CN105646595A - 铱配合物及其制备方法和应用该铱配合物的有机电致发光器件 - Google Patents
铱配合物及其制备方法和应用该铱配合物的有机电致发光器件 Download PDFInfo
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- 229910052741 iridium Inorganic materials 0.000 title claims abstract description 52
- GKOZUEZYRPOHIO-UHFFFAOYSA-N iridium atom Chemical compound [Ir] GKOZUEZYRPOHIO-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title claims abstract description 12
- 238000010668 complexation reaction Methods 0.000 title 1
- 239000003446 ligand Substances 0.000 claims abstract description 15
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 claims abstract description 11
- 238000000746 purification Methods 0.000 claims abstract description 4
- 238000000859 sublimation Methods 0.000 claims abstract description 4
- 230000008022 sublimation Effects 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 28
- 238000005401 electroluminescence Methods 0.000 claims description 25
- JUJWROOIHBZHMG-UHFFFAOYSA-N Pyridine Chemical compound C1=CC=NC=C1 JUJWROOIHBZHMG-UHFFFAOYSA-N 0.000 claims description 24
- UMJSCPRVCHMLSP-UHFFFAOYSA-N pyridine Natural products COC1=CC=CN=C1 UMJSCPRVCHMLSP-UHFFFAOYSA-N 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 17
- 229910052757 nitrogen Inorganic materials 0.000 claims description 15
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 14
- 150000001875 compounds Chemical class 0.000 claims description 14
- 125000000623 heterocyclic group Chemical group 0.000 claims description 14
- 125000001424 substituent group Chemical group 0.000 claims description 14
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 12
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 10
- 229910052736 halogen Inorganic materials 0.000 claims description 10
- 150000002367 halogens Chemical class 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 claims description 8
- 125000001188 haloalkyl group Chemical group 0.000 claims description 8
- PQXKHYXIUOZZFA-UHFFFAOYSA-M lithium fluoride Chemical group [Li+].[F-] PQXKHYXIUOZZFA-UHFFFAOYSA-M 0.000 claims description 8
- 125000001624 naphthyl group Chemical group 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
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- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000004440 column chromatography Methods 0.000 claims description 4
- CINYXYWQPZSTOT-UHFFFAOYSA-N 3-[3-[3,5-bis(3-pyridin-3-ylphenyl)phenyl]phenyl]pyridine Chemical group C1=CN=CC(C=2C=C(C=CC=2)C=2C=C(C=C(C=2)C=2C=C(C=CC=2)C=2C=NC=CC=2)C=2C=C(C=CC=2)C=2C=NC=CC=2)=C1 CINYXYWQPZSTOT-UHFFFAOYSA-N 0.000 claims description 3
- ZOKIJILZFXPFTO-UHFFFAOYSA-N 4-methyl-n-[4-[1-[4-(4-methyl-n-(4-methylphenyl)anilino)phenyl]cyclohexyl]phenyl]-n-(4-methylphenyl)aniline Chemical group C1=CC(C)=CC=C1N(C=1C=CC(=CC=1)C1(CCCCC1)C=1C=CC(=CC=1)N(C=1C=CC(C)=CC=1)C=1C=CC(C)=CC=1)C1=CC=C(C)C=C1 ZOKIJILZFXPFTO-UHFFFAOYSA-N 0.000 claims description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- -1 anode Substances 0.000 claims description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 3
- 238000006471 dimerization reaction Methods 0.000 claims description 3
- 239000011521 glass Substances 0.000 claims description 3
- 229910052738 indium Inorganic materials 0.000 claims description 3
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical group [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims description 3
- 229910052760 oxygen Inorganic materials 0.000 claims description 3
- 239000001301 oxygen Substances 0.000 claims description 3
- NKKFHDNJRMWBFS-UHFFFAOYSA-N 1,3-difluoro-2-(trifluoromethyl)benzene Chemical class FC1=CC=CC(F)=C1C(F)(F)F NKKFHDNJRMWBFS-UHFFFAOYSA-N 0.000 claims description 2
- 125000000217 alkyl group Chemical group 0.000 claims description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 125000003118 aryl group Chemical group 0.000 claims description 2
- 229910052794 bromium Inorganic materials 0.000 claims description 2
- 229910052801 chlorine Inorganic materials 0.000 claims description 2
- 239000012043 crude product Substances 0.000 claims description 2
- 230000006837 decompression Effects 0.000 claims description 2
- 238000000605 extraction Methods 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 2
- 230000004044 response Effects 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
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- 239000000126 substance Substances 0.000 abstract description 5
- 238000013461 design Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 150000003222 pyridines Chemical class 0.000 abstract description 2
- 241001025261 Neoraja caerulea Species 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- 238000007385 chemical modification Methods 0.000 abstract 1
- 150000002503 iridium Chemical class 0.000 abstract 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 abstract 1
- 239000010452 phosphate Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 13
- 238000001704 evaporation Methods 0.000 description 6
- HEDRZPFGACZZDS-MICDWDOJSA-N Trichloro(2H)methane Chemical compound [2H]C(Cl)(Cl)Cl HEDRZPFGACZZDS-MICDWDOJSA-N 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
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- IMRWILPUOVGIMU-UHFFFAOYSA-N 2-bromopyridine Chemical compound BrC1=CC=CC=N1 IMRWILPUOVGIMU-UHFFFAOYSA-N 0.000 description 2
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- AFCIMSXHQSIHQW-UHFFFAOYSA-N [O].[P] Chemical compound [O].[P] AFCIMSXHQSIHQW-UHFFFAOYSA-N 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005160 1H NMR spectroscopy Methods 0.000 description 1
- ZNQVEEAIQZEUHB-UHFFFAOYSA-N 2-ethoxyethanol Chemical compound CCOCCO ZNQVEEAIQZEUHB-UHFFFAOYSA-N 0.000 description 1
- 238000004679 31P NMR spectroscopy Methods 0.000 description 1
- 208000019901 Anxiety disease Diseases 0.000 description 1
- AXDSRCARUWJHIO-UHFFFAOYSA-N B(O)O.FC1=CC=CC(=C1C(F)(F)F)F Chemical compound B(O)O.FC1=CC=CC(=C1C(F)(F)F)F AXDSRCARUWJHIO-UHFFFAOYSA-N 0.000 description 1
- GNUYWXZHCXBVGI-UHFFFAOYSA-N B(O)O.FC=1C=CC=C(C1)C(F)(F)F Chemical compound B(O)O.FC=1C=CC=C(C1)C(F)(F)F GNUYWXZHCXBVGI-UHFFFAOYSA-N 0.000 description 1
- WYURNTSHIVDZCO-UHFFFAOYSA-N Tetrahydrofuran Chemical compound C1CCOC1 WYURNTSHIVDZCO-UHFFFAOYSA-N 0.000 description 1
- 239000010405 anode material Substances 0.000 description 1
- 230000036506 anxiety Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229940052810 complex b Drugs 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 238000004770 highest occupied molecular orbital Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004768 lowest unoccupied molecular orbital Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- HOJLDGRYURJOJS-UHFFFAOYSA-N phosphoric acid;pyridine Chemical compound OP(O)(O)=O.C1=CC=NC=C1 HOJLDGRYURJOJS-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
- RIOQSEWOXXDEQQ-UHFFFAOYSA-N triphenylphosphine Chemical compound C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 RIOQSEWOXXDEQQ-UHFFFAOYSA-N 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
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- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F15/00—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table
- C07F15/0006—Compounds containing elements of Groups 8, 9, 10 or 18 of the Periodic Table compounds of the platinum group
- C07F15/0033—Iridium compounds
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- H10K85/30—Coordination compounds
- H10K85/341—Transition metal complexes, e.g. Ru(II)polypyridine complexes
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Abstract
本发明涉及一类铱配合物及其制备方法和应用该铱配合物的有机电致发光器件,该系列铱配合物分子中包括两个苯连吡啶衍生物作为主配体,以及含氮杂环磷酸结构的辅助配体。相比于已经被广泛研究报道的铱配合物,该发明涵盖的这类新型铱配合物不仅具有发光效率高、化学性质稳定、易升华提纯等优点以外,且由于强电子磷酸配位结构的引入,能够有效调控配合物的发光颜色。通过修饰主配体以及辅助配体的分子结构,能够在蓝光波长范围内调节配合物的发光位置,这为有机电致发光显示器以及照明光源的设计生产提供了便利。同时,本发明介绍的一系列新型铱配合物的合成方法简单,产率较高,针对主配体和辅助配体的化学修饰灵活。
Description
【技术领域】
本发明涉及有机电致发光器件技术领域,尤其涉及一类铱配合物及其制备方法和应用该铱配合物的有机电致发光器件。
【背景技术】
在全球能源需求日益增长及生态环境堪忧的大背景下,各国政府相继大力发展基于高科技的可持续节能技术和产业。有机电致发光器件(OLEDs)因其视角广、亮度高、能耗低并可制备柔性器件等诸多优点,而倍受关注,被称为将主宰未来显示世界的关键技术。近年来,大量研究表明,在众多重金属元素配合物中,铱配合物被认为是OLEDs磷光材料的最理想选择。具有5d76s2外层电子结构的铱原子在形成+3价阳离子后,具有5d6电子组态,具有稳定的六配位八面体结构,使材料具有较高的化学稳定性和热稳定性。同时,Ir(III)具有较大的自旋轨道偶合常数(ξ=3909cm-1),有利于提高配合物的内量子产量并降低发光寿命,从而提高发光器件的整体性能。
相比于红光和绿光铱配合物,蓝光发射的能量相对较高,这就要求蓝色磷光铱配合物具有较高的T1能级以及较宽的HOMO/LUMO能级差。研究表明,随着三线态能级的升高,辐射跃迁和非辐射跃迁的速率都会增大,而后者的增大幅度往往更加明显,导致发光效率下降,因此,发射波长的蓝移和高的内量子效率呈矛盾关系,这就给蓝光化合物的开发增加了难度。另外,具有较短发射波长的蓝光化合物,其发光效率都比较低。
因此,有必要提供一种发光效率高的铱配合物。
【发明内容】
本发明的目的在于提供一类以含氮杂环磷酸为辅助配体的蓝光和其他不同颜色发光的铱配合物及其制备方法,含氮杂环磷酸可作为辅助配体制备高效的磷光铱配合物,该类配合物可作为发光中心,应用于有机电致发光器件中。
本发明提供一种铱配合物,其包括一含有两个2,4-二氟-3-三氟甲基苯连吡啶衍生物的主配体和一含氮杂环磷酸的辅助配体,所述主配体中的吡啶衍生物为:其中,R1为烷基、氮取代基或芳基中的任意一种;所述苯基、吡啶基的任意位被卤素和/或C1-C6的卤代烷基取代,所述苯基上取代基的数量为0-4;所述吡啶基上取代基的数量为0-3,其中,含氮杂环磷酸为其中,氮杂环为取代或非取代的吡啶基、嘧啶基或三嗪基中的任意一种,R2为取代或非取代的苯基,萘基、吡啶基、嘧啶基或三嗪基中的任意一种,所述苯基,萘基、吡啶基或嘧啶基的任意位被卤素和/或C1-C6的卤代烷基取代,所述苯基上取代基的数量为0-4;所述吡啶基上取代基的数量为0-3,所述萘基上取代基的数量为0-6,所述嘧啶基上取代基数量为0-2。
优选的,所述卤素为F、Cl、Br、I中的任意一种,所述卤代烷基为单个卤素取代或多个相同或不同卤素取代的C1-C6的卤代烷基。
优选的,所述氮杂环选自:中的任意一种;所述R2选自中的任意一种。
优选的,所述铱配合物具有如下结构之一:
本发明还提供所述铱配合物的制备方法:将含有吡啶衍生物作为配体的铱二聚桥连配合物和含氮杂环磷酸及碳酸钠按摩尔比1:2:5混合后;加入2-乙氧基乙醇溶液,在120℃-150℃下进行加热反应,反应时间16h-36h,冷却至室温,减压蒸馏除去溶剂,用二氯甲烷萃取,浓缩,经柱层析分离,得到以含氮杂环磷酸为辅助配体的铱配合物粗品,配合物经升华提纯,达到能够应用于有机电致发光器件的纯度。
本发明还提供所述铱配合物在制备有机电致发光器件中的应用:一种应用如上所述的任一铱配合物的有机电致发光器件,所述有机电致发光器件包括基片、阳极、空穴传输层、有机发光层、电子传输层和阴极,所述基片为玻璃,所述阳极为铟锡氧,所述空穴传输层为TAPC,所述电子传输层为TmPyPB,所述阴极为氟化锂和铝,所述有机发光层为主体材料和发光材料的掺杂结构,所述主体材料为mCP,所述发光材料为所述铱配合物。
本发明的有益效果:本发明提供的铱配合物具有发光效率高、化学性质稳定、易升华提纯的特点。所述铱配合物的制备方法简单,产率较高。由于极化的磷氧键的引入,配合物的发光颜色和提高电子传输性能能够有效调控;通过修饰主配体以及辅助配体的分子结构,能够在所有可见光波长范围内调节配合物的发光位置,为有机电致发光显示器以及照明光源的设计生产提供了便利。
【附图说明】
图1为本发明提供的铱配合物BIr4-001用于有机电致发光器件的电致发光光谱;
图2为本发明提供的铱配合物BIr4-001用于有机电致发光器件的光电性能;
图3为本发明提供的铱配合物BIr4-001用于有机电致发光器件的光电性能;
图4为本发明提供的铱配合物BIr4-001用于有机电致发光器件的光电性能。
【具体实施方式】
下面结合附图和实施例进一步详细描述本发明。在本发明中所使用的术语,除非另有说明,一般具有本领域普通技术人员通常理的含义。
本发明的铱配合物在合成过程中都用到了三氯化铱、2-溴吡啶、2,4-二氟-3-三氟甲基苯硼酸等,合成方法类似。通过下述实施例将有助于进一步理解本发明,但不限制本发明的内容。
配合物BIr4-001的合成方法
2-溴吡啶(4.17g,26.39mmol)、2,4-二氟-3-三氟甲基苯硼酸(7.16g,31.66mmol)、四三苯基磷钯(0.91g,0.79mmol)和碳酸钠(6.36g,60.00mmol)溶解在100mL四氢呋喃中,65℃反应24小时,冷却,加入水和二氯甲烷,有机层浓缩柱层析得到主配体(3.98g,产率58.18%)。将主配体(3.39g,13.08mmol)和三氯化铱(2.30g,6.23mmol)溶于15mL乙氧基乙醇中,混合物135℃反应12h,然后加入吡啶磷酸(2.72g,12.46mmol)和碳酸钠(3.30g,31.15mmol),继续130℃反应24h。体系冷却,加入水和二氯甲烷,有机层浓缩柱层析得黄色固体BIr4-001(1.70g,产率:29.5%)。
1HNMR(400MHz,CDCl3,δ):9.60(d,J=5.5Hz,1H),8.38(d,J=8.8Hz,1H),8.23(d,J=8.4Hz,1H),7.91(t,J=5.8Hz,1H),7.81–7.73(m,4H),7.42–7.31(m,5H),7.14(td,J=7.5,3.0Hz,2H),6.79(t,J=6.2Hz,1H),6.53–6.39(m,2H),5.76(dd,J=8.8,2.2Hz,1H),5.61(dd,J=8.7,2.2Hz,1H).31PNMR(400MHz,CDCl3,δ):34.21ppm(s).EI,[M]calcdforC33H21F4IrN3O2P,927.07;found927.08.
本发明以含氮杂环磷酸为辅助配体,设计合成了一系列蓝光和其他不同颜色发光的铱配合物。通过设计配体或配合物结构,并通过在配体上简单的化学取代基的修饰,达到调控配合物发光颜色的目的。
所述含氮杂环磷酸的磷氧键以及氮杂环均是具较强电子传输性的基团,有力于平衡载流子的注入与传输,提高发光效率。
所述铱配合物具有较高的内量子产率,经优化验证后,其制备方法简单,且产率较高。
有机电致发光器件的制备
以BIr4-001作为发光材料制备有机电致发光器件。
OLEDs器件的结构包括基片、阳极、空穴传输层、有机发光层、电子传输层和阴极。
在本发明的器件制作中基片为玻璃,阳极材料为铟锡氧(ITO);空穴传输层使用4,4'-环己基二[N,N-二(4-甲基苯基)苯胺(TAPC),电子传输层材料使用3,3'-(5'-(3-(吡啶-3-基)苯基)-[1,1':3',1”-三苯基]-3,3”-二基)二吡啶(TmPyPB),厚度为60nm,蒸镀速率为0.05nm/s;阴极采用LiF/Al,LiF厚度为1nm,蒸镀速率为0.01nm/s,Al厚度为100nm,蒸镀速率为0.2nm/s。有机发光层采用掺杂结构,主体材料是用1,3-二(9H-咔唑-9-基)苯(mCP),所选用的发光材料是BIr4-001。厚度为40nm,蒸镀速率为0.05nm/s,BIr4-001质量分数8%。
本发明中用的几种材料结构如下:
本发明选择一种蓝光配合物制备有机电致发光器件。请一并参阅图1、图2、图3及图4,图1为本发明提供的铱配合物用于有机电致发光器件的电致发光光谱,图2为本发明提供的铱配合物用于有机电致发光器件的光电性能,图3为本发明提供的铱配合物用于有机电致发光器件的光电性能,图4为本发明提供的铱配合物用于有机电致发光器件的光电性能。如图2-图4所示,所述有机电致发光器件的启动电压为9.9V时,其最大功率效率、电流效率和外量子效率分别为26.89lm/W、42.99cd/A和20.1%。有机电致发光器件的外加电压10.0V时,其达到最大亮度32153cd/m2。通过研究光物理性质,表明这类含有氮杂环磷氧结构的辅助配体的磷光铱配合物具有较高的发光效率。
因此,利用含氮杂环磷酸作为第二环金属配体可以有效的合成高发光性能、不同颜色的配合物,并显示良好的器件性能,表明了这类材料在显示和照明等领域具有实际应用价值。
本发明提供的该类磷光材料可作为发光中心应用于磷光OLEDs的发射层,通过设计配体或配合物结构,并通过对所述配体的化学取代基进行修饰,本发明达到了调控配合物发光颜色的目的。
以上所述的仅是本发明的实施方式,在此应当指出,对于本领域的普通技术人员来说,在不脱离本发明创造构思的前提下,还可以做出改进,但这些均属于本发明的保护范围。
Claims (7)
1.一种铱配合物,其特征在于,其包括一含有两个2,4-二氟-3-三氟甲基苯连吡啶衍生物的主配体和一含氮杂环磷酸的辅助配体,所述主配体中的吡啶衍生物为:其中,R1为烷基、氮取代基或芳基中的任意一种;所述苯基、吡啶基的任意位被卤素和/或C1-C6的卤代烷基取代,所述苯基上取代基的数量为0-4;所述吡啶基上取代基的数量为0-3,其中,含氮杂环磷酸为氮杂环为取代或非取代的吡啶基、嘧啶基或三嗪基中的任意一种,R2为取代或非取代的苯基,萘基、吡啶基、嘧啶基或三嗪基中的任意一种,所述苯基,萘基、吡啶基或嘧啶基的任意位被卤素和/或C1-C6的卤代烷基取代,所述苯基上取代基的数量为0-4;所述吡啶基上取代基的数量为0-3,所述萘基上取代基的数量为0-6,所述嘧啶基上取代基数量为0-2。
2.根据权利要求1所述的铱配合物,其特征在于,所述卤素为F、Cl、Br、I中的任意一种或多种,所述卤代烷基为单个卤素取代或多个卤素取代的C1-C6的卤代烷基。
3.根据权利要求2所述的铱配合物,其特征在于,所述氮杂环选自:中的任意一种;所述R2选自或中的任意一种。
4.根据权利要求3所述的铱配合物,其特征在于,所述铱配合物具有如下结构之一:
5.一种铱配合物的制备方法,其特征在于,将含有吡啶衍生物作为配体的铱二聚桥连配合物和含氮杂环磷酸及碳酸钠混合;加入2-乙氧基乙醇溶液,在120℃-150℃下进行加热反应,反应时间16h-36h,冷却至室温,减压蒸馏除去溶剂,再用二氯甲烷萃取,浓缩,经柱层析分离,得到以含氮杂环磷酸为辅助配体的粗品,经升华提纯得到铱配合物。
6.根据权利要求5所述的铱配合物的制备方法,其特征在于,所述铱二聚桥连配合物、含氮杂环磷酸和碳酸钠的摩尔比为1:2:5。
7.一种应用如权利要求1至4中任一所述的铱配合物的有机电致发光器件,其特征在于,所述有机电致发光器件包括基片、阳极、空穴传输层、有机发光层、电子传输层和阴极,所述基片为玻璃,所述阳极为铟锡氧,所述空穴传输层为TAPC,所述电子传输层为TmPyPB,所述阴极为氟化锂和铝,所述有机发光层为主体材料和发光材料的掺杂结构,所述主体材料为mCP,所述发光材料为所述铱配合物。
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