US20180123051A1 - Compound for organic electric element, organic electric element using the same, and electronic device thereof - Google Patents

Compound for organic electric element, organic electric element using the same, and electronic device thereof Download PDF

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US20180123051A1
US20180123051A1 US15/566,628 US201715566628A US2018123051A1 US 20180123051 A1 US20180123051 A1 US 20180123051A1 US 201715566628 A US201715566628 A US 201715566628A US 2018123051 A1 US2018123051 A1 US 2018123051A1
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group
compound
sub
ring
formula
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Mun Jae LEE
Soung Yun MUN
Jae Taek KWON
Dae Sung Kim
Moo Jin Park
Sun Hee Lee
Sun Pil HWANG
Ho Young JUNG
Bum Sung LEE
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DukSan Neolux Co Ltd
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DukSan Neolux Co Ltd
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Priority claimed from KR1020160126778A external-priority patent/KR101786749B1/ko
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Assigned to DUK SAN NEOLUX CO., LTD. reassignment DUK SAN NEOLUX CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HWANG, SUN PIL, JUNG, HO YOUNG, KIM, DAE SUNG, KWON, Jae Taek, LEE, BUM SUNG, LEE, SUN HEE, MUN, SOUNG YUN, PARK, MOO JIN, LEE, MUN JAE
Publication of US20180123051A1 publication Critical patent/US20180123051A1/en
Priority to US17/213,157 priority Critical patent/US20210242410A1/en
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    • Y02E10/549—Organic PV cells

Definitions

  • the present invention relates to compound for organic electric element, organic electric element using the same, and an electronic device thereof.
  • organic light emitting phenomenon refers to a phenomenon that converts electric energy into light energy by using an organic material.
  • An organic electric element using an organic light emitting phenomenon usually has a structure including an anode, a cathode, and an organic material layer interposed therebetween.
  • the organic material layer is often composed of a multi-layered structure composed of different materials, and for example, may include a hole injection layer, a hole transport layer, an emitting layer, an electron transport layer, an electron injection layer and the like.
  • a material used as an organic material layer in an organic electric element may be classified into a light emitting material and a charge transport material, such as a hole injection material, a hole transport material, an electron transport material, an electron injection material and the like depending on its function.
  • the difference in properties according to the material structure is so large that it is applied to various layers as a material of an organic electric element.
  • it has characteristics of different band gaps (HOMO, LUMO), electrical characteristics, chemical properties, and physical properties depending on the number of rings, fused positions and the type and arrangement of heteroatoms, therefore application development for layers of various organic electric elements using the same has been progressed.
  • Patent Documents 1 to 4 the performance of the 5-membered cyclic compound in the polycyclic compound has been reported depending on the hetero type, arrangement, substituent type, fused position, and the like.
  • Patent Document 1 U.S. Pat. No. 5,843,607
  • Patent Document 2 Japanese Laid-Open Patent Publication No. 1999-162650
  • Patent Document 3 Korean Published Patent Application No. 2008-0085000
  • Patent Document 4 US Patent Publication No. 2010-0187977
  • Patent Document 5 Korean Published Patent Application No. 2011-0018340
  • Patent Document 6 Korean Published Patent 2009-0057711
  • Patent Documents 1 and 2 disclose an embodiment in which the indolecarbazole core in which the hetero atom in the 5-membered cyclic compound is composed only of nitrogen (N) is used, and an aryl group substituted or unsubstituted in N of indolocarbazole is used.
  • N nitrogen
  • Patent Documents 1 and 2 disclose an embodiment in which the indolecarbazole core in which the hetero atom in the 5-membered cyclic compound is composed only of nitrogen (N) is used, and an aryl group substituted or unsubstituted in N of indolocarbazole is used.
  • N nitrogen
  • Patent Documents 1 and 2 disclose an embodiment in which the indolecarbazole core in which the hetero atom in the 5-membered cyclic compound is composed only of nitrogen (N) is used, and an aryl group substituted or unsubstituted in N of indolocarbazole is used.
  • the prior invention 1 there exists only a simple ary
  • Patent Documents 3 and 4 disclose a compound in which pyridine, pyrimidine, triazine or the like containing an aryl group and N is substituted for an indolecarbazole core having a hetero atom N in the same 5-membered cyclic compound as in the above Patent Documents 1 and 2, however only the use examples for phosphorescent green host materials are described, and the performance for other heterocyclic compounds substituted for indolecarbazole core is not described.
  • Nitrogen (N), oxygen (O), sulfur (S), carbon and the like are described as heteroatom in the 5-membered cyclic compound, however there are only examples using the same heteroatom in the performance measurement data, the performance characteristics of a 5-membered cyclic compound containing a different heteroatom could not be confirmed.
  • the 5-membered cyclic compound molecules are generally laminated, as the adjacent ⁇ -electrons increase, they have a strong electrical interaction, and this is closely related to the charge carrier mobility, particularly, the same 5-membered cyclic compound of N—N type has an edge-to-face morphology as an order of arrangement of molecules when molecules are laminated, otherwise a different 5-membered cyclic compound with different heteroatoms has an antiparallel cofacial ⁇ -stacking structure in which the packing structure of the molecules is opposite to each other, so that the arrangement order of the molecules becomes face-to-face morphology. It is reported that the steric effect of the substituent substituted on the asymmetrically arranged hetero atom N as the cause of this laminated structure causes relatively high carrier mobility and high oxidation stability ( Org. Lett. 2008, 10, 1199).
  • Patent Document 6 an example of using as a fluorescent host material for various polycyclic compounds having seven or more membered cyclic compounds has been reported.
  • the LUMO and HOMO levels of the host material have a great influence on the efficiency and life span of the organic electric element, this is because the charge balance control in the emitting layer, the quenching of the dopant, and the reduction in efficiency and life span due to light emission at the interface of the hole transport layer can be prevented, depending on whether electron and hole injection in the emitting layer can be efficiently controlled.
  • the TRTP (Time Resolved Transient PL) measurement method is a method of observing a decay time over time after irradiating the host thin film with a pulsed light source, and therefore it is possible to identify the energy transfer method by observing the energy transfer and the lag time.
  • the TRTP measurement can distinguish between fluorescence and phosphorescence, an energy transfer method in a mixed host material, an exciplex energy transfer method, and a TADF energy transfer method.
  • the present invention has been proposed in order to solve the problems of the phosphorescent host material, and an object of the present invention is, by controlling the HOMO level of a host material of a phosphorescent emitting organic electric element including a phosphorescent dopant, to provide a compound capable of controlling charge balance and of improving efficiency and life span in an emitting layer, and an organic electric element using the same and an electronic device thereof.
  • the present invention can contain a mixture of a specific second host material in combination with a specific first host material as a main component so that the energy barrier of the emitting layer and the adjacent layer can be reduced, and provide high efficiency and long life span of the organic electric element by maximizing the charge balance in the emitting layer.
  • the present invention provides an organic electronic element characterized by comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, wherein the organic material layer comprises an emitting layer, wherein the emitting layer comprises a first host compound represented by Formula 1 and a second host compound represented by Formula 2.
  • the present invention also provides organic electric elements and electronic devices using the compounds represented by the Formulas.
  • the mixture according to the present invention as a phosphorescent host material, it is possible to achieve a high luminous efficiency and a low driving voltage of an organic electric element, and the life span of the device can be greatly improved.
  • FIG. 1 is an illustration of an organic electroluminescent device according to the present invention.
  • FIG. 2 shows the PL lifetime results of compounds 1-54 according to the present invention.
  • FIG. 3 shows the PL lifetime results of compounds 3-6 according to the present invention.
  • FIG. 4 shows the PL lifetime results when compound 1-54 and compound 3-6 according to the present invention were mixed.
  • 100 organic electric element
  • 110 substrate 120: the first electrode (anode)
  • 130 the hole injection layer 140: the hole transport layer
  • 141 a buffer layer 150: the emitting layer
  • 151 the emitting auxiliary layer 160: the electron transport layer
  • 170 the electron injection layer 180: the second electrode (cathode)
  • first, second, A, B, (a), (b) or the like may be used herein when describing components of the present invention.
  • Each of these terminologies is not used to define an essence, order or sequence of a corresponding component but used merely to distinguish the corresponding component from other component(s). It should be noted that if a component is described as being “connected”, “coupled”, or “connected” to another component, the component may be directly connected or connected to the other component, but another component may be “connected”, “coupled” or “connected” between each component.
  • halo or halogen, as used herein, includes fluorine, bromine, chlorine, or iodine.
  • alkyl or “alkyl group”, as used herein, has a single bond of 1 to 60 carbon atoms, and means saturated aliphatic functional radicals including a linear alkyl group, a branched chain alkyl group, a cycloalkyl group (alicyclic), an cycloalkyl group substituted with a alkyl or an alkyl group substituted with a cycloalkyl.
  • haloalkyl or “halogen alkyl”, as used herein, includes an alkyl group substituted with a halogen.
  • heteroalkyl means alkyl substituted one or more of carbon atoms consisting of an alkyl with hetero atom.
  • alkenyl or “alkynyl”, as used herein, has double or triple bonds of 2 to 60 carbon atoms, but is not limited thereto, and includes a linear or a branched chain group.
  • cycloalkyl means alkyl forming a ring having 3 to 60 carbon atoms, but is not limited thereto.
  • alkoxyl group means an oxygen radical attached to an alkyl group, but is not limited thereto, and has 1 to 60 carbon atoms.
  • alkenoxyl group means an oxygen radical attached to an alkenyl group, but is not limited thereto, and has 2 to 60 carbon atoms.
  • aryloxyl group or “aryloxy group”, as used herein, means an oxygen radical attached to an aryl group, but is not limited thereto, and has 6 to 60 carbon atoms.
  • aryl group or “arylene group”, as used herein, has 6 to 60 carbon atoms, but is not limited thereto.
  • the aryl group or arylene group means a monocyclic and polycyclic aromatic group, and may also be formed in conjunction with an adjacent group.
  • Examples of “aryl group” may include a phenyl group, a biphenyl group, a fluorene group, or a spirofluorene group.
  • aryl or “ar” means a radical substituted with an aryl group.
  • an arylalkyl may be an alkyl substituted with an aryl
  • an arylalenyl may be an alkenyl substituted with aryl
  • a radical substituted with an aryl has a number of carbon atoms as defined herein.
  • an arylalkoxy means an alkoxy substituted with an aryl
  • an alkoxylcarbonyl means a carbonyl substituted with an alkoxyl
  • an arylcarbonylalkenyl also means an alkenyl substituted with an arylcarbonyl, wherein the arylcarbonyl may be a carbonyl substituted with an aryl.
  • heteroalkyl means alkyl containing one or more of hetero atoms.
  • heteroaryl group or “heteroarylene group”, as used herein, means a C2 to C60 aryl containing one or more of hetero atoms or arylene group, but is not limited thereto, and includes at least one of monocyclic and polycyclic rings, and may also be formed in conjunction with an adjacent group.
  • heterocyclic group contains one or more heteroatoms, but is not limited thereto, has 2 to 60 carbon atoms, includes any one of monocyclic and polycyclic rings, and may include heteroaliphadic ring and/or heteroaromatic ring. Also, the heterocyclic group may also be formed in conjunction with an adjacent group.
  • heteroatom represents at least one of N, O, S, P, or Si.
  • heterocyclic group may include a ring containing SO 2 instead of carbon consisting of cycle.
  • heterocyclic group includes compound below.
  • aliphatic means an aliphatic hydrocarbon having 1 to 60 carbon atoms
  • aliphatic ring means an aliphatic hydrocarbon ring having 3 to 60 carbon atoms.
  • ring means an aliphatic ring having 3 to 60 carbon atoms, or an aromatic ring having 6 to 60 carbon atoms, or a hetero ring having 2 to 60 carbon atoms, or a fused ring formed by the combination of them, and includes a saturated or unsaturated ring.
  • hetero compounds or hetero radicals other than the above-mentioned hetero compounds include, but are not limited thereto, one or more heteroatoms.
  • carbonyl is represented by —COR′, wherein R′ may be hydrogen, an alkyl having 1 to 20 carbon atoms, an aryl having 6 to 30 carbon atoms, a cycloalkyl having 3 to 30 carbon atoms, an alkenyl having 2 to 20 carbon atoms, an alkynyl having 2 to 20 carbon atoms, or the combination of these.
  • ether is represented by —R—O—R′, wherein R or R′ may be independently hydrogen, an alkyl having 1 to 20 carbon atoms, an aryl having 6 to 30 carbon atoms, a cycloalkyl having 3 to 30 carbon atoms, an alkenyl having 2 to 20 carbon atoms, an alkynyl having 2 to 20 carbon atoms, or the combination of these.
  • substituted or unsubstituted means that substitution is substituted by at least one substituent selected from the group consisting of, but is not limited thereto, deuterium, halogen, an amino group, a nitrile group, a nitro group, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxyl group, a C 1 -C 20 alkylamine group, a C 1 -C 20 alkylthiopen group, a C 6 -C 20 arylthiopen group, a C 2 -C 20 alkenyl group, a C 2 -C 20 alkynyl group, a C 3 -C 20 cycloalkyl group, a C 6 -C 20 aryl group, a C 6 -C 20 aryl group substituted by deuterium, a C 8 -C 20 arylalkenyl group, a silane group, a boron
  • the substituent R 1 when a is an integer of zero, the substituent R 1 is absent, when a is an integer of 1, the sole substituent R 1 is linked to any one of the carbon constituting the benzene ring, when a is an integer of 2 or 3, they are respectively combined as follows, in which R 1 may be the same as or different from each other, and when a is an integer of 4 to 6, and it is bonded to the carbon of the benzene ring in a similar manner, whereas the indication of hydrogen bonded to the carbon forming the benzene ring is omitted.
  • the terms “ortho”, “meta”, and “para” used in the present invention refer to the substitution positions of all substituents, and the ortho position indicates the position of the substituent immediately adjacent to the compound, for example, when benzene is used, it means 1 or 2 position, and the meta position is the next substitution position of the neighbor substitution position, when benzene as an example stands for 1 or 3 position, and the para position is the next substitution position of the meta position, which means 1 and 4 position when benzene is taken as an example.
  • a more detailed example of the substitution position is as follows, and it can be confirmed that the ortho-, and meta-position are substituted by non-linear type and para-positions are substituted by linear type.
  • the present invention provides an organic electronic element characterized by comprising a first electrode, a second electrode, and an organic material layer formed between the first electrode and the second electrode, wherein the organic material layer comprises an emitting layer, wherein the emitting layer comprises a first host compound represented by Formula 1 as the phosphorescent emitting layer and a second host compound represented by Formula 2.
  • Ar 1 , Ar 2 , Ar 3 , and Ar 4 are each independently selected from the group consisting of a C 6 -C 60 aryl group; a fluorenyl group; a C 2 -C 60 heterocyclic group including at least one hetero atom of O, N, S, Si and a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring; a C 1 -C 50 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 1 -C 30 alkoxyl group; a C 6 -C 30 aryloxy group; and -L′-N(R a )(R b ) (where, L′ may be selected from the group consisting of a single bond; a C 6 -C 60 arylene group; a fluorenylene group; a fused ring group of a C 3 -
  • a is an integer of 0 to 4
  • b is an integer of 0 to 3
  • c and e are integer of 0 to 10
  • d is an integer of 0 to 2
  • R 1 , R 2 , R 3 , R 4 and R 5 may be the same or different, and are each independently selected from the group consisting of deuterium; halogen; a C 6 -C 60 aryl group; a fluorenyl group; a C 2 -C 60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring; a C 1 -C 50 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 1 -C 30 alkoxyl group; a C 6 -C 30 aryloxy group; and -L′-N(R a )(R b ); or in case a, b, c, and e are two or more, and d is 2, and are each in plural and are the same or
  • L 1 and L 2 may be independently selected from the group consisting of a single bond, a C 6 -C 60 arylene group, and a fluorenylene group; a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring; and a C 2 -C 60 heterocyclic group,
  • a and B may be independently a C 6 -C 60 aryl group or a C 2 -C 20 heterocyclic group,
  • a and B are a substituted or unsubstituted C 6 aryl group (phenyl group)
  • d is 2
  • R 4 s are bonded to each other to form a ring to form an aromatic or hetero ring,
  • i and j are independently 0 or 1
  • i+j is 1 or more, and when i or j is 0, it means a direct bond
  • X 1 and X 2 are independently NR′, O, S, or CR′R′′,
  • R′ and R′′ are independently hydrogen; a C 6 -C 60 aryl group; a fluorenyl group; a C 3 -C 60 heterocyclic group; or a C 1 -C 50 alkyl group; R′ and R′′ may be bonded to each other to form a spiro,
  • n is an integer of 1 or 2, when n is 2, two Ar 2 are the same or different, and two Ar 3 are each the same or different.
  • aryl group, fluorenyl group, arylene group, heterocyclic group, fused ring group, alkyl group, alkenyl group, alkoxy group and aryloxy group may be substituted with one or more substituents selected from the group consisting of deuterium; halogen; a silane group substituted or unsubstituted with C 1 -C 20 alkyl group or C 6 -C 20 aryl group; siloxane group; boron group; germanium group; cyano group; nitro group; -L′-N(R a )(R b ); a C 1 -C 20 alkylthio group; C 1 -C 20 alkoxyl group; C 1 -C 20 alkyl group; C 2 -C 20 alkenyl group; C 2 -C 20 alkynyl group; C 6 -C 20 aryl group; C 6 -C 20 aryl group substituted with deuterium; a fluoreny
  • the present invention also provides a compound represented by the Formula 2
  • the first host compound represented by Formula 1 includes a compound represented by Formula 3 or Formula 4 below.
  • R 1 , R 2 , L 1 , Ar 1 , Ar 2 , Ar 3 , a and b are the same as defined above.
  • L 1 and L 2 are selected from the group consisting of the following Formulas (A-1) to (A-12).
  • a′, c′, d′ and e′ are integer of 0 to 4
  • b′ is an integer of 0 to 5
  • f′ and g′ are integer of 0 to 3
  • h′ is an integer of 0 to 1
  • R 6 , R 7 and R 8 are the same or different, and are each independently selected from the group consisting of deuterium; halogen; a C 6 -C 60 aryl group; a fluorenyl group; a C 2 -C 60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring; a C 1 -C 50 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 1 -C 30 alkoxyl group; a C 6 -C 30 aryloxy group; and -L′-N(R a )(R b );
  • f′ and g′ are two or more, they are the same as or different from each other, and plurality of R 6 or plurality of R 7 or plurality of R 8 may be bonded to each other to form an aromatic or a heteroaromatic ring,
  • R 6 and R 7 may be bonded to form an aromatic or heteroaromatic ring
  • Y is NR′, O, S or CR′R′′
  • R′ and R′′ are the same as defined above,
  • Z 1 , Z 2 and Z 3 are independently of each other CR′ or N and at least one is N. ⁇
  • the present invention provides a compound wherein the first host compound represented by the Formula 1 is represented by any one of the following Formulas 5 to 8.
  • R 1 , R 2 , Ar 1 , Ar 2 , Ar 3 , a, b, R′ and R′′ are the same as defined above,
  • R 6 and R 7 are the same or different, and are each independently selected from the group consisting of deuterium; halogen; a C 6 -C 60 aryl group; a fluorenyl group; a C 2 -C 60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring; a C 1 -C 60 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 1 -C 30 alkoxyl group; a C 6 -C 30 aryloxy group; and -L′-N(R a )(R b ); or in case f′ and g′ are two or more, each as plurality are the same as or different from each other, and a plurality of R 6 or a plurality of R 7 or a pluralit
  • a′, c′ and d′ are integer of 0 to 4
  • f′ and g′ are integer of 0 to 3
  • Y is NR′, O, S or CR′R′′. ⁇
  • the present invention also provides an organic electric element wherein the first host compound represented by Formula 1 is represented by any one of Formulas 9 to 20 below.
  • R 1 , R 2 , L 1 , Ar 1 , Ar 2 , Ar 3 , a and b are the same as defined above.
  • the first host compound represented by Formula 1 includes a compound represented by Formula 21 to Formula 22 below.
  • R 1 , R 2 , L 1 , Ar 1 , Ar 2 , Ar 3 , a and b are the same as defined above.
  • the present invention also provides an organic electric element wherein n is 1 in Formula 1 and n is 2 in Formula 2.
  • the present invention provides an organic electric element wherein the first host compound represented by Formula 1 comprises a compound represented by Formula 23 below.
  • R 1 , R 2 , L 1 , Ar 1 , Ar 2 , a, b and n are the same as defined above.
  • f is an integer of 0 to 3
  • g is an integer of 0 to 4
  • R 9 and R 10 are the same or different, and are each independently selected from the group consisting of deuterium; halogen; a C 6 -C 60 aryl group; a fluorenyl group; a C 2 -C 60 heterocyclic group including at least one heteroatom of O, N, S, Si or P; a fused ring group of a C 3 -C 60 aliphatic ring and a C 6 -C 60 aromatic ring; a C 1 -C 50 alkyl group; a C 2 -C 20 alkenyl group; a C 2 -C 20 alkynyl group; a C 1 -C 30 alkoxyl group; a C 6 -C 30 aryloxy group; and -L′-N(R a )(R b ); or in case f and g are two or more, each as plurality are the same as or different from each other, and a plurality of R 9 or a plurality of R 10 or adjacent R 9 and
  • Y is NR′, O, S or CR′R′′
  • the present invention provides an organic electric element wherein the second host compound represented by Formula 2 comprises a compound represented by Formula 24 or Formula 25 below.
  • the present invention also provides an organic electric element comprising a compound wherein A and B in Formula 2 are selected from the group consisting of the following Formulas (B-1) to (B-7).
  • Z 4 to Z 50 are CR′ or N
  • R′ is the same as defined above,
  • R 4 in the Formula 2 includes a compound necessarily forming an aromatic ring or a heteroaromatic ring.
  • the present invention provides a compound wherein the second host compound represented by Formula 2 includes a compound represented by any one of the following Formulas 26 to 45.
  • Ar 4 , X 1 , X 2 , R 3 , R 4 , R 5 , L 2 , c, d, and e are the same as defined above. ⁇
  • the second host compound represented by Formula 2 comprises any one of compounds represented by Formulas 46 to 53 below.
  • R 3 , R 4 , R 5 , Ar 4 , L 2 , c, d, e, A, B, R′ and R′′ are the same as defined above.
  • the first host compound represented by Formula 1 is any one of the following Compounds 1-1 to 1-68 and Compounds 2-1 to 2-68.
  • the second host compound represented by Formula 2 includes any one of the following Compounds 3-1 to 3-86.
  • the organic electric element ( 100 ) includes a first electrode ( 120 ) formed on a substrate ( 110 ), a second electrode ( 180 ), and an organic material layer including the compound represented by Formula 1 between the first electrode ( 120 ) and the second electrode ( 180 ).
  • the first electrode ( 120 ) may be an anode (positive electrode)
  • the second electrode ( 180 ) may be a cathode (negative electrode).
  • the first electrode may be a cathode
  • the second electrode may be an anode.
  • the organic material layer may include a hole injection layer ( 130 ), a hole transport layer ( 140 ), an emitting layer ( 150 ), an electron transport layer ( 160 ), and an electron injection layer ( 170 ) formed in sequence on the first electrode ( 120 ).
  • the remaining layers except the emitting layer ( 150 ) may not be formed.
  • the organic material layer may further include a hole blocking layer, an electron blocking layer, an emitting-auxiliary layer ( 151 ), an electron transport auxiliary layer, a buffer layer ( 141 ), etc., and the electron transport layer ( 160 ) and the like may serve as a hole blocking layer.
  • the organic electric element according to the present invention may further include a protective layer formed on at least one side of the first and second electrodes, which is a side opposite to the organic material layer.
  • the band gap, the electrical characteristics, the interface characteristics, and the like may vary depending on which substituent is bonded at which position, therefore the choice of core and the combination of sub-substituents associated therewith is also very important, and in particular, when the optimal combination of energy levels and T1 values and unique properties of materials (mobility, interfacial characteristics, etc.) of each organic material layer is achieved, a long life span and high efficiency can be achieved at the same time.
  • the organic electroluminescent device may be manufactured using a PVD (physical vapor deposition) method.
  • a metal or a metal oxide having conductivity or an alloy thereof is deposited on a substrate to form a cathode, and the organic material layer including the hole injection layer ( 130 ), the hole transport layer ( 140 ), the emitting layer ( 150 ), the electron transport layer ( 160 ), and the electron injection layer ( 170 ) is formed thereon, and then depositing a material usable as a cathode thereon can manufacture an organic electroluminescent device according to an embodiment of the present invention.
  • an emission auxiliary layer ( 151 ) may be further formed between the hole transport layer ( 140 ) and the emitting layer ( 150 ), and an electron transport auxiliary layer may be further formed between the emitting layer ( 150 ) and the electron transport layer ( 160 ).
  • the present invention may further include a light efficiency enhancing layer formed on at least one of the opposite side to the organic material layer among one side of the first electrode, or one of the opposite side to the organic material layer among one side of the second electrode.
  • the present invention provides the organic electric element wherein the organic material layer is formed by one of a spin coating process, a nozzle printing process, an inkjet printing process, a slot coating process, a dip coating process or a roll-to-roll process, and since the organic material layer according to the present invention can be formed by various methods, the scope of the present invention is not limited by the method of forming the organic material layer.
  • the present invention provides an organic electric element wherein the emitting layer in the organic material layer is a phosphorescent light emitting layer.
  • the compounds represented by Formula 1 and by Formula 2 are mixed in a ratio of any one of 1:9 to 9:1 to be included in the emitting layer of the organic material layer.
  • the compound represented by Formula 1 and by Formula 2 are mixed in a ratio of any one of 1:9 to 5:5 to be included in the emitting layer of the organic material layer.
  • the mixing ratio of the compound represented by the Formula 1 and by the Formula 2 is 2:8 or 3:7 to be included in the emitting layer of the organic material layer.
  • the organic electric element according to an embodiment of the present invention may be a front emission type, a back emission type, or a both-sided emission type, depending on the material used.
  • WOLED White Organic Light Emitting Device
  • R red
  • G green
  • B blue
  • CCM color conversion material
  • the present invention also provides an electronic device comprising a display device including the organic electric element; and a control unit for driving the display device.
  • the present invention provides an electronic device characterized in that the organic electric element is at least one of an OLED, an organic solar cell, an organic photo conductor, an organic transistor and an element for monochromic or white illumination.
  • the electronic device may be a wired/wireless communication terminal which is currently used or will be used in the future, and covers all kinds of electronic devices including a mobile communication terminal such as a cellular phone, a personal digital assistant (PDA), an electronic dictionary, a point-to-multipoint (PMP), a remote controller, a navigation unit, a game player, various kinds of TVs, and various kinds of computers.
  • PDA personal digital assistant
  • PMP point-to-multipoint
  • remote controller a navigation unit
  • game player various kinds of TVs, and various kinds of computers.
  • the final products 1 represented by Formula 1 of the present invention can be synthesized by reaction between Sub 1 and Sub 2 as illustrated in the following Reaction Scheme 1.
  • Sub 2 of reaction scheme 1 can be synthesized by the reaction path of reaction scheme 3 below, but is not limited thereto.
  • Sub 2 examples include, but are not limited to, the followings.
  • the final product 2 represented by Formula 2 of the present invention is prepared by reacting Sub 3 and Sub 4 as shown in Reaction Scheme 4 below.
  • Sub 3 of Reaction Scheme 4 can be synthesized by the reaction path of Reaction Scheme 5 below, but is not limited thereto.
  • Sub 3-4-1 (20 g, 56.3 mmol) and triphenylphosphine (37 g, 141 mmol) were dissolved in o-dichlorobenzene (235 mL) and refluxed for 24 hours. When the reaction was completed, the solvent was removed using reduced pressure distillation. The resulting compound was separated by silicagel column chromatography and recrystallized to obtain Sub 3(1) (13.6 g, 75%).
  • Sub 3-4-2 (20 g, 56.3 mmol), triphenylphosphine (44.28 g, 0.17 mol), o-dichlorobenzene (235 mL) were carried out in the same manner as in Sub 3(1) to give the product Sub 3(2) (12 g, 66%).
  • Sub 3-2-3 (46.1 g, 111 mmol), Sub 3-3 (26.7 g, 131 mmol), K 2 CO 3 (45.6 g, 330 mmol), Pd(PPh 3 ) 4 (7.63 g, 6.6 mmol) were carried out in the same manner as in Sub 3-4-1 to give the product Sub 3-4-3 (29.6 g, 65%).
  • Sub 3-4-3 (20.7 g, 50 mmol), triphenylphosphine (32.7 g, 125 mmol), o-dichlorobenzene (205 mL) were carried out in the same manner as in Sub 3(1) to give the product Sub 3(7) (13.0 g, 68%).
  • Sub 3-1-4 (55.6 g, 160 mmol), bis(pinacolato)diboron (44.7 g, 176 mmol), KOAc (47.1 g, 480 mmol), PdCl 2 (dppf) (3.92 g, 4.8 mmol) were carried out in the same manner as in Sub 3-2-1 to give the product Sub 3-2-4 (47.9 g, 76%).
  • Sub 3-2-4 (43.4 g, 110 mmol), Sub 3-3 (26.7 g, 132 mmol), K 2 CO 3 (45.6 g, 330 mmol), Pd(PPh 3 ) 4 (7.63 g, 6.6 mmol) were carried out in the same manner as in Sub 3-4-1 to give the product Sub 3-4-4 (27.4 g, 64%).
  • Sub 3-1-5 (51.7 g, 160 mmol), bis(pinacolato)diboron (44.7 g, 176 mmol), KOAc (47.1 g, 480 mmol), PdCl 2 (dppf) (3.92 g, 4.8 mmol) were carried out in the same manner as in Sub 3-2-1 to give the product Sub 3-2-5 (46.2 g, 78%).
  • Sub 3-2-5 (40.7 g, 110 mmol), Sub 3-3-1 (33.2 g, 132 mmol), K 2 CO 3 (45.6 g, 330 mmol), Pd(PPh 3 ) 4 (7.62 g, 6.6 mmol) were carried out in the same manner as in Sub 3-4-1 to give the product Sub 3-4-5 (30.6 g, 67%).
  • Sub 3-1-6 (59.6 g, 160 mmol), bis(pinacolato)diboron (44.7 g, 176 mmol), KOAc (47.1 g, 480 mmol), PdCl 2 (dppf) (3.92 g, 4.8 mmol) were carried out in the same manner as in Sub 3-2-1 to give the product Sub 3-2-6 (50.4 g, 75%).
  • Sub 3-2-6 (46.1 g, 110 mmol), Sub 3-3-2 (33.3 g, 132 mmol), K 2 CO 3 (45.6 g, 330 mmol), Pd(PPh 3 ) 4 (7.63 g, 6.6 mmol) were carried out in the same manner as in Sub 3-4-1 to give the product Sub 3-4-6 (32.2 g, 63%).
  • Sub 3-1-7 (47.5 g, 160 mmol), bis(pinacolato)diboron (44.7 g, 176 mmol), KOAc (47.1 g, 480 mmol), PdCl 2 (dppf) (3.92 g, 4.8 mmol) were carried out in the same manner as in Sub 3-2-1 to give the product Sub 3-2-7 (43.0 g, 78%).
  • Sub 3-2-7 (37.9 g, 110 mmol), Sub 3-3-1 (33.3 g, 132 mmol), K 2 CO 3 (45.7 g, 330 mmol), Pd(PPh 3 ) 4 (7.64 g, 6.6 mmol) were carried out in the same manner as in Sub 3-4-1 to give the product Sub 3-4-7 (27.4 g, 64%).
  • Sub 3-1-8 (43.7 g, 160 mmol), bis(pinacolato)diboron (44.7 g, 176 mmol), KOAc (47.1 g, 480 mmol), PdCl 2 (dppf) (3.9 g, 4.8 mmol) were carried out in the same manner as in Sub 3-2-1 to give the product Sub 3-2-8 (38.4 g, 75%).
  • Sub 3-2-8 (35.2 g, 110 mmol), Sub 3-3-3 (39.9 g, 132 mmol), K 2 CO 3 (45.6 g, 330 mmol), Pd(PPh 3 ) 4 (7.6 g, 6.6 mmol) were carried out in the same manner as in Sub 3-4-1 to give the product Sub 3-4-8 (31.5 g, 69%).
  • Sub 3-4-8 (20.8 g, 50 mmol), triphenylphosphine (32.8 g, 125 mmol), o-dichlorobenzene (205 mL) were carried out in the same manner as in Sub 3(1) to give the product Sub 3(66) (12.5 g, 65%).
  • Sub 3 examples include, but are not limited to, the followings.
  • Sub 4 examples include, but are not limited to, the followings.
  • Sub 1+Sub 2 ⁇ Final Products 1 reaction in Reaction Scheme 1 the synthetic reaction of Sub 2 in Reaction Scheme 3, Sub 3+Sub 4 ⁇ Final Products 2 reaction in Reaction Scheme 4 are all based on the Buchwald-Hartwig cross coupling reaction, and Sub 1-3+Sub 1-4 ⁇ Sub 1 reaction in Reaction Scheme 2 and Sub 3-2+Sub 3-3 ⁇ Sub 3-4 in Reaction Scheme 5 are all based on the Suzuki cross-coupling reaction, and Sub 3-4 ⁇ Sub 3 in Reaciton Scheme 5 is based on the PPh3-mediated reductive cyclization reaction (J. Org. Chem. 2005, 70, 5014.) The above reactions will proceed even if a substituent not specifically mentioned is bonded.
  • N 1 -(naphthalen-2-yl)-N 4 ,N 4 -bis(4-(naphthalen-2-yl(phenyl)amino)phenyl)-N 1 -phenyl benzene-1,4-diamine (hereinafter will be abbreviated as 2-TNATA) was vacuum-deposited to form a hole injection layer with a thickness of 60 nm
  • NPB N,N′-bis(1-naphthalenyl)-N,N′-bis-phenyl-(1,1′-biphenyl)-4,4′-diamine
  • a mixture of the compounds represented by the Formulas 1 and 2 as a host in a ratio of 3:7 was used as a host, and as a dopant, a light emitting layer with a thickness of 30 nm was deposited on the hole transport layer by doping (piq) 2 Ir(acac) [bis-(1-phenylisoquinolyl)iridium(III)acetylacetonate] with a weight of 95:5.
  • BAlq (1,1′-bisphenyl)-4-olato)bis(2-methyl-8-quinolinolato)aluminum
  • BAlq was vacuum deposited as a hole blocking layer to a thickness of 10 nm
  • tris(8-quinolinol)aluminum (hereinafter abbreviated as Alq3) was deposited to a thickness of 40 nm as an electron transport layer.
  • Alq3 tris(8-quinolinol)aluminum
  • Alq3 tris(8-quinolinol)aluminum
  • An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the compound represented by Formula 2 was used as a host alone.
  • An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the comparative compound 1 was used as a host alone.
  • An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the comparative compound 2 was used as a host alone.
  • An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the comparative compound 3 was used as a host alone.
  • An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the comparative compound 4 was used as a host alone.
  • An organic electroluminescent device was manufactured in the same manner as in Example 1, except that comparative compound 1 and comparative compound 2 were mixed and used as a host.
  • An organic electroluminescent device was manufactured in the same manner as in Example 1, except that comparative compound 3 and comparative compound 4 were mixed and used as a host.
  • An organic electroluminescent device was manufactured in the same manner as in Example 1, except that the compound represented by the Formula 1 and the comparative compound 4 were mixed and used as a host.
  • Comparative Examples 1 to 7 the compounds of the present invention represented by the Formula 2 and comparative compounds 1 to 4 are used alone as a phosphorescent host, wherein Comparative Examples 1 to 3 using the compounds (3-6, 3-61, and 3-74) of the present invention had higher efficiency and longer life span than Comparative Examples 4 to 7 using the comparative compound.
  • Comparative Example 8 and Comparative Example 9 in which Comparative Compound 1 and Comparative Compound 2 or Comparative Compound 3 and Comparative Compound 4 were mixed and used as a phosphorescent host were found to exhibit higher efficiency than Comparative Examples 1 to 7 using the single substance.
  • Comparative Example 9 using a mixture containing a polycyclic compound having a different heteroatom (N, S) among the 5-membered compounds had higher efficiency than Comparative Example 8 mixed a 5-membered heterocyclic compound having the same nitrogen atom.
  • Comparative Example 10 using a mixture of Compound 2-5 corresponding to Formula 1 and Comparative Compound 3, and Comparative Example 9 using a mixture of Comparative Compound 3 and Comparative Compound 4, when the comparative compound 3 was commonly used and the biscarbazole substance (Comparative Example 9) and Compound 2-5 corresponding to the present invention compound 1 were used as the host material, it was confirmed that Comparative Example 10 using the compound 2-5 exhibited a higher efficiency and a relatively longer life span.
  • Example 1 to 100 using the mixture of the compound of the Formula 1 and the Formula 2 as a host exhibited remarkably high efficiency and long life span and a low driving voltage than the Comparative Example 1 to 10.
  • the inventors of the present invention have found that, in the case of a mixture of the substance of the Formula 1 and the substance of the Formula 2, they have novel characteristics other than those for the respective materials, and have measured the PL lifetime using the substance (1-54) of Formula 1, the substance (3-6) of Formula 2, and the mixture (1-54+3-6) of the present invention as shown in the Table 8.
  • the mixture of the compound of the present invention was measured by fabricating the device in (2:8, 3:7, 4:6, 5:5).

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  • Spectroscopy & Molecular Physics (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Nitrogen Condensed Heterocyclic Rings (AREA)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Oxygen Or Sulfur (AREA)
  • Nitrogen And Oxygen Or Sulfur-Condensed Heterocyclic Ring Systems (AREA)
  • Indole Compounds (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Plural Heterocyclic Compounds (AREA)
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