CN109694365A - Compounds and organic luminescent device comprising it - Google Patents

Compounds and organic luminescent device comprising it Download PDF

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Publication number
CN109694365A
CN109694365A CN201811222653.9A CN201811222653A CN109694365A CN 109694365 A CN109694365 A CN 109694365A CN 201811222653 A CN201811222653 A CN 201811222653A CN 109694365 A CN109694365 A CN 109694365A
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layer
compound
unsubstituted
substituted
luminescent device
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安贤哲
姜京敏
金熙宙
咸昊完
金东骏
朴旻洙
韩政佑
林东焕
李萤振
林大喆
金昇好
文锺勋
徐净雅
权桐热
李成圭
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Dongjin Semichem Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07DHETEROCYCLIC COMPOUNDS
    • C07D307/00Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
    • C07D307/77Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom ortho- or peri-condensed with carbocyclic rings or ring systems
    • C07D307/91Dibenzofurans; Hydrogenated dibenzofurans
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C211/00Compounds containing amino groups bound to a carbon skeleton
    • C07C211/43Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C211/54Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to two or three six-membered aromatic rings
    • CCHEMISTRY; METALLURGY
    • C07ORGANIC CHEMISTRY
    • C07CACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C211/00Compounds containing amino groups bound to a carbon skeleton
    • C07C211/43Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton
    • C07C211/57Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton
    • C07C211/61Compounds containing amino groups bound to a carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings of the carbon skeleton having amino groups bound to carbon atoms of six-membered aromatic rings being part of condensed ring systems of the carbon skeleton with at least one of the condensed ring systems formed by three or more rings
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/11OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/14Carrier transporting layers
    • H10K50/15Hole transporting layers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K50/00Organic light-emitting devices
    • H10K50/10OLEDs or polymer light-emitting diodes [PLED]
    • H10K50/17Carrier injection layers
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60Organic compounds having low molecular weight
    • H10K85/615Polycyclic condensed aromatic hydrocarbons, e.g. anthracene
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60Organic compounds having low molecular weight
    • H10K85/631Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60Organic compounds having low molecular weight
    • H10K85/631Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine
    • H10K85/633Amine compounds having at least two aryl rest on at least one amine-nitrogen atom, e.g. triphenylamine comprising polycyclic condensed aromatic hydrocarbons as substituents on the nitrogen atom
    • HELECTRICITY
    • H10SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10KORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K85/00Organic materials used in the body or electrodes of devices covered by this subclass
    • H10K85/60Organic compounds having low molecular weight
    • H10K85/649Aromatic compounds comprising a hetero atom
    • H10K85/657Polycyclic condensed heteroaromatic hydrocarbons
    • H10K85/6574Polycyclic condensed heteroaromatic hydrocarbons comprising only oxygen in the heteroaromatic polycondensed ring system, e.g. cumarine dyes

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  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Physics & Mathematics (AREA)
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  • Engineering & Computer Science (AREA)
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  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)

Abstract

The present invention relates to compounds and comprising its organic luminescent device, the compounds of an example according to the present invention are suitable for organic luminescent device, it can be ensured that high efficiency, long-life, low driving voltage and the driving stability of organic luminescent device.

Description

Compounds and organic luminescent device comprising it
Technical field
The present invention relates to compounds and include its organic luminescent device.
Background technique
In Organic Light Emitting Diode, the material as organic matter layer can be broadly dassified into luminescent material, sky according to function Hole injection material, hole transporting material, electron transport materials, electron injection material etc..Also, above-mentioned luminescent material can according to point Son amount is classified as macromolecule and low molecule, and the phosphor of the singlet excited state from electronics can be classified as according to luminescence mechanism Material and the triplet excitation state from electronics phosphor material, luminescent material can be classified as according to illuminant colour blue, green, Yellow and orange light emitting materials needed for red illuminating material and the better natural colour of embodiment.Also, in order to increase excitation purity, and Increase luminous efficiency by energy transfer, main body/dopant class can be used as luminescent substance.If its principle is will be with main composition The main body of luminescent layer is compared, and the dopant that band gap is small and luminous efficiency is outstanding is mixed in auxiliary layer on a small quantity, then in main body The exciton of generation is conveyed to dopant, to issue high-efficient light.At this point, the wavelength of main body is moved to the wavelength band of dopant It is dynamic, thus the light of required wavelength can be obtained according to the type of the dopant and main body utilized.
So far, as the substance for being used in this organic luminescent device, well-known there are many compounds, but are utilizing So far it in the case where the organic luminescent device of well-known substance, due to high driving voltage, low efficiency and short life, holds It is continuous to require to develop new material.Therefore, ongoing effort developed using the substance with outstanding characteristic with low voltage drive, High brightness and the organic luminescent device of long-life.
Existing technical literature
Patent document
(patent document 1) KR published patent 10-2015-0086721
Summary of the invention
The present invention provides compounds and preparation method thereof and the organic luminescent device comprising it.
But problem to be solved by this invention is not limited to problem described above, the technical field of the invention Those of ordinary skill can be clearly understood that the other problems not described according to contents below.
First embodiment of the invention provides the compound indicated by following formula 1:
Chemical formula 1
In above-mentioned chemical formula 1,
A and B is each independently substituted or unsubstituted C6~30Aryl, substituted or unsubstituted C5~30Heteroaryl, Or NAr1Ar2, at least one of A and B are NAr1Ar2, Ar1And Ar2It is each independently substituted or unsubstituted C6~30's Aryl, substituted or unsubstituted C5~30Heteroaryl,
L1And L2It is each independently Direct Bonding, substituted or unsubstituted C6~30Arlydene or substituted or unsubstituted C5~30Heteroarylidene.
It includes containing chemical combination of the invention that second embodiment of the present invention, which is provided between first electrode and second electrode, The organic luminescent device of the organic matter layer of object.
The compound of an example according to the present invention includes to be connected to the terphenyl at ortho position (ortho) and be connected to above-mentioned The aryl or arylamine at the ortho position (ortho) of terphenyl form the HOMO energy level for being readily injected into hole and conveying hole, simultaneously The high lumo energy for being easy to block electronics can be formed.Thus be used in organic luminescent device, it can be achieved that organic luminescent device it is low Voltage and higher efficiency.
Also, terphenyl structure of the compound of the present invention because being connected to ortho position, can maintain high T1, be suitable for phosphorescence , it can be achieved that high efficiency, the film of molecule is formed and interface arrangement is outstanding when device, increase hole flow (hole Mobility), it can inhibit (roll-off) phenomenon of roll-offing, thus can realize high efficiency and the long-life of organic luminescent device.And And terphenyl is combined with one or two arylamine, can be maintained high glass transition temperature (Tg), can be prevented the weight of film Crystallization, thus can increase thermal stability, and can ensure that driving stability.
Detailed description of the invention
Fig. 1 shows the schematic diagrams of the organic luminescent device of an example of the invention.
The explanation of appended drawing reference
100: substrate
200: hole injection layer
300: hole transporting layer
400: luminescent layer
500: electron supplying layer
600: electron injecting layer
1000: anode
2000: cathode
Specific embodiment
Hereinafter, referring to attached drawing, the example and embodiment that the present invention will be described in detail, so that the technical field of the invention is general Logical technical staff can be easy to implement.
But the present invention can by it is a variety of it is different in the form of realize, and be not limited to example and embodiment described herein. Also, the part unrelated with explanation is omitted, in the specification, for similar in the figure in order to clearly state the present invention Part, be labelled with similar appended drawing reference.
In the full text of description of the invention, when a component is located at another component "upper", not only include component with The case where another component is in contact, include thes case where there is other component between the two parts.
In the full text of description of the invention, when one structural element of a part " comprising ", unless there are especially opposite It records, then means to may also include other structures element, rather than exclude other structures element.In the full text of description of the invention The term " about " that uses, " substantial " etc. prompted in mentioned meaning intrinsic preparation and substance tolerance Shi Yiqi numerical value or Meaning close to its numerical value uses, and is undeservedly utilized with the infringer for preventing against one's conscience and is referred to help to understand the present invention The disclosure of accurate or absolute numerical value.Term "~() step " used in the full text of description of the invention or "~ Step " do not mean that " for~the step of ".
In the full text of description of the invention, " their combination " contained in the performance of Markush (Markush) form this One term means one or more of the group that documented multiple structural elements form in the performance by Markush form Mixing or combination, it is meant that including selected from one or more of the group that is made of above-mentioned multiple structural elements.
In the full text of description of the invention, " A and/or B " this record means " A or B or A and B ".
In the full text of description of the invention, term " aryl " means comprising C6-30Aromatic cyclic hydrocarbon group, for example, benzene Base, benzyl, naphthalene, xenyl, terphenyl, fluorenes, phenanthryl base, triphenyl alkenyl, phenylakenyl,Base, fluorane thiophene first Base, benzo fluorenyl, benzo triphenyl alkenyl, benzoThe aromatic ring of base, anthryl, stilbenyl, pyrenyl etc., " heteroaryl Base " is as the C comprising at least one miscellaneous element5-30Aromatic ring, such as, it is meant that comprising from pyrrolinyl, pyrazinyl, pyrrole Piperidinyl, indyl, isoindolyl, furyl, benzofuranyl, isobenzofuran-base, dibenzofuran group, aisaa benzothiophenyl, Dibenzo thiophenyl, quinolyl, isoquinolyl, quinoxalinyl, carbazyl, phenanthryl cry base, acridinyl, phenanthryl cough up quinoline base, thiophene Base and by pyridine ring, pyridine ring, pyrimidine ring, pyridazine ring, triazine ring, indole ring, quinoline ring, acridine ring, pyrrolidine ring, dioxanes Ring, piperidine ring, morpholine ring, piperazine ring, carbazole ring, furan nucleus, thiphene ring, oxazole ring, oxadiazoles ring, benzoxazoles ring, thiazole The fragrance that ring, thiadiazole ring, benzothiazole ring, triazole ring, imidazole ring, benzimidazole ring, pyranoid ring, dibenzofurans ring are formed Race's heterocycle.
In the full text of description of the invention, " substitution " in term " substituted or unsubstituted " may imply that selected from by weight Hydrogen, halogen, amino, itrile group, nitro or C1~C20Alkyl, C2~C20Alkenyl, C1~C20Alkoxy, C3~C20Cycloalkanes Base, C3~C20Heterocyclylalkyl, C6~C30Aryl and C3~C30The group of one or more of group of heteroaryl composition take Generation.Also, in description of the invention full text, identical appended drawing reference can have identical as long as no the special content referred to The meaning.
First embodiment of the invention provides the compound indicated by following formula 1:
Chemical formula 1
In above-mentioned chemical formula 1,
A and B is each independently substituted or unsubstituted C6~30Aryl, substituted or unsubstituted C5~30Heteroaryl, Or NAr1Ar2, at least one of A and B are NAr1Ar2, Ar1And Ar2It is each independently substituted or unsubstituted C6~30's Aryl, substituted or unsubstituted C5~30Heteroaryl,
L1And L2It is each independently Direct Bonding, substituted or unsubstituted C6~30Arlydene or substituted or unsubstituted C5~30Heteroarylidene.
Above-mentioned Ar1And Ar2It is connected and forms ring, or is possible to not form ring.
The compound of an example according to the present invention includes to be connected to the terphenyl at ortho position (ortho) and be connected to above-mentioned The aryl or arylamine at the ortho position (ortho) of terphenyl form the HOMO energy level for being readily injected into hole and conveying hole, simultaneously The high lumo energy for being easy to block electronics can be formed.Thus be used in organic luminescent device, it can be achieved that organic luminescent device it is low Voltage and higher efficiency.
Also, terphenyl structure of the compound of the present invention because being connected to ortho position, can maintain high T1, be suitable for phosphorescence , it can be achieved that high efficiency, the film of molecule is formed and interface arrangement is outstanding when device, increase hole flow (hole Mobility), it can inhibit (roll-off) phenomenon of roll-offing, thus can realize high efficiency and the long-life of organic luminescent device.And And terphenyl is combined with one or two arylamine, can be maintained high glass transition temperature (Tg), can be prevented the weight of film Crystallization, thus can increase thermal stability, and can ensure that driving stability.
In an example of the invention, above-mentioned A and B be each independently phenyl, xenyl, naphthalene, terphenyl, fluorenes, Dimethyl fluorene, diphenylfluorene, dibenzofurans, dibenzothiophenes, carbazole or their combination.These combinations may imply that benzene The structure that the aryl of base, xenyl, naphthalene, terphenyl, fluorenes, dimethyl fluorene or diphenylfluorene etc. is connected.For example, there is phenyl The structure etc. that structure, phenyl, fluorenes and the naphthalene that structure, phenyl and the fluorenes being connected with naphthalene are connected are connected, is not limited to This, and may imply that the structure that 2 or more aryl are connected.
In an example of the invention, above-mentioned L1And L2Be each independently phenyl, xenyl, naphthalene, terphenyl, fluorenes, Dimethyl fluorene, diphenylfluorene or their combination.
An example according to the present invention, above compound can be indicated by following formula 2 or chemical formula 3.
In above-mentioned chemical formula 2 or chemical formula 3,
Ar3、Ar4、Ar5And Ar6It is each independently substituted or unsubstituted C6~30Aryl or substituted or unsubstituted C5~30Heteroaryl,
X is CR1R2、NR3, O or S, R1、R2And R3It is each independently hydrogen, heavy hydrogen, substituted or unsubstituted C1~24Alkane Base, substituted or unsubstituted C6~30Aryl or substituted or unsubstituted C5~30Heteroaryl.
Above-mentioned Ar3And Ar4Or Ar5And Ar6It can be connected each independently and form ring or be possible to not form ring.
In an example of the invention, above-mentioned Ar3、Ar4、Ar5And Ar6Can be each independently phenyl, xenyl, naphthalene, Terphenyl, fluorenes, dimethyl fluorene, diphenylfluorene, dibenzofurans, dibenzothiophenes, carbazole or their combination.
In an example of the invention, above-mentioned Ar3And Ar4Can be identical, Ar5And Ar6It can be identical.Or Ar3、Ar4、Ar5And Ar6It can be identical.Or Ar3It can be with Ar5It is identical, Ar4It can be with Ar6It is identical.
In an example of the invention, by above-mentioned chemical formula 3 indicate the case where compound can be formed be suitable for shining it is auxiliary The HOMO energy level of layer is helped, in this case, it can be achieved that the low-voltage of organic luminescent device, high efficiency and long-life.
Also, in above-mentioned chemical formula 2, there is Ar3With Ar5Identical and Ar4With Ar6When identical symmetrical structure, it can be formed It is suitable for the HOMO energy level of hole transporting layer, this feelings see down low-voltage, high efficiency and longevity, it can be achieved that organic luminescent device Life.At this point, there is Ar in above-mentioned chemical formula 23With Ar5Identical and Ar4With Ar6Identical symmetrical structure, Ar3And Ar5Include two In the case where benzofuran, can more it improve the service life.
An example according to the present invention, above compound can be indicated by following formula 4.
Chemical formula 4
The compound indicated by above-mentioned chemical formula 4 connects arylamine and hexichol at the ortho position of terphenyl (ortho) respectively And furans, this compound can more improve the life characteristic of organic luminescent device.
An example according to the present invention, the compound indicated by above-mentioned chemical formula 2 can be according to the works such as following formula 1 Sequence is synthesized:
Reaction equation 1
An example according to the present invention, the compound indicated by above-mentioned chemical formula 3 can be according to the works such as following formulas 2 Sequence is synthesized:
Reaction equation 2
In an example of the invention, the compound indicated by above-mentioned chemical formula 1 to chemical formula 4 can be disclosed below Compound, it is possible to not limited to this:
According to an embodiment of the present invention, the compound indicated by above-mentioned chemical formula 1 to 4 can be in following compound It is any.Following compound can more effectively realize the long-life of device.
Second embodiment of the present invention provides the organic luminescent device of the compound comprising being indicated by above-mentioned chemical formula 1. Above-mentioned organic luminescent device can include the organic of 1 layer or more containing the compounds of this invention between first electrode and second electrode Nitride layer.
In an example of the invention, above-mentioned organic matter layer can be hole injection layer, hole transporting layer and the auxiliary that shines Layer, it is likely that being not limited except as.Also, the compound of the present invention formed organic matter layer when, can be used alone or with it is well known Organic luminescent compounds are used together.
Above-mentioned organic luminescent device can be between first electrode (anode, anode) and second electrode (cathode, cathode) Including 1 layer or more of hole injection layer (HIL), hole transporting layer (HTL), luminescent layer (EML), electron supplying layer (ETL), electronics The organic matter layer of implanted layer (EIL) etc..
For example, above-mentioned organic luminescent device can be prepared according to structure documented in Fig. 1.Organic luminescent device can To it is lower and on stack gradually anode (hole injecting electrode 1000)/200/ hole transporting layer of hole injection layer, 300/ luminescent layer 400/ 500/ electron injecting layer of electron supplying layer, 600/ cathode (electron injection electrode 2000).
In Fig. 1, the substrate for organic luminescent device is can be used in substrate 100, in particular, can be steady for mechanical strength, heat Qualitative, transparent, surface smoothness, ease of handling and the outstanding transparent glass substrate or flexible plastic base of waterproofness Plate.
Hole injecting electrode 1000 is used as the anode for being injected with the hole of machine luminescent device.In order to which hole can be injected, It, can be by tin indium oxide (ITO), indium zinc oxide (IZO), graphene (graphene) etc using the substance with low work function Transparent material formed.
By vacuum deposition method, spin-coating method, casting, LB (Langmuir-Blodgett) method etc. come in above-mentioned anode electricity Pole overburden hole injection layer substance, thus can form hole injection layer 200.Sky is being formed by above-mentioned vacuum deposition method In the case where the implanted layer of cave, the compound of material of the sedimentary condition because being used as hole injection layer 200, needed for hole injection layer Structure and thermal characteristics etc. and it is different, but usually can 50-500 DEG C depositing temperature, 10-8To 10-3The vacuum degree of torr (support), 0.01 toDeposition velocity,It is suitably selected in 5 μm of layer thickness range.
Then, by vacuum deposition method, spin-coating method, casting, LB method etc. come in above-mentioned 200 overburden of hole injection layer Thus hole transporting layer substance can form hole transporting layer 300.Hole transporting layer is being formed by above-mentioned vacuum deposition method In the case of, sedimentary condition is different due to the compound used, but typically it will be preferred to, the formation with hole injection layer almost It is selected in identical condition and range.
The compound of the present invention can be used in above-mentioned hole transporting layer 300, as described above, can be used alone or with it is well known Compound is used together the compound of the present invention.Also, the hole transporting layer 300 of an example of the invention can be 1 layer or more, It can together include the hole transporting layer only formed by well known substance.Also, an example according to the present invention, it is defeated in above-mentioned hole Luminous auxiliary layer can be formed by sending on layer 300.In the present invention, luminous auxiliary layer refer to be formed in hole transporting layer and luminescent layer it Between layer, according to the quantity of hole transporting layer, also referred to as the second hole transporting layer or third hole transporting layer etc..Above-mentioned hair The compound of the present invention can be used in light auxiliary layer, as described above, can be used alone the compound of the present invention or with well known chemical combination Object is used together.
By the methods of vacuum deposition method, spin-coating method, casting, LB method, in above-mentioned hole transporting layer 300 or the auxiliary that shines Layer overburden luminescent layer substance, thus can form luminescent layer 400.In the feelings for forming luminescent layer by above-mentioned vacuum deposition method Under condition, sedimentary condition is different due to the compound used, but typically it will be preferred to, in the almost phase of the formation with hole injection layer It is selected in same condition and range.Also, well known compound can be used as main body or dopant by above-mentioned emitting layer material.
Also, in the case where being used together in luminescent layer with phosphorescent dopants, triplet exciton or hole in order to prevent The phenomenon that spreading to electron supplying layer can also be laminated hole by vacuum deposition method or spin-coating method and inhibit material (HBL).At this time may be used The hole inhibiting substances used are not particularly limited, but selection in the well known substance of material can be inhibited any from hole is used as Substance utilizes.For example, oxadiazole derivatives can be enumerated or triazole derivative, phenanthryl cough up quinoline derivant or Japanese Unexamined Patent Publication 11- Documented hole inhibits material etc. in 329734 (A1), typically, can be used Balq (bis- (8- hydroxy-2-methylquinolines)- Aluminium biphenyl phenates), phenanthryl cough up quinoline (phenanthrolines) class compound (such as BCP of general purpose display (UDC) company (Basso Coupoline)) etc..
It is formed with electron supplying layer 500 on 400 top of luminescent layer as formed above, at this point, above-mentioned electron supplying layer can lead to The methods of vacuum deposition method, spin-coating method, casting are crossed to be formed.Also, the sedimentary condition of above-mentioned electron supplying layer is because using Compound and it is different, but typically it will be preferred to, selected in the condition and range almost the same with the formation of hole injection layer.
Later, electron injecting layer 600 can be formed in above-mentioned 500 overburden electron injecting layer substance of electron supplying layer, At this point, above-mentioned electron supplying layer can form conventional electron injection by the method for vacuum deposition method, spin-coating method, casting etc. Layer substance.
Hole injection layer 200, hole transporting layer 300, luminescent layer 400, the electron supplying layer 500 of above-mentioned organic luminescent device The compound of the present invention or following substance can be used, alternatively, the compound of the present invention and well known substance can be used together.
The yin for injecting electronics is formed on electron injecting layer 600 by the method for vacuum deposition method or sputtering method etc. Pole 2000.As cathode, various metals can be used.Concrete example has the substance of aluminium, gold, silver etc..
Organic luminescent device of the invention can not only use anode, hole injection layer, hole transporting layer, luminescent layer, electricity Sub- transfer layer, electron injecting layer, cathode construction organic luminescent device, the knot of the organic luminescent device of various structures also can be used Structure can also form the middle layer of 1 layer or 2 layers as needed.
As described above, the thickness of each organic matter layer formed according to the present invention can be adjusted according to required degree Section, it is preferable that be specially 10 to 1000nm, more specifically 20 to 150nm.
Also, the organic matter layer in the present invention, comprising the compound indicated by above-mentioned chemical formula 1 can be by organic matter layer Thickness is adjusted to molecular unit, thus has the advantages that surface is uniform and morphological stability is prominent.
It is applicable that first embodiment of the invention recorded for the organic luminescent compounds of present embodiment Content, it is likely that being not limited except as.
Hereinafter, embodiment through the invention carries out more specific description, the scope of the present invention is not limited to the present embodiment.
Embodiment
Preparation example 1: the synthesis of main core (main core) 1
It is following to synthesize main core 1 (main core 1) for synthesising target compound.
In round-bottomed flask, by 1,2- phenylene hypoboric acid (1,2-phenylenediboronic acid) 100.0g Bromo- 2- iodobenzene (1-bromo-2-iodobenzene) 341.3g (1206.64mmol, 2eq) of (603.32mmol, 1eq), 1-, Pd (PPh3)434.85g (30.17mmol, 0.05eq), K3PO4256.13g (1206.64mmol, 2eq) is dissolved in the evil of Isosorbide-5-Nitrae-two Alkane (1,4-dioxan) 1000ml, H2After O 200mL, return stirring.After 2 hours, pass through thin-layered chromatography (TLC) Confirmation reaction terminates, and extracts organic layer with methylcellulose (MC).After being filtered under diminished pressure to the substance of extraction, with MC and just Hexane (Hexane) recrystallization, obtains 1 220g of main core (yield (yield)=94.0%, white solid (White solid)).
Preparation example 2: the synthesis of main core (main core) 2
For synthesising target compound, it regard the main core 1 obtained in above-mentioned preparation example 1 as initial substance, use is a variety of Reagent (Reagent) (dibenzo [b, p] furans -4- ylboronic acid (dibenzo [b, d] furan-4-ylboronic acid), two Benzo [b, p] furans -3- ylboronic acid (dibenzo [b, d] furan-3-ylboronic acid), dibenzo [b, p] furans -2- Ylboronic acid (dibenzo [b, d] furan-2-ylboronic acid)), by suzuki reaction (Suzuki reaction), into The synthesis of row main core 2.
In round-bottomed flask, by 1 50.0g of main core (128.8mmol, 1eq), dibenzo [b, p] furans -4- ylboronic acid (dibenzo [b, d] furan-4-ylboronic acid) 24.6g (115.94mmol, 0.9eq), Pd (PPh3)4 7.44g (6.44mmol, 0.05eq), K3PO454.7g (257.6mmol, 2eq) be dissolved in Isosorbide-5-Nitrae-dioxanes (Isosorbide-5-Nitrae-dioxane) 500mL, H2After O 100mL, return stirring.After 1 hour, terminated by thin-layered chromatography (TLC) confirmation reaction, with methyl fibre It ties up plain (MC) and extracts organic layer.After being filtered under diminished pressure to the substance of extraction, column purification is carried out, with MC and n-hexane (Hexane) it recrystallizes, obtains main core 2-1 51.74g (yield (yield)=84.5%, white solid (White solid)). Using different reagents (Reagent), main core 2-2,2-3 such as flowering structure is obtained.
Compound synthesis
Compound 1
In round-bottomed flask, by main core 2-1 10.0g (21.01mmol, 1eq), diphenylamines (diphenylamine) 3.56g (21.01mmol, 1.0eq), Pd2(dba)30.38g (0.42mmol, 0.02eq), tri-tert-butylphosphine (Tri-tert- Butylphosphine) 0.2g (0.84mmol, 0.04eq), NaOtBu 4.04g (42.02mmol, 2eq) are dissolved in toluene (Toluene) after 100mL, return stirring.After 5 hours, is terminated by thin-layered chromatography (TLC) confirmation reaction, used Methylcellulose (MC) extracts organic layer.Column purification and recrystallization are carried out to the substance of extraction, 1 10.9g of compound is obtained and (receives Rate (yield)=91.7%, white solid (White solid)).
Compound 2 to 16
Using method identical with the synthesis of above compound 1, main core 2-1 is used as initial substance, uses following table 1 Substance replace diphenylamines (diphenylamine), thus synthesize compound 2 to 16.
Table 1
Compound 17 to 32
Using method identical with the synthesis of above compound 1, used in main core 2-2 and following table 2 as initial substance The substance of record replaces main core 2-1, thus synthesizes compound 17 to 32.
Table 2
Compound 33 to 48
Using method identical with the synthesis of above compound 1, main core 2-3 and following table 3 are used as initial substance Substance replaces main core 2-1, thus synthesizes compound 33 to 48.
Table 3
Compound 49
In round-bottomed flask, 1 10.0g of main core (25.77mmol, 1eq), diphenylamines (dip henylamine) 9.16g (54.12mmol, 2.1eq), Pd2(dba)30.47g (0.52mmol, 0.02eq), tri-tert-butylphosphine (Tri-tert- Butylphosphine) 0.25mL (1.03mmol, 0.04eq), NaOtBu 4.95g (51.53mmol, 2eq) are dissolved in toluene (Toluene) after, return stirring.After 2 hours, terminated by thin-layered chromatography (TLC) confirmation reaction, with methyl fibre It ties up plain (MC) and extracts organic layer.Column purification and recrystallization are carried out to the substance of extraction, obtain 49 11.6g (yield of compound (yield)=80.0%, white solid (White solid)).
Compound 50 to 56
Using method identical with the synthesis of above compound 49, main core 1 is used as initial substance, uses following table 4 Substance replace diphenylamines (diphenylamine), thus synthesize compound 50 to 56.
Table 4
Liquid chromatography-mass spectrometry (the LC-MS:Liquid chromat ography mass of above compound 1 to 56 Spectrometry) and1H NMR (CDCl3,300Mz) is shown in following table 5 and table 6.
Table 5
Table 6
The preparation of organic luminescent device
Embodiment 1: it is used as and shines auxiliary layer (the second hole transporting layer)
By distilled water ultrasonic wave toThickness by tin indium oxide (ITO) be applied as the glass substrate of film into Row washing.If distillation water washing terminates, ultrasonic washing is carried out using the solvent of isopropanol, acetone, methanol etc., and carry out After drying, it is transferred to plasma cleaner, after then being cleaned aforesaid substrate 5 minutes using oxygen plasma, is being aoxidized Indium tinbase plate top utilizes thermal vacuum depositor (thermal evaporator), will as hole injection layer's DNTPD、HATCN be filmed, as the first hole transporting layer willNPB be filmed, as second sky Cave transfer layer willCompound 1 be filmed after, as above-mentioned luminescent layer doping 3% BH01:BD01, withIt is filmed.It then, will as electron supplying layerET01:Liq (1:1) be filmed after, will's LiF、Aluminium (Al) be filmed, and the device is sealed (Encapsulation) in glove box, thus It is prepared for organic luminescent device.
Embodiment 2 is to embodiment 48
Using method same as Example 1, it is prepared for being made using compound 2 to compound 48 instead of compound 1 The organic luminescent device of film.
Comparative example 1 is to comparative example 4 and comparative example 9 to 12
Using method same as Example 1, compound is replaced using following Ref.1 to Ref.4 and Ref.9 to Ref.12 1 is prepared for organic luminescent device.
Embodiment 49: it is used as the first hole transporting layer
By distilled water ultrasonic wave toThickness by tin indium oxide (ITO) be applied as the glass substrate of film into Row washing.If distillation water washing terminates, ultrasonic washing is carried out using the solvent of isopropanol, acetone, methanol etc., and carry out After drying, it is transferred to plasma cleaner, after then being cleaned aforesaid substrate 5 minutes using oxygen plasma, is being aoxidized Indium tinbase plate top utilizes thermal vacuum depositor (thermal evaporator), will as hole injection layer's DNTPD、HATCN be filmed, as the first hole transporting layer willCompound 49 be filmed, as Two hole transporting layers willDN TPD be filmed after, as above-mentioned luminescent layer doping 3% BH01:BD01, with 2It is filmed.It then, will as electron supplying layerET01:Liq (1:1) be filmed after, will's LiF、Aluminium (Al) be filmed, and the device is sealed (Encapsulation) in glove box, thus It is prepared for organic luminescent device.
Embodiment 50 is to embodiment 56
Using method identical with embodiment 49, it is prepared for replacing compound 49 to carry out using compound 50 to compound 56 The organic luminescent device of film.
Comparative example 5 is to comparative example 8 and comparative example 13 to 16
Using method identical with embodiment 49, chemical combination is replaced using following Ref.5 to Ref.8 and Ref.13 to Ref.16 Object 49 is prepared for organic luminescent device.
The performance evaluation of organic luminescent device
Applied using 2400 source measuring unit of Keithley (2400 source measureme nt unit of Kiethley) Voltage injects electronics and hole, is surveyed using Konica Minolta (Konica Minolta) spectroradiometer (CS-2000) Thus under atmospheric conditions brightness when shining surely is measured for applying alive current density and brightness, to have rated The performance of the organic luminescent device of Examples and Comparative Examples, and the results are shown in table 7 and table 8.
Table 7
As shown in Table 7 above, the embodiment of the present invention is compared with comparative example 1 to 4, comparative example 9 to 12, it is seen that organic light emission The result that the efficiency of device and service life rise.
More specifically, being connected to the contraposition (Para) of terphenyl or the comparative example of meta position (Meta) with arylamine or aryl 1 to 4 compares, and the arylamine or aryl of embodiment 1 to 48 are connected to the ortho position (Ortho) of terphenyl, has high T1 value, thin Film is formed and interface arrangement is outstanding, is had quick hole flow (hole mobility).Also, by dibenzofurans The characteristic of more long-life is presented as the embodiment 1 to 16 of binding site for 4th position.
Table 8
Op.V mA/cm2 Cd/A lm/w CIEx CIEy LT95
Embodiment 49 3.913 10 7.41 6.62 0.139 0.111 160
Embodiment 50 3.910 10 7.39 6.60 0.140 0.110 162
Embodiment 51 3.913 10 7.52 6.62 0.139 0.111 160
Embodiment 52 3.910 10 7.38 6.60 0.140 0.110 162
Embodiment 53 3.913 10 7.41 6.62 0.139 0.111 180
Embodiment 54 3.910 10 7.39 6.60 0.140 0.110 210
Embodiment 55 3.913 10 7.52 6.62 0.139 0.111 170
Embodiment 56 3.910 10 7.38 6.60 0.140 0.110 170
Comparative example 5 4.201 10 6.02 5.26 0.141 0.110 90
Comparative example 6 4.222 10 6.40 5.38 0.141 0.110 95
Comparative example 7 4.471 10 6.29 5.48 0.141 0.111 100
Comparative example 8 4.106 10 6.11 5.19 0.141 0.112 85
Comparative example 13 4.111 10 6.16 5.88 0.141 0.110 100
Comparative example 14 4.271 10 6.55 5.55 0.141 0.110 110
Comparative example 15 4.335 10 6.51 5.55 0.141 0.111 90
Comparative example 16 4.296 10 6.19 5.67 0.141 0.112 80
As shown in Table 8 above, the embodiment of the present invention 49 to 56, can be true compared with comparative example 5 to 8, comparative example 13 to 16 Recognize that efficiency and service life rise as a result, can simultaneously confirm that physical property upper in all respects is outstanding.
More specifically, being incorporated in three with arylamine or aryl when two ends of terphenyl have symmetrical structure The contraposition (Para) of xenyl or the comparative example of meta position (Meta) are compared, the arylamine or aryl of the embodiment of the present invention 49 to 56 It is connected to the ortho position (Ortho) of terphenyl, can be confirmed with high efficiency, the characteristic of long-life.Also, it can confirm in terphenyl Base has the long-life characteristics of the embodiment 53,54 of 2 dibenzofuran groups especially outstanding.
Also, compared with comparative example 5 to 8, comparative example 13 to 16, arylamine or aryl are connected to the ortho position of terphenyl (Ortho) embodiment 49 to 56 has high T1 value, and film is formed and interface arrangement is outstanding, has quick hole flow (hole mobility), it is thus upper outstanding in terms of all physical property, and confirm the structure for being suitable for hole transporting layer.
The explanation of aforementioned present invention is for illustrative, and general technical staff of the technical field of the invention can manage Solution can be easily deformed in other specific ways in the case where not changing technical idea or essential feature of the invention.Therefore, It should be understood that various embodiments described above be in all respects it is illustrative, without being restrictive.For example, being said with single type Bright each structural element is implemented dispersiblely, and equally, illustrating also can be in a manner of combination for multiple structural elements of dispersion Implement.
Range Representation, rather than above-mentioned detailed description, patent is claimed by appended patented invention in the scope of the present invention The meaning and range and the mode for having altered or deforming as derived from its equivalents for inventing claimed range should be by It is construed to be included within the scope of the present invention.

Claims (13)

1. a kind of compound, which is characterized in that indicated by following formula 1:
Chemical formula 1
In the chemical formula 1,
A and B is each independently substituted or unsubstituted C6~30Aryl, substituted or unsubstituted C5~30Heteroaryl or NAr1Ar2, at least one of A and B are NAr1Ar2, Ar1And Ar2It is each independently substituted or unsubstituted C6~30Aryl, Substituted or unsubstituted C5~30Heteroaryl,
L1And L2It is each independently Direct Bonding, substituted or unsubstituted C6~30Arlydene or substituted or unsubstituted C5~30Heteroarylidene.
2. compound according to claim 1, which is characterized in that the A and B is each independently phenyl, xenyl, naphthalene Base, terphenyl, fluorenes, dimethyl fluorene, diphenylfluorene, dibenzofurans, dibenzothiophenes, carbazole or their combination.
3. compound according to claim 1, which is characterized in that the compound is by 3 table of following formula 2 or chemical formula Show:
In the chemical formula 2 or chemical formula 3,
Ar3、Ar4、Ar5And Ar6It is each independently substituted or unsubstituted C6~30Aryl or substituted or unsubstituted C5~30 Heteroaryl,
X is CR1R2、NR3, O or S, R1、R2And R3It is each independently hydrogen, heavy hydrogen, substituted or unsubstituted C1~24Alkyl, take Generation or unsubstituted C6~30Aryl or substituted or unsubstituted C5~30Heteroaryl.
4. compound according to claim 1 or 3, which is characterized in that the L1And L2It is each independently phenyl, biphenyl Base, naphthalene, terphenyl, fluorenes, dimethyl fluorene, diphenylfluorene or their combination.
5. compound according to claim 3, which is characterized in that the Ar3、Ar4、Ar5And Ar6It is each independently benzene Base, xenyl, naphthalene, terphenyl, fluorenes, dimethyl fluorene, diphenylfluorene, dibenzofurans, dibenzothiophenes, carbazole or they Combination.
6. compound according to claim 3, which is characterized in that the Ar3For with Ar5Identical aryl, Ar4For with Ar6 Identical aryl.
7. compound according to claim 3, which is characterized in that the Ar3With Ar5It is identical, Ar4With Ar6It is identical, Ar3And Ar5For dibenzofurans.
8. compound according to claim 3, which is characterized in that the compound is indicated by following formula 4:
Chemical formula 4
9. compound according to claim 1, which is characterized in that the compound is one of following compound,
10. a kind of organic luminescent device, which is characterized in that include containing claim 1 between first electrode and second electrode To the organic matter layer of compound described in any one of 7.
11. organic luminescent device according to claim 10, which is characterized in that the organic matter layer be hole injection layer, 1 layer or more in hole transporting layer and luminous auxiliary layer.
12. organic luminescent device according to claim 11, which is characterized in that the organic matter layer is hole transporting layer.
13. organic luminescent device according to claim 11, which is characterized in that the organic matter layer is the auxiliary layer that shines.
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