110results about How to "Balanced transmission" patented technology

An electrical connector (100) has a first end for fitting with another connector and a second end for connecting to a board. The connector comprises an insulative housing (1), a number of contacts (2) and a metal shield (3) enclosing the insulative housing. The insulative housing includes a tongue plate (11) with a number of passageways (110) defined therein for receiving the contacts. The contacts are arranged side by side in the first end and arranged in three parallel rows in the second end. The contacts include signal contact pairs (21) and grounding contacts (22) disposed adjacent to and separating the signal contact pairs. Each signal contact pair includes a first signal contact and a second signal contact being substantially in equal length of the first signal contact. The signal contact pairs have matched impedance for transmitting high-speed signals, thereby canceling any cross talk therebetween.

The invention relates to the technical field of lithium ion batteries, in particular to a lithium iron phosphate battery positive electrode active material capable of reducing the polarization effectof the lithium iron phosphate battery and improving the electrochemical (rate capacity) of the lithium iron phosphate battery as well as a preparation method and application. The active material is divided into two layers, i.e. a first layer of active material and a second layer of active material coating the surface of the first layer of active material; the first layer of active material is prepared from the following components in parts by weight: 80 to 95 parts of lithium iron phosphate positive electrode material, 3 to 12 parts of conducting agent, 3 to 10 parts of category-I binder; andthe second layer of active material is prepared from the following components in parts by weight: 85 to 98 parts of lithium iron phosphate positive electrode material, 1 to 8 pars of conducting agent,and 5 to 8 parts of category-II binder. The battery polarization of a double-layer lithium iron phosphate positive electrode material pole piece prepared by adopting the modification method disclosedby the invention is greatly reduced compared to that of the ordinary lithium iron phosphate pole piece containing the same conducting agent, so that the rate capacity of the lithium iron phosphate isapparently improved. Meanwhile, the circulating performance of the product is excellent.

The invention provides a blue-ray fluorescent organic light emitting diode and a manufacturing method thereof, belongs to the technical field of organic semiconductors and solves the problems that the working voltage of a device is boosted, and the power efficiency is decreased because carrier transporting materials and blue-ray fluorescent dyes which are used in the conventional blue-ray fluorescent organic light emitting diode are not matched. The diode comprises a substrate, a first electrode, a light emitting unit and a second electrode, wherein the substrate, the first electrode, the light emitting unit and the second electrode are connected in sequence; the light emitting unit comprises a light emitting layer; and the light emitting layer consists of an organic mixture which is formed by doping the blue-ray fluorescent dyes with a mixed bipolar main body consisting of a hole-transporting blue-ray main material and an electron-transporting blue-ray main material. According to the blue-ray fluorescent organic light emitting diode, the turn-on voltage is 2.4V, the brightness is 1,000cd/m<2> when the voltage is 3.7V, the maximum current efficiency is 16.3cd/A, and the maximum power efficiency is 151m/W.

The invention relates to a triazine compound. The structural formula of the triazine compound is as shown in formula I, wherein L is substituted or non-substituted C6-C24 arylidene; n is 0 or 1; Py is substituted or non-substituted C3-C24 nitrogen-containing heterocyclic groups or nitrogen-containing heterocyclic condensation groups; Ac1 and Ac2 are substituted or non-substituted C12-C48 nitrogen-containing heterocyclic condensation groups; Ac1 and Ac2 can be identical ort different. The invention further relates to a light-emitting device containing the triazine compound. When two nitrogen-containing heterocyclic condensation groups are connected with a triazine group, certain angles are formed between the nitrogen-containing heterocyclic condensation groups and the triazine group due to steric hindrance, and TADF design is achieved.

The invention discloses triazine compound. As an aromatic amine radical group with hole transport capacity and a triazine and pyridine radical group with electron transport capacity are introduced into the triazine compound at the same time, the triazine compound can be used to balance carrier transport, further reduce driving voltage, improve luminous efficiency and prolongs the service life of a luminescent device. The invention further provides the luminescent device using the triazine compound.

The invention relates to a fluorescent blue light guest material and its preparation method and use and especially relates to a triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material and its preparation method and use. The triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material solves the problem that because of large difference of an electron donor and an acceptor, when the electron donor is increased, guest emission wavelength produces red shift so that stable and efficient blue guest luminescence cannot be realized. The blue light guest material has a structural formula shown in the description. The preparation method comprises 1, preparing PXZPhBr, PXZPhBr, PTZPhBr and DMACPhBr, 2, mixing the products obtained through the step 1 and tetrahydrofuran, adding n-butyllithium and diphenylphosphinous chloride into the mixture, adding hydrogen peroxide into the mixture, carrying out stirring and carrying out chromatography and recrystallization. The triphenyl phosphorus oxide-based thermal excitation delayed fluorescent blue light guest material is used for preparation of a thermal excitation delayed fluorescent electroluminescent device. The material utilizes short-axis modification strategy, effectively keeps a matrix triplet state energy level, has a donor-acceptor (D-A)-type molecular structure and balances carrier injection and transmission. The preparation method belongs to the field of fluorescent material preparation.

The embodiment of the invention provides a full-pure embedded load flow method and device for a three-phase active power distribution network, and the method comprises the steps: building a three-phase active power distribution network model which comprises a three-phase bus and a calculation node; under a network constraint condition, carrying out load flow calculation on the three-phase bus andthe calculation node to obtain power; if the power convergence is judged and known according to the convergence criterion value, judging whether a stepping voltage regulator exceeds a voltage limit ornot; and if it is judged and known that the stepping voltage regulator does not exceed the voltage limit, obtaining a load flow calculation result. According to the invention, the power flow under different scales of loads can be calculated at the same time, so that the voltage stability is improved, and the transmission network is balanced.

The invention discloses a compound and an organic electroluminescent device. The structural formula of the compound is shown as a formula 1 in the specification. In the formula, Z1 to Z3 are the sameor different and are each independently selected from CH and N, and Z1 to Z3 are not CH at the same time; Ar1 is a phenyl or deuterated phenyl group; Y is O; and Ar2 is a C1-C4 linear or branched alkyl group, a C1-C4 deuterated linear or branched alkyl group, a C3-C10 cycloalkyl group, a C3-C10 deuterated cycloalkyl group, a C3-C6 cycloalkenyl group, a C3-C6 deuterated cycloalkenyl group, a phenylgroup, a naphthyl group, an anthryl group, a phenanthryl group, a deuterated phenyl group, a deuterated naphthyl group, a deuterated anthrylgroup, or a deuterated phenanthryl group. The compound of the invention is used as a host material of a luminescent layer to the organic electroluminescent device; and the service life of the prepared organic electroluminescent device is greatly prolonged, sothe organic electroluminescent material has very wide application prospects.

The invention discloses a red organic fluorescence material containing a benzothiadiazole derivative, namely 4,7-bis(10-(4-(tert-butyl) phenyl)-10H-phenothiazine-3-yl) diazosulfide as well as a preparation method and application of the red organic fluorescence material, and belongs to the technical field of organic optoelectronic materials. The red organic fluorescence material is characterized inthat 10-(4-(tert-butyl) phenyl) phenothiazine is used as a donor, and 10-(4-(tert-butyl) phenyl) phenothiazine with a D-A-D structure is obtained by a phenothiazine 3rd-bit bridging mode of benzothiadiazole; due to peculiar properties of a tert-butyl phenyl group, the dissolving processing performance and electronic transmission performance of a derivative compound donor material are improved, carrier support is more balanced in transportation and the luminous efficiency is improved; the prepared compound has high thermal stability and chemical stability and proper energy level, and can be applied to the field of organic electroluminescence as a red light material; and a prepared organic electroluminescence device has the characteristics of lower drive voltage, higher current efficiency,external quantum efficiency and the like and obtains higher electroluminescence.

The invention discloses a triphenylamine substituted-vinyl modified phenanthroimidazole compound, a preparation method thereof and an application of the compound as an electroluminescent device. The structural general formula of the compound is shown in a formula (I), wherein R is hydrogen or phenyl. According to the invention, excellent characteristics of phenanthroimidazole materials and triphenylamine substituted-vinyl are adopted, meanwhile, a donor and a receptor are connected through the vinyl, and the pi electron ionization region can be effectively improved, so that carrier injection and transmission are more balanced, then fluorescence quantum efficiency is improved, and high-fluorescence quantum efficiency of a solid-state thin film under an aggregation state is achieved; and meanwhile, blue-green light can be efficiently emitted in an organic solvent, and organic luminescent small molecules with good carrier transmission capability and high fluorescence quantum yield under aaggregation state are synthesized. The compound provided by the invention can be used as a luminescent material to be widely applied to organic luminescent devices, in particular to the stable and efficient organic electroluminescent devices.

The invention provides a polymer/inorganic nano-crystal hybrid solar cell and a manufacture method thereof. P type inorganic nano-crystal cuprous oxide is induced to be taken as a cavity-collecting layer. The cuprous oxide nano-crystal improves ITO surface work function, enhances open circuit voltage, and improves the energy conversion efficiency of the solar cell. Compared with the cell which takes the traditional poly (3, 4-ring dioxide ethylthiophene): polystyrene sulfonate as a cavity transportation layer, the cell which takes the cuprous oxide as the cavity-collecting layer improves the open circuit voltage by 32.5%, short-circuit current by 49% and energy conversion efficiency by 171%; and compared with the cell which not use the cavity transportation layer, the device which takes the cuprous oxide as the cavity-collecting layer improves the open circuit voltage by 55.9%, short-circuit current by 57.2% and energy conversion efficiency by 222%.

The invention provides a reactive power partition method based on reactive power source-charge numbers and community mining and belongs to the technical field of power system automation. Basic parameters are input through programs by means of a computer, then a power system reactive equivalent lossless network is determined, then reactive power, reactive source-charge numbers and reactive coupling modularity of all power transmission routes in a power system are determined, the optimal reactive voltage partition of the power system is determined by means of the traditional genetic algorithm, and finally the partition reactive coupling degree and the reactive balance degree of the optimal partition scheme are inspected. The method has the advantages that in the reactive voltage partition process, influences of reactive power output by a reactive power source on reactive loads through the transmission routes between reactive source-load node pairs are taken into consideration, reactive coupling performance of reactive source-load nodes in partitions can be strong, reactive coupling performance of the reactive source-load nodes between the partitions can be weak, and on the basis that reactive balance in the partitions is guaranteed, global optimality of the partitions is ensured from the perspective of reactive transmission. The method can be widely used in the reactive voltage partitions of the power system and provides scientific bases for reactive voltage control of the power system.

The invention discloses a triazine compound containing a fluorine structure, and organic light-emitting devices thereof, and belongs to the technical field of organic photoelectric material. On one hand, triazine group is a typical strong electrondrawing group, so that the compounds taking triazine groups as center structures are high in electron mobility and low in energy level; connection with pyridine groups is adopted, the compound electron mobility is increased obviously; on the other hand, the triazine group is of a three dimensional structure, is capable of preventing intermolecular aggregation effectively, and inhibiting crystallization; the easy modification performance and the high rigidity of triazine groups are capable of stabilizing compound structures; and at last, the compound structure contains an extensible three dimensional structure, the continuous pi conjugated system is capable of achieving relatively electron fluidity, so that the electron mobility is relatively high; combination of the above advantages is capable of realizing transmission balance of charge carriers. The triazine compound containing a fluorine structure is applied in the organic light-emittingdevices as electron transmission layers or cavity barrier layers, so that the organic light-emitting devices are low in driving voltage and high in light emitting efficiency.

The invention relates to a boron-based organic electroluminescent material as well as a preparation method and application thereof. According to the boron-based organic electroluminescent material, due to the fact that the rigid conjugated dibenzo polycyclic ring serves as the center, boron-based modification is carried out on the basis, the material has blue light emission shown due to the weak acceptor property of a boron-containing material and stability endowed by the dibenzo polycyclic ring, and compared with common materials and other materials constructed based on boron groups in the prior art, the material has remarkable advantages in starting voltage, luminous efficiency, light color and service life, and is an ideal blue luminescent material.

The invention discloses a compound represented by a general formula (1), wherein Z is S or O, X<1>-X<10> are respectively and independently selected from CR<3> and N, X<9> and X<10> can be connected by a single bond or not, R<1> and R<2> are respectively and independently selected from one of hydrogen, C1-C12 alkyl, C6-C30 aryl and C3-C30 heteroaryl, R<3> is selected from hydrogen, C1-C12 alkyl, C6-C30 aryl and C3-C30 heteroaryl, L<1> and L<2> are respectively and independently selected from one of a single bond, C6-C30 aryl and C3-C30 heteroaryl, Ar<1> is selected from substituted or unsubstituted imidazole groups, and Ar<2> is selected from one of C6-C30 aryl and C3-C30 heteroaryl. When the compound is used as a luminescent material in an OLED device or an electron transport material, the compound shows excellent device performance and stability. The invention also discloses an organic light-emitting device adopting the compound represented by the general formula.

The invention relates to a pyrene and imidazole derivative and a preparation method and application thereof. The bridging mode of C2 atom and N1 atom of an imidazole group is changed to form the pyrene and imidazole derivative with the structural formula as shown in (A), the pyrene and imidazole derivative is a novel blue-light emitting material, and owing to introduction of the imidazole group, the level structure and the electron transmission performance of the pyrene and imidazole derivative can be regulated. The pyrene and imidazole derivative can serve as an organic electroluminescent material to prepare an organic electroluminescent device, and the prepared device has the characteristics of high efficiency, low driving voltage and the like.

The invention discloses a bipolar small molecular light-emitting material based on an aromatic heterocyclo-2-S,S-dioxydibenzothiophene unit, and a preparation method and application thereof. The preparation method comprises the following step: performing Suzuki coupling reaction on an aromatic heterocyclo-2-S,S-dioxydibenzothiophene monomer and a borate monomer containing an Ar structure to obtain the bipolar small molecular light-emitting material based on an aromatic heterocyclo-2-S,S-dioxydibenzothiophene unit. The bipolar small molecular light-emitting material disclosed by the invention has solubility, film forming property and film morphology stability, also has favorable electron and hole transmission performance, and can balance carrier injection and transmission to realize effective compounding of more excitons; a light-emitting layer based on the material can avoid the phenomenon of mixing with a hole/electron transmission layer interface, thereby improving the light-emitting efficiency of a device; and the light-emitting layer based on the material dose not need to be subjected to annealing treatment during preparation of the electroluminescent device, thereby ensuring that the preparation process is simple.

The invention relates to the technical field of organic electroluminescence and discloses a triazine compound and an organic light-emitting device comprising the same. On the one hand, a triazine group is stable in structure, high in glass transition temperature and electron mobility and low energy level, by bonding of the triazine group with a carbazole group especially through a benzene ring ora biphenyl ring, a conjugated system is increased, and a continuous pi conjugated system brings high electron mobility, so that high electron migration rate is achieved. In addition, due to bonding ofthe triazine group with the carbazole group, carrier transport balance is realized. By application of the triazine compound to the organic light-emitting device to serve as an electron transport layer or a hole barrier layer, and the device has advantages of low driving voltage and high light emitting efficiency and is superior to existing common OLED devices.

The invention provides an organic electroluminescence material containing a phenanthrene structure and an organic luminescence device thereof, and belongs to the technical field of organic photoelectric materials. The structure of the organic electroluminescence material containing the phenanthrene structure contains the phenanthrene ring structure, wherein the phenanthrene ring structure is a blue ray structure which is excellent in performance and has a higher triplet state energy level and a wider energy gap, and in molecules, through connection with benzimidazole groups, the electron transportation capability of the blue ray main structure is enhanced, so that carrier transportation is balanced. Compared with the prior art, the material has the advantages that the material is applied to the organic luminescence device and especially used as the blue luminescence material in a luminescence layer, the luminescence efficiency is relatively high, and the driving voltage is relatively low.

The invention provides an organic light-emitting device, and relates to the technical field of organic photo-electricity. According to the organic light-emitting device, a hole transport layer comprises a first compound represented by the formula (1), and an electron transport layer comprises a second compound represented by the formula (2); the first compound is a compound in which an aromatic amine structure is compounded with fluorene groups, and has a ductile conjugated system to acquire better carrier transport properties; the second compound is a compound in which triazine groups are compounded with the fluorene groups, a conjugated system is added, the second compound has a stretchable three-dimensional structure, and the continuous Pi-conjugated system brings about high electron mobility, so that high electron mobility is realized; carrier transport is balanced through combination between the first compound and the second compound. The organic light-emitting device has the advantages that the first compound and the second compound are applied to the organic light-emitting device to balance the electron and hole transport rates, the generation rate and the utilization rateof excitons in a light-emitting layer are increased, the turn-on voltage of the device is lowered, and the light-emitting efficiency of the device is improved.

The invention discloses a method for improving the performance of a CsPbBr3 perovskite QLED through polymer compounding. According to the method, a polymer is introduced into synthesis of CsPbBr3 perovskite quantum dots, wherein PbBr2 and TOAB are dissolved in toluene to form a lead precursor, the lead precursor is blended with a toluene solution of a polymer, a Cs precursor is injected into a blended solution of a Pb precursor and the polymer, a toluene solution of DDAB is added after a reaction is performed, finally purifying is performed to obtain quantum dots, and a QLED is constructed byusing the quantum dots as a light emitting layer. According to the invention, the polymer is added into the precursor to balance carrier transmission, so that the performance of the QLED device is effectively improved.