar cell prepared by the invention obtains a relatively high power conversion efficiency (PCE), the highest being 5.34%. At the same time, the organic solar cell prepared by the invention can still maintain a high PCE even when the active layer is relatively thick, which is beneficial to future practical applications.

The invention belongs to the field of photoelectric materials, and in particular relates to a blue ray organic electroluminescent material with the structural formula shown as P, wherein R is hydrogen atom or C1-C20 alkyl. The blue ray organic electroluminescent material has higher LUMO (lowest unoccupied molecular orbital) energy level and lower HOMO (highest occupied molecular orbital) energy level, is conducive to blue shift of material luminescent wavelength, and also has higher phosphorescence quantum efficiency and better dissolution properties and processing properties. The invention also provides a preparation method of the blue ray organic electroluminescent material and application of the blue ray organic electroluminescent material in organic electroluminescent devices.