45results about How to "Extended conjugate length" patented technology

Polymers which can be used in p-type materials for organic electronic devices and photovoltaic cells. Compounds, monomers, dimers, trimers, and polymers comprising:Good photovoltaic efficiency and lifetime can be achieved. The R group can provide solubility, environmental stability, and fine tuning of spectroscopic and / or electronic properties. Different polymer microstructures can be prepared which encourage multiple band gaps and broad and strong absorptions. The carbonyl can interact with adjacent thiophene rings to provide backbone with rigidity, induce planarity, and reduce and / or eliminate intramolecular chain twisting defects. Polymers comprising benzodithiophene and / or benzothiadiazole structures can show particularly high performance.

The present specification provides a photoactive layer including an electron accepting material and an electron donating material, an organic photovoltaic cell including the same, and a method of manufacturing the organic photovoltaic cell, which includes treating the electron accepting material and the electron donating material by a non-solvent.

The invention discloses a thiofuran alternative copolymer with a main chain containing double bonds, whose general formula is shown at right. In the formula, R is hexyl or octyl, R1 is 2, 5-diphenyl-1, 3, 4-oxadiazole or pyridine, and n is more than or equal to 20 and less than or equal to 50. A method for preparing the thiofuran alternative copolymer with the main chain containing the double bonds in a right claim 1 has the following preparation steps of: 1. the preparation of 2, 4-divinyl-3-alkylthiophene; and 2. Heck coupled reaction. A polymer synthesized by the method introduces two electron attracting units, 1, 3, 4-oxadiazole and the pyridine to a polythiophene main chain with hole transmission as the main property, can effectively improve the electron affinity and the electron injection ability of the polymer, improve the injection balance of charges, and finally realize the aim of improving the phtoelectric efficiency of electroluminescent devices.

The invention discloses polyaryletherketone containing an indole group and a preparation method of polyaryletherketone. The polyaryletherketone is shown in formula (I). The preparation method includes the following steps: under the protection of nitrogen, adding 4-hydroxyindole, a keto-group-containing difluoro monomer, a bisphenol monomer, a salt-forming agent, a solvent and methylbenzene in a reactor; stirring the mixture evenly, and conducting heating to increase the temperature to 130-140 DEG C for reaction for 3-4 hours; distilling off methylbenzene, and then increasing the temperature to 160-190 DEG C for continuous reaction for 4-6 hours; cooling the materials obtained after the reaction to room temperature, and pouring the materials in deionized water for sedimentation; conducting suction filtration to obtain a solid product, conducting extraction with methyl alcohol, and drying the solid product obtained by suction filtration to obtain polyaryletherketone containing the indole group. The polyaryletherketone containing the indole group is good in thermal stability, relatively high in glass transition temperature, good in solubility and unique in optical property, and can be used in battery diaphragms, optoelectronic devices, electrode materials, inertial confinement fusion film targets and other fields. Please see the formula in the specification.

The invention belongs to the field of organic electronic transmission and / or cavity barrier materials in organic electroluminescence devices and particularly relates to polyarylate substituted pyridine derivates of the organic electronic transmission and / or hole-barrier material, a synthesis method thereof and use of the polyarylate substituted pyridine derivate material in manufacturing of organic electroluminescence device. In the invention, some large substitutes with a rigid structure are introduced by cellular design, so that exciplex is difficult to generate, a crystallization process is restrained, the film forming property is improved, and charge transmission performance is improved; meanwhile, the destruction of molecular coplanarity causes emission peak hypochromatic shift, so that the device performance is improved. The polyarylate substituted pyridine derivates of the invention have a structure below.

The invention discloses a benzotriazole organic small molecular photovoltaic material, a preparation method and application thereof, and belongs to the field of photoelectric materials. The compound of the present invention uses benzotriazole as the core, triphenylamine as the terminal group, and respectively uses thiophene, a single bond, C=C or C≡C as the connecting bond. The introduction of highly electronegative fluorine atoms into benzotriazole increased the initial oxidation potential of the material. Using triphenylamine as the terminal group not only enhances the electron-donating ability of the molecule and improves the hole transport performance, but also synergizes with the alkyl group on the benzotriazole to increase the solubility of the compound. The introduction of C=C into the molecule broadens the absorption range of the compound; the introduction of a single bond or C≡C can effectively reduce the HOMO energy level. The single bond or C≡C introduced in the molecule synergistically increases the VOC of the device with monofluorobenzotriazole. The PCE of the synthetic material of the invention is all higher than 1.70%, up to 4.77%, and has the potential of being a high-efficiency organic small molecule photovoltaic donor material.