78results about How to "Facilitates charge transport" patented technology

The invention relates to benzothiadiazole-based multi-arm conjugated molecules as well as a preparation method and applications thereof as an active layer material in organic semiconductor devices such as an organic light emitting diode (OLED), an organic photovoltaic (OPV) and an organic field effect transistor (OFET). The benzothiadiazole-based multi-arm conjugated small molecules in the invention have higher luminous efficiency, better sunlight capture capability and hole transmission capability, and good solution processability and thermal stability, are ideal materials for organic semiconductor devices, such as the OLED, the OPV, the OFET and the like, and have the structure as shown in the general formula disclosed in the specification.

An organic semiconductor material is characterized by indolocarbazole derivative heteroaromatic ring as the molecule structure thereof, so that the organic semiconductor material has the properties of high heat resistance, stability and high charge transmission and processing performance. Organic light-emitting diode made of the organic semiconductor material has the advantages of high efficiency, low voltage and long service lifetime.

The invention relates to a preparation method of a graphene film for a supercapacitor. The method comprises the steps of (1), washing oxidized graphite with deionized water at a room temperature, mixing with the deionized water to a suspension with a concentration of 1-5mg / ml, conducting ultrasonic for 1-3h, removing sediment in the centrifuge washing process, rotationally evaporating at 40-45 DEG C until oxidized graphite collosol is formed, and (2), placing an oxidized graphite film with a mix proportion of 1:40-120cm<2> / mL into hydrazine hydrate, reacting for 4-15h at 90-120 DEG C, and washing with the deionized water. The preparation method is simple, no conductive agent or binding agent is required, an easy-to-industrialize blade-coating film forming method is adopted, and the obtained graphene film for the supercapacitor is high in specific capacitance, good in conductivity and higher in flexibility, and has wide applications in energy storage fields such as supercapacitors and lithium ion batteries.

The invention relates to an up-conversion luminescence material, and a preparation method and an application thereof. The up-conversion luminescence material includes at least one rare earth ion doped fluoride nanoparticle, at least one transition metal ion doped semiconductor metal oxide nanoparticle and at least one polymer mainly modified on the surface of the fluoride nanoparticle and used as a connecting medium between the fluoride nanoparticle and the semiconductor metal oxide nanoparticle. The invention also discloses the preparation method of the up-conversion luminescence material. The up-conversion luminescence material has the advantages of high luminescence efficiency, good stability, high light transmittance and high charge transfer ability, can effectively improve the photon utilization rate of organic photoelectric conversion devices in the infrared region, greatly improves the charge transfer of the interfaces of the devices, and has wide application prospect in various organic photoelectric conversion devices.

The invention provides a method for preparing a perovskite film and the application of the perovskite film in a perovskite solar cell. The method comprises the steps of performing spin coating of a perovskite precursor solution on an ITO glass substrate by a one-step method at a speed of 4000 r, dropping a chlorobenzene solution with a dissolved n-type semiconductor material of a polymer side chain onto the substrate which is rotating at a high speed after the 8 seconds of spin coating, annealing at 100 DEG C for 30 min, and cooling to the room temperature to obtain the perovskite film. The structure of the perovskite solar cell comprises ITO / NiOx / PVK / PCBM / BCP / Ag from top to bottom. According to the invention, the nucleation of a perovskite crystal can be promoted, the number of grain boundaries is reduced, the grain boundary defects are passivated, and therefore, the effects of optimizing the morphology of the perovskite film and improving the performance of the device are achieved. The n-type doping can be formed to improve the conductivity of a semiconductor, the charge transfer is facilitated, the recombination is reduced, the hysteresis in battery device performance can be avoided, and the stability is effectively improved.

The present invention provides a polymer containing thienothiophene, benzothiadiazole and cyclopentadithiophene, a preparation method and an application thereof. The polymer is a polymer P having the following general formula, wherein R1 and R2 are the same or different H or C1-C12 alkyl, and n is a natural number of 5-60. According to the present invention, the three units such as thienothiophene, benzothiadiazole and cyclopentadithiophene in the polymer are combined to form the repeated unit having the acceptor-donor-acceptor-donor (A-D-A-D) form so as to enhance the charge transporting in the polymer molecule, reduce the band gap of the polymer, and expand the light absorption range of the polymer material, such that the polymer has characteristics of excellent sunlight matching property, excellent carrier mobility property and simple and controllable preparation method, and has good application prospects in the fields of polymer solar cells, organic electroluminescent devices and other optoelectronic materials. The polymer P is as the follow.

The invention discloses a synthesis method of a MoO3 self-assembled hexagonal prism. The method comprises the following steps: adding a soluble molybdenum salt into a mixed solvent of water, isopropanol and 1,3,5-trimethylbenzene, and performing stirring until uniformity; then adding a proper amount of sodium lauryl sulfate, polyether F127, polyvinylpyrrolidone K-30 and dodecylamine, and performing stirring to obtain a uniform solution; adding nitric acid to adjust the pH value, carrying out a hydrothermal reaction, and centrifuging, washing and drying the product to obtain a precursor; and carrying out heat treatment on the precursor to obtain an alpha-MoO3 material. The orthorhombic-phase plate-shaped MoO3 self-assembly hexagonal prism structure is obtained by adopting the method of combining the hydrothermal reaction with the heat treatment process. The raw materials used in the method are cheap and are easy to store, the synthesis method is simple, and the product has a special morphology and a uniform and adjustable size, and has potential application values in the fields of sensing and catalysis.

The invention relates to red phosphorescence iridium complexes, a preparing method thereof and an organic electroluminescence device. The structure formula of the red phosphorescence iridium complexes is shown in the specification, wherein -Ar is shown in the specification. The red phosphorescence iridium complexes introduce 5-acenaphthenyl into a benzodinitrogen six-membered ring, can obtain a satisfied red light emitting wavelength, and generate steric-hindrance effects to a certain degree, thus reducing direct functions of iridium atoms, reducing self-quenching phenomena of triplet excitons and having strong phosphorescence emission at room temperature. In addition, the red phosphorescence iridium complexes are respectively provided with acenaphthenyl and a benzodinitrogen six-membered ring structure that are high in planar rigidity, thus facilitating phosphorescence luminescence on the one hand, effectively controlling the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) energy levels of the materials on the other hand, and facilitating charge transfer in balancing devices. Electroluminescence properties of the organic electroluminescence device can be improved by applying the complexes into the organic electroluminescence device.

The invention discloses D-pai-A-pai-D type BODIPY (boron-dipyrromethene) derivatives based on acetenyl bridging and a preparation method of the D-pai-A-pai-D type BODIPY derivatives. The derivatives are novel and are obtained by linking acetenyl to fluorine, carbazole, triphenylamine, benzodithiophene, phenothiazine and other groups and then subjecting the groups with acetenyl to a Sonogashira coupling reaction with prepared BODIPY with bilateral iodine substitutes in 2 and 6 positions. The synthesis method of the D-pai-A-pai-D type BODIPY derivatives based on acetenyl bridging is simple, is higher in yield, has general applicability and can realize efficient synthesis, and the reaction conditions are easy to control; the D-pai-A-pai-D type BODIPY derivatives can be widely applied to the fields such as energy, life, analysis, material science and the like and are particularly suitable for serving as organic micromolecule solar cell materials and the like.

The invention discloses a solar battery comprising a first electrode, a first photosensitive layer, a second photosensitive layer, a second electrode and a lower conversion layer, which are sequentially arranged from the bottom up. The first photosensitive layer and the second photosensitive layer form an electron donor-electron acceptor heterojunction. The solar battery disclosed by the invention has high utilization ratio of a solar spectrum, the problem of the thermal effect of current carriers is overcome, and the energy conversion efficiency of the solar battery is largely increased.

There is provided an organic photoconductive material that can realize an electrophotographic photoreceptor which is not only excellent in charge transporting ability but also excellent in solubility in a solvent and compatibility with a resin and moreover, which is excellent in both electric properties and durability, and the organic photoconductive material that is useful also as a raw material compound for various types of functional materials. An asymmetric bis-hydroxyenamine compound represented by the following structural formula (1aa) is provided. The compound is allowed to be contained in a charge transporting layer or a surface protective layer of an electrophotographic photoreceptor. This leads realization of the electrophotographic photoreceptor which is excellent in electric properties and durability and can stably form an image of high quality being free of an image defect such as a black spot.

The invention relates to the technical field of organic semiconductor thin film solar cells, and particularly discloses a ternary solar cell doped with ultraviolet absorption organic molecules and a preparation method. According to the ternary solar cell doped with the ultraviolet absorption organic molecules, a substrate, an ITO transparent conductive cathode layer, a ZnO cathode buffer layer, aphotoactive layer, an anode buffer layer and a metal anode layer are sequentially arranged from bottom to top, wherein the photoactive layer is that based on a traditional PTB7: PC71BM system, a smallamount of ultraviolet absorption materials of phenyl salicylate are doped, the absorption spectrum of an active layer is greatly broadened, and the photo absorption ability of the active layer is enhanced; the morphology of the active layer is improved, the surface roughness is decreased, and the contact between the active layer and a transport layer is optimized; and meanwhile the carrier mobility of the active layer is further increased, the charge transfer in a device is promoted, the transfer efficiency of a photon-generated carrier is greatly improved, the short-circuit current is improved, and finally the performance of the whole organic solar cell is improved.

The invention discloses graphene conductive ink, a graphene conductive film and preparation methods and applications of the graphene conductive ink and the graphene conductive film. The graphene conductive ink comprises graphene, a cellulose substance and a solvent, wherein the solvent is selected from green low-boiling-point solvents, and the cellulose substance is selected from nonionic cellulose substances. The conductive ink is prepared by adopting a high-pressure microjet method. Compared with a traditional oxidation-reduction method, the graphene prepared by the method does not need to be oxidized, so that the graphene has high conductivity. The preparation route is simple and convenient in process, and continuous large-scale production can be realized; and by adjusting the concentration of ethyl cellulose, the graphene can be directly prepared into printable ink.

The invention discloses a core-shell-shaped Cu2Se (at) NiFe-LDH electrocatalyst and a preparation method and application thereof. Firstly, foamy copper is used as a substrate; Cu (OH) 2 nanowires aregrown on the surface of an alkaline medium in situ through a chemical oxidation method; the copper selenide nanowire is converted into a copper selenide nanowire in a tubular furnace by using seleniumpowder, ferronickel hydrotalcite nanosheets grow on the surface of the copper selenide nanowire by adopting an electrodeposition method, and the core-shell-shaped copper selenide and ferronickel hydrotalcite nanosheet electrocatalyst is prepraed by adopting a vapor-phase selenization and electrodeposition two-step. The obtained core-shell-shaped copper selenide and nickel-iron hydrotalcite nanosheet catalyst is in a nanowire shape, and the diameter of the catalyst is 150-250 nm; Cu2Se is used as a core, a NiFe-LDH sheet is used as a shell, and the thickness of the NiFe-LDH sheet is smaller than 10 nm; the oxygen evolution reaction, the hydrogen evolution reaction and the total water splitting catalytic activity of the nickel-iron hydrotalcite nanosheet in a 1mol / L KOH electrolyte solutionare higher than those of nickel-iron hydrotalcite nanosheets and composite materials thereof prepared by other traditional methods.

The present invention discloses a red light organic electrophosphorescence material metal iridium coordination compound having a structural formula represented by a formula (P), wherein R is methyl. The preparation method comprises that: a Suzuki coupling reaction is performed to obtain a ring metal ligand, the ring metal ligand and iridium trichloride trihydrate are subjected to a polymerization reaction in a 2-ethoxyethanol and water mixed solvent to obtain a chloro-bridge dimer, and the chloro-bridge dimer and 2,2,6,6-tetramethyl-3,5-heptanedione are subjected to a coordination reaction to obtain the red light organic electrophosphorescence material metal iridium coordination compound. The present invention further provides an organic electroluminescent device containing the metal iridium coordination compound. According to the present invention, 2,2,6,6-tetramethyl-3,5-heptanedione is added to the ring metal ligand as the auxiliary ligand so as to increase the steric hindrance effect of the metal iridium coordination compound, such that the direction effect between the metal atoms is reduced, the self-quenching phenomenon of the triplet state excitons is reduced, and the luminescence efficiency of the organic electroluminescent device is increased.

A method for producing a solid-state imaging element which has photoconversion pixels, the method including forming an impurity region of the first conduction type and a second impurity region of the second conduction type on the impurity region of the first conduction type by ion implantation by using the same mask; forming on the surface of the semiconductor substrate a transfer gate constituting the charge transfer section which extends over the second impurity region of the second conduction type; forming a charge accumulating region of the first conduction type constituting the sensor section by ion implantation; and forming a first impurity region of the second conduction type, which has a higher impurity concentration than the second impurity region of the second conduction type, by ion implantation.

There is provided an organic photoconductive material that can realize an electrophotographic photoreceptor which is not only excellent in charge transporting ability but also excellent in solubility in a solvent and compatibility with a resin and moreover, which is excellent in both electric properties and durability, and the organic photoconductive material that is useful also as a raw material compound for various types of functional materials. An asymmetric bis-hydroxyenamine compound represented by the following structural formula (1aa) is provided. The compound is allowed to be contained in a charge transporting layer or a surface protective layer of an electrophotographic photoreceptor. This leads realization of the electrophotographic photoreceptor which is excellent in electric properties and durability and can stably form an image of high quality being free of an image defect such as a black spot.

The invention discloses a benzothiadiazole unit-based A-pi-A'-pi-A type acceptor photovoltaic material, and a preparation method and an application thereof, and belongs to the field of organic photoelectric materials. The material adopts benzothiadiazole as a nucleus, adopts a nitro group and a 4-fluorophenyl group as end groups, and adopts a 2-cyano-styryl group as a pi connecting bond; and alkyl-modified thienyl groups are introduced to two sides of the benzothiadiazole unit in order to improve the solubility of the material, extend the conjugation length of a molecule and enhance the intramolecular charge transfer ability. The organic small molecular material obtains Jsc exceeding 1.0 mA cm<-2>, and has large redshifts being 34 nm and 38 nm respectively. The PCE of the material is increased from 0.1% to 1.0% and increases 10 times after replacing the nitro end group (M1) with the 4-fluorophenyl group (M2) due to the M2 having high Jsc and Voc, so the M2 material has higher potentialto be a high-efficiency non-fullerene small molecular acceptor photovoltaic material than the M1.

The invention discloses an all-inorganic composite hole transport layer with an energy level gradient and a battery, and preparation methods thereof. A layer of P-type inorganic material V2O5 is inserted between an ITO transparent electrode and a NiOx hole transport layer to construct an all-inorganic composite hole transport layer V2O5 / NiOX, and the energy level gradient is formed in the composite hole transport layer structure to enhance a built-in electric field, promote carrier transport, and reduce the non-radiative recombination probability of interface carriers.

The invention discloses a small molecule of A-D-A type indacenodithiophene nuclear terminal methyl, and a preparation method thereof. The preparation method comprises the following steps: reacting 6-methyl-3-oxo-2,3-dihydro-1H-inden-1-ylidene)malononitrile with indacenodithiophene under the protection of inert gas, and purifying by adopting column chromatography to obtain a target product. According to the invention, the skeleton plane rigidity of the indacenodithiophene core adopted by the invention is beneficial to increase of effective conjugate length and promotion of intramolecular carrier migration, and the large-volume non-coplanar side chains distributed on the two sides of the skeleton can inhibit long-range ordered accumulation, provide a quasi-three-dimensional charge transfer channel and form a receptor-donor-receptor (A-D-A) conjugated structure with an electron withdrawing group, so that spectral absorption of the material can be broadened and enhanced, and the material is applied to construction of efficient organic solar cell materials; and the conjugated small molecule provided by the invention has a narrow band gap, has good absorption in an ultraviolet and visible light range, is used as an acceptor material in an organic solar cell, and achieves good device efficiency.

The invention belongs to the organic electroluminescent material, and discloses a red organic electroluminescent material and a preparation method and application thereof. The material has a general structural formula as follows, wherein R represents phenyl, naphthyl-1-yl or naphthyl-2-yl. The red organic electroluminescent phosphorescent material provided by the invention uses 2-(triphenylamine-4'-yl)-5-aryl formyl pyridine as a main structure of a ring metal ligand, and the introduction of phenyl, naphthyl-1-yl and naphthyl-2-yl formyl realizes acquisition of satisfactory red emission wavelength; the presence of large groups such as triphenylamine, phenyl or naphthyl can produce a certain space steric effect, thereby reducing the direct interaction between metal atoms, and reducing self quenching phenomenon of triplet exciton; at the same time, aromatic groups can effectively control the energy levels of highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of the material, and facilitate the balance of charge transfer in a device, so as to improve the luminescent properties of the device.

The invention belongs to the organic electroluminescent material, and discloses a red organic electroluminescent material and a preparation method and application thereof. The material has a general structural formula as follows, wherein R represents phenyl, naphthyl-1-yl or naphthyl-2-yl. The red organic electroluminescent phosphorescent material provided by the invention uses 2-(9',9'-dimethyl fluorene-2'-yl)-5-aryl formyl pyridine as a main structure of a ring metal ligand, and the introduction of phenyl, naphthyl-1-yl and naphthyl -2-yl formyl realizes acquisition of satisfactory red emission wavelength; the presence of large groups such as triphenylamine, phenyl or naphthyl can produce a certain space steric effect, thereby reducing the direct interaction between metal atoms, and reducing self quenching phenomenon of triplet exciton; at the same time, aromatic groups can effectively control the energy levels of highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of the material, and facilitate the balance of charge transfer in a device, so as to improve the luminescent properties of the device.

The invention relates to a nondestructive blood glucose detection device for living bodies and a preparation method of the nondestructive blood glucose detection device. The device comprises a workingelectrode and a counter electrode, wherein the working electrode comprises a working electrode flexible substrate, a working electrode conducting substrate and glucose oxidase, the working electrodeconducting substrate is arranged on the working electrode flexible substrate, and the working electrode conducting substrate is loaded with the glucose oxidase; and the counter electrode comprises a counter electrode flexible substrate, a counter electrode conducting substrate and a silver / silver chloride film, the counter electrode conducting substrate is arranged on the counter electrode flexible substrate, and the counter electrode conducting substrate is plated with the silver / silver chloride film. The preparation method specifically comprises the steps of: firstly acquiring graphene / carbon nanotube composite fiber fabrics, respectively loading the two graphene / carbon nanotube composite fiber fabrics with the glucose oxidase so as to obtain the working electrode, carrying out plating by virtue of the silver / silver chloride film so as to obtain the counter electrode, and finally, placing the working electrode and the counter electrode side by side. Compared with the prior art, the nondestructive blood glucose detection device has the advantages that the change of biological blood glucose concentration can be detected by virtue of a relation, established through a two-electrode system, between simulated interstitial fluid and an instant response current, and the sensitivity is high.

The invention relates to the technical field of solar cells, in particular to a full-small-molecule organic solar cell based on a novel additive and a preparation method thereof. The full-small-molecule organic solar cell comprises a substrate, a hole transport layer, an active layer, an electron transport layer and a metal electrode, and the hole transport layer is coated with an active material to form the active layer; the active material comprises a donor, a receptor and an alcohol additive, and the chemical formula of the alcohol additive is CxH2x+2O, wherein x is 5-14. Compared with the prior art, according to the full-small-molecule organic solar cell based on the novel additive, the alcohol material is selected as the additive for the first time to be added into the active layer of the full-small-molecule organic solar cell based on a BTR: PC71BM binary system, and the alcohol material has good miscibility with main system materials BTR and PC71BM; meanwhile, hydrogen bonds can be formed with electronegative groups in a donor and an acceptor, crystallization of an original binary system material can be promoted, the morphology of an active layer can be improved, trap recombination of single molecules and double molecules can be reduced, and exciton separation and charge transfer are facilitated.

The present invention provides a polymer containing thienothiophene, benzothiadiazole and cyclopentadithiophene, a preparation method and an application thereof. The polymer is a polymer P having the following general formula, wherein R1 and R2 are the same or different H or C1-C12 alkyl, and n is a natural number of 5-60. According to the present invention, the three units such as thienothiophene, benzothiadiazole and cyclopentadithiophene in the polymer are combined to form the repeated unit having the acceptor-donor-acceptor-donor (A-D-A-D) form so as to enhance the charge transporting in the polymer molecule, reduce the band gap of the polymer, and expand the light absorption range of the polymer material, such that the polymer has characteristics of excellent sunlight matching property, excellent carrier mobility property and simple and controllable preparation method, and has good application prospects in the fields of polymer solar cells, organic electroluminescent devices and other optoelectronic materials. The polymer P is as the follow.

The invention belongs to the organic electroluminescent material, and discloses a red organic electroluminescent material and a preparation method and application thereof. The material has a general structural formula as follows, wherein R represents phenyl, naphthyl-1-yl or naphthyl-2-yl. The red organic electroluminescent phosphorescent material provided by the invention uses 2-(triphenylamine-4'-yl)-5-aryl formyl pyridine as a main structure of a ring metal ligand, and the introduction of phenyl, naphthyl-1-yl and naphthyl-2-yl formyl realizes acquisition of satisfactory red emission wavelength; the presence of large groups such as triphenylamine, phenyl or naphthyl can produce a certain space steric effect, thereby reducing the direct interaction between metal atoms, and reducing self quenching phenomenon of triplet exciton; at the same time, aromatic groups can effectively control the energy levels of highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) of the material, and facilitate the balance of charge transfer in a device, so as to improve the luminescent properties of the device.

The invention discloses a perovskite photoelectric detector based on a DNT-PH composite hole transport layer and a preparation method thereof. The photoelectric detector is used for industrial automation, aerospace, fire early warning and other devices. The invention belongs to the technical field of photoelectric detection, and the problems that a traditional hole transport layer material Spiro-OMeTAD is low in migration rate, poor in device stability and short in service life are solved. The photoelectric detector sequentially comprises a transparent substrate, a conductive cathode, an electron transport layer, a perovskite photoactive layer, a composite hole transport layer and a metal anode from bottom to top, the composite hole transport layer is of a double-layer structure, a lower-layer film is made of Spiro-OMeTAD, and an upper-layer film is made of DNT-PH small molecules. The DNT-PH has a relatively high homo energy level; the charge transfer between the hole transport layer and the electrode can be promoted; meanwhile, the recombination of carriers is inhibited in a dark state such that the photocurrent is improved, the dark current is greatly reduced, DNT-PH covers the surface of the Spiro-OMeTAD, the corrosion of water and oxygen to the device can be effectively reduced, the stability is further enhanced, and the stability and the service life of the device are greatly improved.

An organic semiconductor material is characterized in that it is composed of an indolocarbazole derivative aromatic heterocycle and its molecule has high heat resistance, stability, high charge transport and good processing performance. It is applied to make organic light-emitting diodes to obtain high efficiency, low voltage and long working life.

The invention provides a preparation method of a self-supporting bifunctional water electrolysis catalyst. A synchronous phosphorization-nitridation-vulcanization method is combined with a rapid ultraviolet-assisted growth method to prepare a low-platinum-loaded nitrogen and sulfur co-doped nickel phosphide self-supporting electrode. According to the self-supporting electrode material, an organic binder can be prevented from being used, electron transport between a catalytic active material and a conductive substrate can be improved, and the conductivity and catalytic stability of the electrode are improved. Moreover, due to heteroatom doping and surface platinum particle loading, the relatively poor intrinsic conductivity and catalytic activity of nickel phosphide can be further greatly improved. As a water electrolysis bifunctional catalyst, the catalyst can output a high current under a low voltage, and has profound significance for further realizing the industrialization of energy-saving hydrogen production. In addition, the preparation method has the advantages of being simple in equipment, easy to realize and control, good in process repeatability, stable in product quality and the like, and has a wide application prospect.

The invention relates to red phosphorescence iridium complexes, a preparing method thereof and an organic electroluminescence device. The structure formula of the red phosphorescence iridium complexes is shown in the specification, wherein -R is alkyl having a general formula of -CnH<2n+1>, alkoxy having a general formula of -OCnH<2n+1>, benzyl or phenoxyl, and the n is an integer ranging from 1 to 20. The red phosphorescence iridium complexes can obtain a satisfied red light emitting wavelength, reduce self-quenching phenomena of triplet excitons, and have strong phosphorescence emission at room temperature. The alkyl of different chain lengths and the alkoxy of different chain lengths can increase solubility of the materials in organic solvents and can control the light-emitting wavelength of the materials. The red phosphorescence iridium complexes are respectively provided with acenaphthenyl and a phthalazine ring structure that are high in planar rigidity, and the benzyl and the phenoxyl which are large groups are also introduced, thus facilitating phosphorescence luminescence, controlling the highest occupied molecular orbital and the lowest unoccupied molecular orbital energy levels of the materials, facilitating charge transfer in balancing devices, and improving electroluminescence properties of the device.