CN103881061B - A kind of bipolarity multipolymer Blue-light emitting host material and preparation method thereof and organic electroluminescence device - Google Patents
A kind of bipolarity multipolymer Blue-light emitting host material and preparation method thereof and organic electroluminescence device Download PDFInfo
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Abstract
The invention provides a kind of bipolarity multipolymer Blue-light emitting host material and preparation method thereof and organic electroluminescence device, described bipolarity multipolymer Blue-light emitting host material is the compound P shown in following structural formula, in formula, and R
1, R
2be C independently
1~ C
20alkyl, n is the integer between 10 ~ 100, bipolarity multipolymer Blue-light emitting host material of the present invention not only the thiodiphenylamine unit containing hole transport performance but also the also two oxazole unit of the benzene containing electronic transmission performance, achieve the carrier balance of electroluminescent device, thus solve organic electroluminescence device low efficiency problem, and bipolarity multipolymer Blue-light emitting host material Heat stability is good provided by the invention, solubility property and film forming properties excellent, be applicable to and prepare organic electroluminescence device.
Description
Technical field
The present invention relates to luminous organic material field, particularly relate to a kind of bipolarity multipolymer Blue-light emitting host material and preparation method thereof and organic electroluminescence device.
Background technology
Prepared with Alq by evaporation coating method from people's reported first such as Kodak C.W.Tang in 1987
3since bi-layer devices structure for luminescent material, organic electroluminescent just obtains the very big concern of people.Organic electroluminescent can be divided into fluorescence and phosphorescence electroluminescent.Electroluminescent due to phosphor material can utilize the energy of whole exciton, thus has larger superiority.Mostly adopt Subjective and Objective structure in present electrophosphorescence device, at present, the material of main part in electroluminescent device mainly contains small molecule host material and polymer host material two class.
Small molecule host material doping phosphorescent complexes is utilized to prepare many efficient electroluminescent devices as luminescent layer.But prepare small molecule electroluminescent device and need to adopt the complicated technology such as vacuum evaporation, substantially increase preparation cost.Meanwhile, small molecules itself is easy to the stability that the character such as crystallization also significantly limit device.In recent years, the polymer host material various phosphorescent complexes object that adulterates is utilized to prepare electroluminescent device as luminescent layer and receive more concern.Recently, also report is had about the polymer host material with bipolarity carrier transport.(the J.Phys.Chem.B.2005 such as Wu, 109,14000.) reporting a series of take polyfluorene as main chain, side chain contains the polymer host material of carbazole and oxadiazole group, with a kind of title complex of osmium for guest materials, the maximum external quantum efficiency 8.37%, high-high brightness 16720cd/m of electroluminescent device of preparation
2.But the synthesis with the polymer host material of bipolar transmission performance reported at present is relatively complicated, and preparation condition is harsher.
Summary of the invention
For solving the problem, the present invention aims to provide a kind of bipolarity multipolymer Blue-light emitting host material, this material of main part not only the thiodiphenylamine unit containing hole transport performance but also the also two oxazole unit of the benzene containing electronic transmission performance, realize the carrier balance of electroluminescent device, there is higher electroluminescent efficiency and Heat stability is good.
The present invention also aims to preparation method and organic electroluminescence device that bipolarity multipolymer Blue-light emitting host material is provided.
First aspect, the invention provides a kind of bipolarity multipolymer Blue-light emitting host material, is the compound P shown in following structural formula;
In formula, R
1, R
2be C independently
1~ C
20alkyl, n is the integer between 10 ~ 100.
R
1, R
2two alkyl chains contribute to realizing the resolvability of bipolarity multipolymer Blue-light emitting host material in specific organic solvent.
Bipolarity multipolymer Blue-light emitting host material provided by the invention not only the thiodiphenylamine unit containing hole transport performance but also the also two oxazole unit of the benzene containing electronic transmission performance, Ben Bing bis-oxazole has large plane and conjugated structure, being conducive to transferring charge, is an excellent electric transmission unit; Thiodiphenylamine is the important electroluminescent material of a class, and it has good hole transport performance, and N is upper can carry out alkyl modified, thus improves solubility property and the film forming properties of copolymerization thiodiphenylamine.Phenothiazinyl main polymer chain is introduced Ben Bing bis-oxazole, realize the carrier balance of electroluminescent device, thus solve organic electroluminescence device low efficiency problem.And bipolarity multipolymer Blue-light emitting host material thermostability provided by the invention is good, solubility property and film forming properties excellent, be applicable to and prepare organic electroluminescence device.
Second aspect, the invention provides the preparation method of bipolarity multipolymer Blue-light emitting host material, comprises following operation steps:
The compd A providing following structural formula to represent respectively and compd B:
In formula, R
1, R
2be C independently
1~ C
20alkyl.
In atmosphere of inert gases, be that described compd A and the described compd B of 1:1 ~ 1:1.2 adds containing in the organic solvent in catalyzer and alkaline solution by mol ratio, Suzuki coupling reaction is carried out 12 ~ 96 hours under 70 ~ 130 DEG C of conditions, after reaction terminates, obtain bipolarity multipolymer Blue-light emitting host material, i.e. compound P, described bipolarity multipolymer Blue-light emitting host material structural formula is as follows:
In formula, R
1, R
2be C independently
1~ C
20alkyl, n is the integer between 10 ~ 100.
Preferably, the temperature of reaction of described Suzuki coupling reaction is 90 ~ 120 DEG C.
Preferably, the reaction times of described Suzuki coupling reaction is 24 ~ 72 hours.
Preferably, described catalyzer is the mixture of organic palladium or organic palladium and organophosphorus ligand.
More preferably, described organic palladium is bis-triphenylphosphipalladium palladium dichloride, tetra-triphenylphosphine palladium, the mixture of described organic palladium and organophosphorus ligand is palladium and tri-o-tolyl phosphine mixture or three dibenzalacetone two palladiums and 2-dicyclohexyl phosphine-2 ', the mixture of 6 '-dimethoxy-biphenyl.
Preferably, the molar weight of described organophosphorus ligand is 4 ~ 8 times of organic palladium molar weight.
Preferably, the mol ratio of described organic palladium and compd A is 1:20 ~ 1:100.
Preferably, described organic solvent is toluene, DMF or tetrahydrofuran (THF).
Preferably, described alkaline solution is sodium carbonate solution, solution of potassium carbonate or sodium hydrogen carbonate solution.
Preferably, the gas in described atmosphere of inert gases is at least the one in nitrogen or argon gas.
Preferably, need carry out purification & isolation by the described bipolarity multipolymer Blue-light emitting host material obtained to Suzuki coupling reaction, described method for purifying and separating is:
After reaction terminates, methyl alcohol precipitating is added in reaction solution, methyl alcohol and normal hexane extracting is used successively after filtration, then be that solvent extraction is to colourless with chloroform, collect chloroformic solution and be spin-dried for and obtain red powder, after collection, namely obtaining described bipolarity multipolymer Blue-light emitting host material after 50 DEG C of dry 24h under vacuo.
Preparation method of the present invention is simple and ripe, and productive rate is high, mild condition, and material is cheap and easy to get.
In an embodiment, for convenience of statement, compd A uses the expressions such as compd A 1, A2, A3 respectively, the expressions such as compd B uses compound B-11 respectively, B2, B3, and name is all as the criterion with the title in each embodiment.
The third aspect, the invention provides a kind of organic electroluminescence device, comprise conductive glass, hole injection layer, luminescent layer, hole blocking layer, electron transfer layer, cathode buffer layer and negative electrode successively, luminescent layer comprises material of main part and guest materials, and described luminescent layer material of main part is the bipolarity multipolymer Blue-light emitting host material described in first aspect.
A kind of bipolarity multipolymer Blue-light emitting host material provided by the invention and preparation method thereof and organic electroluminescence device, have following beneficial effect:
Bipolarity multipolymer Blue-light emitting host material of the present invention is on phenothiazinyl main polymer chain, introduce Ben Bing bis-oxazole, achieves the carrier balance of electroluminescent device, thus solves organic electroluminescence device low efficiency problem; And bipolarity multipolymer Blue-light emitting host material Heat stability is good provided by the invention, solubility property and film forming properties excellent, be applicable to and prepare organic electroluminescence device;
Bipolarity multipolymer Blue-light emitting host material of the present invention does not have bibliographical information and related application openly at present, it is a kind of new photoelectric material, effciency of energy transfer is high, and Suzuki can be utilized to react preparation, preparation method is simple and ripe, and productive rate is high, mild condition, material is cheap and easy to get, makes its having a extensive future in field of photovoltaic materials such as organic electroluminescence devices.
Accompanying drawing explanation
Fig. 1 is the thermogravimetic analysis (TGA) figure of the bipolarity multipolymer Blue-light emitting host material of the embodiment of the present invention 1;
Fig. 2 is the structural representation using the bipolarity multipolymer Blue-light emitting host material of the embodiment of the present invention 1 as the organic electroluminescence device of luminescent layer material of main part.
Embodiment
The following stated is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
In following examples, compd A, B all commercially obtain.
Embodiment 1
A kind of bipolarity multipolymer Blue-light emitting host material, i.e. poly-{ N-normal hexane base-3,7-bis-bases-thiodiphenylamine-co-2,6-bis-normal hexane base-4,8-bis-base benzo [1,2-d; 4,5-d '] bis-oxazole }, (n=60), be designated as copolymer p 1, structural formula is as follows:
The preparation process of P1 is as follows:
Under argon shield, by N-normal hexane base-3,7-bis-tetramethyl ethylene ketone boric acid ester thiodiphenylamine A1 (107mg, 0.2mmol), 2,6-bis-normal hexane base-4,8-dibromo benzo [1,2-d; 4,5-d '] bis-oxazole B1 (97mg, 0.2mmol) add in the flask filling 10ml toluene solvant, by salt of wormwood (2mL after abundant dissolving, 2mol/L) solution joins in flask, vacuumize deoxygenation and be filled with argon gas, then adding bis-triphenylphosphipalladium palladium dichloride (5.6mg, 0.008mmol); Flask is heated to 100 DEG C and carries out Suzuki coupling reaction 48h.Stop polyreaction after cooling, drip in flask in 50ml methyl alcohol and carry out sedimentation; Methyl alcohol and normal hexane extracting 24h is used successively after being filtered by apparatus,Soxhlet's.Then be that solvent extraction is extremely colourless with chloroform, collect chloroformic solution and be spin-dried for obtain red powder, be pumped through under vacuum pump and obtain P1 product night, productive rate 76%.Reaction formula is:
Copolymer p 1 after purifying is carried out gel permeation chromatography (GPC) test, and number-average molecular weight Mn ≈ 24.7kDa, multipolymer monodispersity is 2.3.
Fig. 1 is the thermogravimetic analysis (TGA) figure of the bipolarity multipolymer Blue-light emitting host material (P1) of the embodiment of the present invention 1, thermogravimetic analysis (TGA) is completed by the measurement of Perkin-ElmerSeries7 Thermo System, and result shows the thermal weight loss temperature (T of this polymkeric substance 5%
d) be 437 DEG C, illustrate that bipolarity multipolymer Blue-light emitting host material of the present invention has extraordinary thermostability.
Embodiment 2
A kind of bipolarity multipolymer Blue-light emitting host material, i.e. poly-{ N-methyl-3,7-bis-bases-thiodiphenylamine-co-2,6-bis-NSC 62789 base-4,8-bis-base benzo [1,2-d; 4,5-d '] bis-oxazole } (n=100), be designated as copolymer p 2, structural formula is as follows:
The preparation process of P2 is as follows:
Under nitrogen and argon gas gas mixture are protected, by N-methyl-3,7-bis-tetramethyl ethylene ketone boric acid ester thiodiphenylamine A2 (140mg, 0.3mmol), 2,6-bis-NSC 62789 base-4,8-dibromo benzo [1,2-d; 4,5-d '] bis-oxazole B2 (263mg, 0.3mmol) add in the two-mouth bottle of 50mL specification with 15mL tetrahydrofuran (THF), after the gas mixture air-discharging passing into nitrogen and argon gas after abundant dissolving is about 20min, then by tetra-triphenylphosphine palladium (4mg, 0.003mmol) add wherein, after fully dissolving, add sodium bicarbonate (3mL, 2mol/L) solution again.After the gas mixture air-discharging of fully logical nitrogen and argon gas is about 10min again, two-mouth bottle is heated to 70 DEG C and carries out Suzuki coupling reaction 96h.Stop polyreaction after cooling, in two-mouth bottle, add 40mL methyl alcohol precipitating, after being filtered by apparatus,Soxhlet's, use methyl alcohol and normal hexane extracting 24h successively.Then be solvent extraction with chloroform to colourless, collect chloroformic solution and be spin-dried for and obtain red solid, after collection, obtain P2 product after 50 DEG C of dry 24h under vacuo.Productive rate is 83%, and reaction formula is:
Copolymer p 2 after purifying is carried out GPC test, number-average molecular weight Mn ≈ 61.5kDa, and multipolymer monodispersity is 1.9.
Embodiment 3
A kind of bipolarity multipolymer Blue-light emitting host material, i.e. poly-{ N-NSC 62789 base-3,7-bis-bases-thiodiphenylamine-co-2,6-diformazan alkyl-4,8-bis-base benzo [1,2-d; 4,5-d '] bis-oxazole } (n=91), be designated as copolymer p 3, structural formula is as follows:
The preparation process of P3 is as follows:
Under nitrogen protection, by N-NSC 62789 base-3,7-bis-tetramethyl ethylene ketone boric acid ester thiodiphenylamine A3 (220mg, 0.3mmol), 2,6-diformazan alkyl-4,8-dibromo benzo [1,2-d; 4,5-d '] bis-oxazole B3 (114mg, 0.33mmol), palladium (3.5mg, 0.015mmol) He three (o-methoxyphenyl) phosphine (21mg, 0.06mmol) join in the flask of the DMF filling 12mL, after fully dissolving, add salt of wormwood (3mL, 2mol/L) solution, then after in flask, logical nitrogen purge gas is about 30min; Flask is heated to 130 DEG C and carries out Suzuki coupling reaction 12h.Stop polyreaction after cooling, in flask, add 40mL methyl alcohol precipitating, after being filtered by apparatus,Soxhlet's, use methyl alcohol and normal hexane extracting 24h successively; Then be solvent extraction with chloroform to colourless, collect chloroformic solution and be spin-dried for and obtain red powder, after collection under vacuo after 50 DEG C of dry 24h, be P3 product, productive rate 74%.Reaction formula is:
Copolymer p 3 after purifying is carried out GPC test, number-average molecular weight Mn ≈ 48.6kDa, and multipolymer monodispersity is 2.0.
Embodiment 4
A kind of bipolarity multipolymer Blue-light emitting host material, i.e. poly-{ N-normal butane base-3,7-bis-bases-thiodiphenylamine-co-2,6-bis-n-decane base-4,8-bis-base benzo [1,2-d; 4,5-d '] bis-oxazole } (n=10), represent with P4:
The preparation process of P4 is as follows:
Under nitrogen protection, by N-normal butane base-3,7-bis-tetramethyl ethylene ketone boric acid ester thiodiphenylamine A4 (152mg, 0.3mmol), 2,6-bis-n-decane base-4,8-dibromo benzo [1,2-d; 4,5-d '] bis-oxazole B4 (215mg, 0.36mmol), three dibenzalacetone two palladium (9mg, 0.009mmol) with 2-dicyclohexyl phosphine-2 ', 6 '-dimethoxy-biphenyl (29mg, 0.072mmol) joins in the flask of the DMF filling 12mL, sodium bicarbonate (3mL, 2mol/L) solution is added after abundant dissolving.After in flask, logical nitrogen purge gas is about 30min again; Flask is heated to 120 DEG C and carries out Suzuki coupling reaction 24h.Stop polyreaction after cooling, in flask, add 40mL methyl alcohol precipitating, after being filtered by apparatus,Soxhlet's, use methyl alcohol and normal hexane extracting 24h successively; Then be solvent extraction with chloroform to colourless, collect chloroformic solution and be spin-dried for and obtain red powder, after collection under vacuo after 50 DEG C of dry 24h, be P4 product, productive rate is 80%.Reaction formula is:
Copolymer p 4 after purifying is carried out GPC test, number-average molecular weight Mn ≈ 26.4kDa, and multipolymer monodispersity is 2.4.
Embodiment 5
A kind of bipolarity multipolymer Blue-light emitting host material, i.e. poly-{ N-dodecyl-3,7-bis-bases-thiodiphenylamine-co-2,6-bis-octane base-4,8-bis-base benzo [1,2-d; 4,5-d '] bis-oxazole } (n=75), be designated as copolymer p 5, structural formula is as follows:
The preparation process of P5 is as follows:
Under nitrogen and argon gas gas mixture are protected, by N-dodecyl-3,7-bis-tetramethyl ethylene ketone boric acid ester thiodiphenylamine A5 (186mg, 0.3mmol), 2,6-bis-octane base-4,8-dibromo benzo [1,2-d; 4,5-d '] bis-oxazole B5 (195mg, 0.36mmol) add in the two-mouth bottle of 50mL specification with 15mL toluene, after the gas mixture air-discharging passing into nitrogen and argon gas after abundant dissolving is about 20min, then by tetra-triphenylphosphine palladium (8mg, 0.006mmol) add wherein, then add salt of wormwood (3mL, 2mol/L) solution.After the gas mixture air-discharging of fully logical nitrogen and argon gas is about 10min again, two-mouth bottle is heated to 90 DEG C and carries out Suzuki coupling reaction 60h.Stop polyreaction after cooling, in two-mouth bottle, add 40mL methyl alcohol precipitating, after being filtered by apparatus,Soxhlet's, use methyl alcohol and normal hexane extracting 24h successively.Then be solvent extraction with chloroform to colourless, collect chloroformic solution and be spin-dried for and obtain red solid, after collection, obtain P5 product after 50 DEG C of dry 24h under vacuo.Productive rate is 73%.Reaction formula is:
Copolymer p 5 after purifying is carried out GPC test, number-average molecular weight Mn ≈ 78.2kDa, and multipolymer monodispersity is 2.1.
Embodiment 6
A kind of bipolarity multipolymer Blue-light emitting host material, i.e. poly-{ N-n-octyl-3,7-bis-bases-thiodiphenylamine-co-2,6-di-n-octyl-4,8-bis-base benzo [1,2-d; 4,5-d '] bis-oxazole } (n=27), be designated as copolymer p 6, structural formula is as follows:
The preparation process of P6 is as follows:
Under nitrogen protection, by N-n-octyl-3,7-bis-tetramethyl ethylene ketone boric acid ester thiodiphenylamine A6 (169mg, 0.3mmol), 2,6-di-n-octyl-4,8-dibromo benzo [1,2-d; 4,5-d '] bis-oxazole B6 (179mg, 0.33mmol), palladium (3.5mg, 0.015mmol) He three (o-methoxyphenyl) phosphine (32mg, 0.09mmol) join in the flask of the DMF filling 12mL, after fully dissolving, add salt of wormwood (3mL, 2mol/L) solution, after in flask, logical nitrogen purge gas is about 30min; Flask is heated to 80 DEG C and carries out Suzuki coupling reaction 72h.Stop polyreaction after cooling, in flask, add 40mL methyl alcohol precipitating, after being filtered by apparatus,Soxhlet's, use methyl alcohol and normal hexane extracting 24h successively; Then be solvent extraction with chloroform to colourless, collect chloroformic solution and be spin-dried for and obtain red powder, after collection under vacuo after 50 DEG C of dry 24h, be P3 product, productive rate 77%.Reaction formula is:
Copolymer p 6 after purifying is carried out GPC test, number-average molecular weight Mn ≈ 23.6kDa, and multipolymer monodispersity is 2.4.
Embodiment 7
The bipolarity multipolymer material of main part prepared using the embodiment of the present invention is as luminescent layer material of main part, prepare organic electroluminescence device, comprise the conductive glass 1, hole injection layer 2, luminescent layer 3, hole blocking layer 4, electron transfer layer 5, cathode buffer layer 6 and the negative electrode 7 that stack gradually, its structure as shown in Figure 2, wherein conductive glass 1 (thickness is 150nm) is tin indium oxide (ITO), preferably, and the tin indium oxide of ITO to be square resistance be 10 ~ 20 Ω/, hole injection layer 2 (thickness is 30nm) adopts poly-(3, 4-ethylenedioxythiophene) matrix material of (PEDOT) and polystyrolsulfon acid (PSS), the polymkeric substance that luminescent layer 3 (thickness is 20nm) adopts the embodiment of the present invention 1 to prepare is as material of main part doping guest materials two (4, 6-difluorophenyl pyridinato-N, C2) pyridinecarboxylic closes the matrix material that iridium (III) (FIrpic) is formed, the doping massfraction of FIrpic is 15%, the material of hole blocking layer 4 (thickness is 30nm) is 2, 9-dimethyl-4, 7-phenylbenzene-1, 10-phenanthroline (BCP), the material of electron transfer layer 5 (thickness is 30nm) is three-oxine aluminium (Alq
3), the material of cathode buffer layer 6 (thickness is 1.5nm) is lithium fluoride (LiF), the aluminium lamination (thickness is 150nm) that negative electrode 7 is formed for vacuum evaporation.
The manufacturing processed of organic electroluminescence device is as follows:
Spin coating poly-(3 successively on conductive glass (ITO) substrate through cleaning, 4-ethylenedioxythiophene) matrix material of (PEDOT) and polystyrolsulfon acid (PSS), the matrix material that polymkeric substance prepared by embodiment 1 is formed as material of main part doping guest materials FIrpic, evaporation BCP, Alq successively again
3, LiF and aluminium, obtain the organic electroluminescence device using the bipolarity multipolymer material of main part of embodiment 1 preparation as luminescent layer material of main part.
Current versus brightness-the voltage characteristic of organic electroluminescence device completes by with Keithley source measuring system (Keithley2400Sourcemeter, Keithley2000Cuirrentmeter) correcting silicon photoelectric diode, and all measurements all complete in atmosphere at room temperature.The maximum current efficiency of device is 8.2cd/A, and high-high brightness is 19640cd/m
2, this device has higher luminous efficiency.
The above is the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a bipolarity multipolymer Blue-light emitting host material, is characterized in that, is the compound P shown in following structural formula;
In formula, R
1, R
2be C independently
1~ C
20alkyl, n is the integer between 10 ~ 100.
2. a preparation method for bipolarity multipolymer Blue-light emitting host material, is characterized in that, comprises following operation steps:
The compd A providing following structural formula to represent respectively and compd B:
In formula, R
1, R
2be C independently
1~ C
20alkyl;
In atmosphere of inert gases, be that described compd A and the described compd B of 1:1 ~ 1:1.2 adds containing in the organic solvent in catalyzer and alkaline solution by mol ratio, Suzuki coupling reaction is carried out 12 ~ 96 hours under 70 ~ 130 DEG C of conditions, after reaction terminates, obtain bipolarity multipolymer Blue-light emitting host material, i.e. compound P, described bipolarity multipolymer Blue-light emitting host material structural formula is as follows:
In formula, R
1, R
2be C independently
1~ C
20alkyl, n is the integer between 10 ~ 100.
3. the preparation method of bipolarity multipolymer Blue-light emitting host material as claimed in claim 2, it is characterized in that, the temperature of reaction of described Suzuki coupling reaction is 90 ~ 120 DEG C, and the described reaction times is 24 ~ 72 hours.
4. the preparation method of bipolarity multipolymer Blue-light emitting host material as claimed in claim 2, it is characterized in that, described alkaline solution is sodium carbonate solution, solution of potassium carbonate or sodium hydrogen carbonate solution.
5. the preparation method of bipolarity multipolymer Blue-light emitting host material as claimed in claim 2, it is characterized in that, described catalyzer is the mixture of organic palladium or organic palladium and organophosphorus ligand.
6. the preparation method of bipolarity multipolymer Blue-light emitting host material as claimed in claim 5, it is characterized in that, described organic palladium is bis-triphenylphosphipalladium palladium dichloride or tetra-triphenylphosphine palladium, the mixture of described organic palladium and organophosphorus ligand is palladium and tri-o-tolyl phosphine mixture or three dibenzalacetone two palladiums and 2-dicyclohexyl phosphine-2 ', the mixture of 6 '-dimethoxy-biphenyl.
7. the preparation method of bipolarity multipolymer Blue-light emitting host material as claimed in claim 6, it is characterized in that, the molar weight of described organophosphorus ligand is 4 ~ 8 times of organic palladium molar weight.
8. the preparation method of bipolarity multipolymer Blue-light emitting host material as claimed in claim 5, it is characterized in that, the mol ratio of described organic palladium and compd A is 1:20 ~ 1: 100.
9. the preparation method of bipolarity multipolymer Blue-light emitting host material as claimed in claim 2, is characterized in that, need carry out purification & isolation by the described bipolarity multipolymer Blue-light emitting host material obtained to Suzuki coupling reaction, described method for purifying and separating is:
After reaction terminates, methyl alcohol precipitating is added in reaction solution, methyl alcohol and normal hexane extracting is used successively after filtration, then be that solvent extraction is to colourless with chloroform, collect chloroformic solution and be spin-dried for and obtain red powder, after collection, namely obtaining described bipolarity multipolymer Blue-light emitting host material after 50 DEG C of dry 24h under vacuo.
10. an organic electroluminescence device, comprise conductive glass, hole injection layer, luminescent layer, hole blocking layer, electron transfer layer, cathode buffer layer and negative electrode successively, luminescent layer comprises material of main part and guest materials, it is characterized in that, described luminescent layer material of main part is bipolarity multipolymer Blue-light emitting host material according to claim 1.
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| Synthesis and electroluminescent properties of -conjugated copolymer based on 10-hexylphenothiazine and aromatic 1,2,4-triazole;Jiyoung Choi et al.;《Synthetic Metals》;20090512;第159卷(第19-20期);第1922-1927页 * |
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