WO2016197731A1 - 有机电致发光器件 - Google Patents

有机电致发光器件 Download PDF

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WO2016197731A1
WO2016197731A1 PCT/CN2016/080319 CN2016080319W WO2016197731A1 WO 2016197731 A1 WO2016197731 A1 WO 2016197731A1 CN 2016080319 W CN2016080319 W CN 2016080319W WO 2016197731 A1 WO2016197731 A1 WO 2016197731A1
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substituted
unsubstituted
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carbon atoms
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李哲
鲁锦鸿
戴雷
蔡丽菲
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广东阿格蕾雅光电材料有限公司
北京阿格蕾雅科技发展有限公司
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Priority to JP2017563534A priority Critical patent/JP6523489B2/ja
Priority to KR1020177033229A priority patent/KR101994468B1/ko
Priority to US15/735,173 priority patent/US20180301637A1/en
Publication of WO2016197731A1 publication Critical patent/WO2016197731A1/zh

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Definitions

  • the invention relates to an organic electroluminescent device and belongs to the field of organic optoelectronics.
  • organic electroluminescent devices As a new type of display technology, organic electroluminescent devices have the advantages of self-luminous, wide viewing angle, low energy consumption, high efficiency, thin thickness, rich color, fast response, and flexible and transparent light-emitting devices.
  • the light-emitting device technology can be applied to applications such as new flat panel displays, surface light sources, and wearable devices, and can also be used as a backlight for LCDs.
  • OLED organic electroluminescent device technology
  • the high-efficiency phosphorescent materials widely used at present require the use of rare precious metals such as ruthenium and platinum, and are costly, which is one of the important factors for the high cost of OLEDs.
  • low-cost, high-stability materials that can fully utilize the triplet energy levels in electrically activated devices, such as compounds with thermal excitation-delayed fluorescence, are a promising solution to the high cost of high-performance OLED materials. one.
  • the organic electroluminescent device of the present invention comprises an anode, a cathode and one or more organic layers, and at least one of the organic layers comprises a material having the following chemical formula (I):
  • D is an electron-donating group containing a nitrogen atom and is one of the following groups:
  • R 1 , R 3 , R 4 are each independently selected from the group consisting of hydrogen H, ⁇ D, fluorine F, chloroCl, bromine Br, iodine I, hydroxy OH, cyanoCN, amino NH 2 , nitro NO 2 , having 1 to a cyclic or non-cyclic alkyl group of 20 carbon atoms, a cyclic or non-cyclic alkoxy group having 1 to 20 carbon atoms, a cyclic or non-cyclic alkylthio group having 1 to 20 carbon atoms, a C6-C40 aryl group having one or more substituents R 5 substituted or unsubstituted, C6-C40 containing one or more substituents R 5 substituted or unsubstituted aromatic hydrocarbon group, C5-C40 containing one or more a substituent R 5 substituted or unsubstituted heteroaryl group containing one or more hetero atoms; two or more groups of the R 2 -R 4 groups may
  • R 2 independently selected from C 6 -C 40 aryl group containing one or more substituents R 5 substituted or unsubstituted, C 6-C40 containing one or more substituents R 5 substituted or unsubstituted aromatic hydrocarbon group, C 5 -C 40 a heteroaryl group containing one or more substituents R 5 substituted or unsubstituted containing one or more hetero atoms;
  • R 5 is selected from the group consisting of fluorine F, chlorine Cl, bromine Br, iodine I, hydroxy OH, cyanoCN, amino NH 2 , nitro NO 2 , a cyclic or non-cyclic alkyl group having 1 to 20 carbon atoms;
  • the hetero atom is B, O, S, Se, N, P.
  • R 1 , R 3 , R 4 are each independently selected from the group consisting of hydrogen H, fluorine F, chlorine chloride, bromine Br, iodine I, hydroxyl OH, cyanoCN, amino NH 2 , nitro NO 2 , having 1 to An alkyl group of 4 carbon atoms, an alkoxy group having 1 to 4 carbon atoms, an alkylthio group having 1 to 4 carbon atoms, and a C6-C25 group having one or more substituents R 5 substituted or unsubstituted An aryl group, a C6-C25 group having one or more substituents R 5 substituted or unsubstituted, and a C5-C25 group having one or more substituents R 5 substituted or unsubstituted containing one or more hetero atoms hetero atom aryl group; R 2 is independently selected from C6-C25 containing one or more substituents R 5 substituted or unsubstituted aryl group, C
  • R 5 is selected from the group consisting of hydrogen H, fluorine F, chlorine Cl, bromine Br, iodine I, hydroxy OH, cyanoCN, amino NH 2 , nitro NO 2 , an alkyl group having 1 to 4 carbon atoms; For O, S, N,
  • Ar is a benzene ring, a naphthalene ring or an anthracene ring which is unsubstituted or has an R 4 substitution.
  • R 1 , R 3 , R 4 are each independently selected from the group consisting of hydrogen H, fluorine F, chlorine chloride, bromine Br, an alkyl group having 1 to 4 carbon atoms, and C6-C25 having one or more substitutions.
  • R 5 group a substituted or unsubstituted aryl group, C6-C25 containing one or more substituents R 5 substituted or unsubstituted aromatic hydrocarbon group, C5-C25 containing one or more substituents R 5 substituted or unsubstituted a hetero atom aryl group containing one or more hetero atoms;
  • R 2 independently selected from a C6-C25 aryl group having one or more substituents R 5 substituted or unsubstituted, and C5-C25 having one or more substituents R 5 substituted or unsubstituted heteroaryl group containing one or more hetero atoms;
  • two or more groups of the R 1 -R 4 groups may be bonded to each other to form a ring;
  • R 5 is selected from the group consisting of hydrogen H, fluorine F, chlorine Cl, bromine Br, an alkyl group having 1 to 4 carbon atoms;
  • the hetero atom is O, S, N.
  • R 1 is selected from an alkyl group having 1 to 4 carbon atoms, a phenyl group, a naphthyl group, an anthracenyl group having one or more substituents R 5 substituted or unsubstituted;
  • R 2 is independently phenyl, naphthyl or anthracenyl group substituted or unsubstituted with one or more substituents R 5 ;
  • R 3 is selected from the group consisting of hydrogen H, fluorine F, chlorine Cl, bromine Br, iodine I, an alkyl group having 1 to 4 carbon atoms, a substituted or unsubstituted phenyl, naphthyl group having one or more substituents R 5 or ⁇ ;
  • R 4 is selected from the group consisting of hydrogen H, fluorine F, chlorine Cl, bromine Br, iodine I, an alkyl group having 1 to 4 carbon atoms, a phenyl group, a naphthyl group;
  • R 5 is selected from hydrogen H, an alkyl group having 1 to 4 carbon atoms.
  • R 1 is selected from an alkyl group having 1 to 4 carbon atoms
  • R 2 is independently phenyl, naphthyl or anthracenyl
  • R 3 is selected from the group consisting of hydrogen H, an alkyl group having 1 to 4 carbon atoms, a phenyl group, a naphthyl group;
  • R 4 is selected from the group consisting of hydrogen H, an alkyl group having 1 to 4 carbon atoms, a phenyl group, and a naphthyl group.
  • the material of formula I is one of the following structures:
  • the one or more organic layers are respectively one or more of a hole injection layer, a hole transport layer, a light emitting layer, a hole blocking layer, and an electron transport layer.
  • the material described in the formula (I) is applied to a hole injection layer, a hole transport layer and/or a light-emitting layer.
  • a single material may be used as one layer, or a plurality of materials may be combined to form a layer.
  • the material described in the formula (I) when used as the light-emitting layer, it may be used as a single light-emitting layer or doped with other materials as the light-emitting layer.
  • the organic layer can be prepared into a film by steaming or spin coating.
  • the compound of the formula (I) of the present invention has a highly stable electron withdrawing group and an electron donating group, there is a stable chemical bond between them, and there is no strong conjugation. These characteristics make the compound of formula (I) have higher fluorescence quantum efficiency and good charge transport capability, and are closer to the international standard dark blue. It can be applied to organic electroluminescent devices to make the device have better illumination. performance.
  • 1 is a structural view of a device of the present invention
  • 10 represents a glass substrate
  • 20 represents an anode ITO
  • 30 represents a hole transport layer
  • 40 represents an electron/exciton blocking layer
  • 50 represents a light emitting layer
  • 60 represents an exciton blocking layer
  • 70 represents an electron transport layer
  • 80 represents an electron injection layer
  • 90 represents a cathode.
  • Example 2 The following are examples of the use of the compounds of the present invention.
  • the transparent conductive ITO glass (the glass substrate 10 with the anode 20) was ultrasonically washed successively with a detergent solution, deionized water, acetone, isopropyl alcohol vapor, and then treated with oxygen plasma for 5 minutes.
  • a light-emitting layer 50 having a thickness of 20 nm was vapor-deposited, and mCP was used as a host material, and the compound 1 of the present invention was used as a dopant material at a doping concentration of 3%.
  • the organic electroluminescent device prepared by the invention emits near-ultraviolet light with an emission wavelength of 416 nm and a color coordinate of (0.17, 0.09).
  • the comparative example uses the compound Cz2BP reported in the document Angew. Chem. Int. Ed. 2014, 53, 6402-6406 instead of the compound 1, and the device structure is identical to that in the literature, and is substantially the same as the device structure in the embodiment 6, except for the host material. And the exciton blocking material adopts DPEPO.
  • the organic electroluminescent device prepared in the comparative example had an emission wavelength of 446 nm and a color coordinate of (0.16, 0.14).
  • the materials of the present invention have color coordinates that are closer to the National Television Standards Committee (NTSC) standard for deep blue light (0.14, 0.08) compared to the reported materials.
  • NSC National Television Standards Committee

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Abstract

一种有机电致发光器件，包括阳极（20），阴极（90）和一层或多层有机层，有机层中至少有一层包含一种具有如下化学式（Ⅰ）的材料。由于化学式（Ⅰ）类型的化合物具有高稳定性的吸电子基团与供电子基团，它们之间具有稳定的化学键，且不存在较强的共轭。这些特点使式Ⅰ类化合物具有较高的荧光量子效率和良好的电荷传输能力，且其发射光谱更接近于国际标准深蓝色，有利于实现更高色纯度的全彩显示器。

Description

有机电致发光器件 技术领域
本发明涉及有机电致发光器件，属于有机光电领域。
背景技术
有机电致发光器件作为一种新型的显示技术，具有自发光、宽视角、低能耗、效率高、厚度薄、色彩丰富、响应速度快、可制作柔性与透明的发光器件等优点，因此有机电致发光器件技术可以应用在新型平板显示器、面光源照明及可穿戴设备等应用领域，也可以作为LCD的背光源。
经过多年的发展，有机电致发光器件技术(OLED)已经达到市场化水平。但目前广泛使用的高效率磷光材料需要用到铱、铂等稀有贵重金属而成本高昂，是OLED成本高居不下的重要因素之一。为了降低OLED材料的成本，开发可以充分利用电激发器件中三线态能级的低成本、高稳定性材料，例如具有热激发延迟荧光的化合物，是有希望解决高性能OLED材料高成本问题的方法之一。
发明内容
本发明的目的在于提供一种使用新材料的有机电致发光器件，该材料可获得更接近国际标准的深蓝色的电致发光器件，有利于实现更高色纯度的全彩显示器。
本发明所述的有机电致发光器件，包含阳极，阴极和一层或多层有机层，有机层中至少有一层包含一种具有如下化学式(I)所述的材料：
Figure PCTCN2016080319-appb-000001
其中，Ar为未取代或者至少有一个R4取代的苯环、萘环、蒽环，n＝0-3；
D为含有氮原子的供电子基团，为以下基团中的一个：
Figure PCTCN2016080319-appb-000002
当D为-N(R2)2时，n不为零；
R1，R3，R4各自独立地选自氢H，氘D，氟F，氯Cl，溴Br，碘I，羟基OH，氰基CN，氨基NH2，硝基NO2，具有1至20个碳原子的成环或不成环的烷基，具有1至20个碳原子的成环或不成环的烷氧基，具有1至20个碳原子的成环或不成环的烷硫基，C6-C40的含一个或者多个取代基R5取代或者未取代的芳基，C6-C40的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C40的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂芳基；R2-R4基团中的两个或多个基团可以互相连接成环；
R2独立选自C6-C40的含一个或者多个取代基R5取代或者未取代的芳基，C6-C40的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C40的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂芳基；
R5选自氟F，氯Cl，溴Br，碘I，羟基OH，氰基CN，氨基NH2，硝基NO2，具有1至20个碳原子的成环或不成环的烷基；
所述杂原子为B，O，S，Se，N，P。
优选地，R1，R3，R4各自独立地选自氢H，氟F，氯Cl，溴Br，碘I，羟基OH，氰基CN，氨基NH2，硝基NO2，具有1至4个碳原子的烷基，具有1至4个碳原子的烷氧基，具有1至4个碳原子的烷硫基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C25的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂原子芳基；R2独立选自C6-C25的含一个或者多个取代基R5取代或者未取代的芳基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C25的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂芳基；R1-R4基团中的两个或多个基团可以互相连接成环；
R5选自氢H，氟F，氯Cl，溴Br，碘I，羟基OH，氰基CN，氨基NH2，硝基NO2，具有1 至4个碳原子的烷基；所述杂原子为O，S，N，
Ar为未取代或有一个R4取代的苯环、萘环、蒽环。
更优选地，R1，R3,R4各自独立地选自氢H，氟F，氯Cl，溴Br，具有1至4个碳原子的烷基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C25的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂原子芳基；R2独立选自C6-C25的含一个或者多个取代基R5取代或者未取代的芳基，C5-C25的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂芳基；R1-R4基团中的两个或多个基团可以互相连接成环；
R5选自氢H，氟F，氯Cl，溴Br，具有1至4个碳原子的烷基；
所述杂原子为O，S，N。
进一步优选：
R1选自具有1至4个碳原子的烷基，含一个或者多个取代基R5取代或者未取代的苯基、萘基、蒽基；
R2独立为含一个或者多个取代基R5取代或者未取代的苯基、萘基或蒽基；
R3选自氢H，氟F，氯Cl，溴Br，碘I，具有1至4个碳原子的烷基，含一个或者多个取代基R5取代或者未取代的苯基、萘基或蒽基；
R4选自氢H，氟F，氯Cl，溴Br，碘I，具有1至4个碳原子的烷基，苯基，萘基；
R5选自氢H，具有1至4个碳原子的烷基。
特别优选：
R1选自具有1至4个碳原子的烷基；
R2独立为苯基、萘基或蒽基；
R3选自氢H，具有1至4个碳原子的烷基，苯基，萘基；
R4选自氢H，具有1至4个碳原子的烷基，苯基，萘基。
式I所述的材料，为下列结构中的一个：
Figure PCTCN2016080319-appb-000003
Figure PCTCN2016080319-appb-000004
Figure PCTCN2016080319-appb-000005
Figure PCTCN2016080319-appb-000006
优选为下列化合物：
Figure PCTCN2016080319-appb-000007
所述一层或多层有机层分别为空穴注入层，空穴传输层，发光层，空穴阻挡层和电子传输层中一种或多层。
所述式(I)所述的材料应用于空穴注入层，空穴传输层和/或发光层中。
所述式(I)所述的材料作为空穴注入材料或者空穴传输材料时，可以单一材料作为一层，也可以多种材料搭配组成一层。
所述式(I)所述的材料作为发光层时，可以作为单一发光层或者掺杂其他材料作为发光层。
所述有机层可以通过蒸渡或旋涂制备成薄膜。
由于本发明的化学式(I)类型的化合物具有高稳定性的吸电子基团与供电子基团，它们之间具有稳定的化学键，且不存在较强的共轭。这些特点使式(I)类化合物具有较高的荧光量子效率和良好的电荷传输能力，且更接近于国际标准深蓝色，应用于有机电致发光器件中，可以使得该器件具有较好的发光性能。
附图说明
图1为本发明的器件结构图，10代表玻璃基板，20代表阳极ITO，30代表为空穴传输层，40代表电子/激子阻挡层，50代表为发光层，60代表为激子阻挡层，70代表为电子传输层，80代表为电子注入层，90代表为阴极。
图2为化合物1的1H-NMR图。
具体实施方式
下面结合实施例对本发明做进一步的详细说明。但不应被视为以任何方式限制本发明。
实施例1：化合物1的合成
Figure PCTCN2016080319-appb-000008
向反应容器中依次加入2g(0.018mol)二甲氨基甲酰氯，20ml四氢呋喃溶剂，对装置进行除氧、通入氮气保护，冷却降温至反应液温度至-75～-65℃，缓慢滴加10ml 1.6Mn-BuLi/THF溶液，控制反应液温度在-75～-65℃，滴加完毕后，继续保持此温度反应0.5-1h。后将6g化合物1-1滴加进去，控制反应液温度在-75～-65℃，滴加完毕后，继续保持此温度反应0.5-1h，后反应液移至室温自然升温反应4-6h，停止反应。加入乙酸乙酯/去离子水萃取，水层再用乙酸乙酯萃取，合并有机层，无水硫酸镁干燥，抽滤，滤液浓缩得到灰白色固体。将得到的固体进行柱层析，得到白色固体粉末3g。
实施例2：下面是本发明化合物的应用实例。
器件结构如图1。器件制备方式：
首先，将透明导电ITO玻璃(带有阳极20的玻璃基板10)依次经洗涤剂溶液、去离子水、丙酮超声清洗，异丙醇蒸汽清洗，再用氧气等离子处理5分钟。
然后，在ITO上蒸镀35nm厚的NPB作为空穴传输层30。
然后，蒸镀5nm厚的mCP作为电子/激子阻挡层40。
然后，蒸镀20nm厚的发光层50，以mCP作为主体材料，本发明的化合物1作为掺杂材料，掺杂浓度为3％。
然后，蒸镀10nm厚的mCP作为激子阻挡层60。
然后，蒸镀30nm厚的TPBi作为电子传输层70。
最后，蒸镀1nm厚的LiF作为电子注入层80和100nm Al作为阴极90。
本发明所制备的有机电致发光器件发射近紫外光，发射波长在416nm,色坐标为(0.17,0.09)。
Figure PCTCN2016080319-appb-000009
比较例
比较例采用文献Angew.Chem.Int.Ed.2014,53,6402–6406中报道的化合物Cz2BP代替化合物1，器件结构与文献中一致，且与实施例6中的器件结构基本相同，除了主体材料及激子阻挡材料采用DPEPO。比较例制备的有机电致发光器件发射波长在446nm,色坐标为(0.16,0.14)。
Figure PCTCN2016080319-appb-000010
因此，本发明的材料相比较已报道材料，具有更加接近于国家电视标准委员会(National Television Standards Committee，NTSC)关于深蓝光的标准(0.14,0.08)的色坐标。

Claims (9)

  1. 有机电致发光器件，包含阳极，阴极和一层或多层有机层，有机层中至少有一层包含一种具有如下化学式(I)所述的材料：
    Figure PCTCN2016080319-appb-100001
    其中，Ar为未取代或者至少有一个R4取代的苯环、萘环、蒽环，n＝0-3；
    D为含有氮原子的供电子基团，为以下基团中的一个：
    Figure PCTCN2016080319-appb-100002
    当D为-N(R2)2时，n不为零；
    R1，R3，R4各自独立地选自氢H，氘D，氟F，氯Cl，溴Br，碘I，羟基OH，氰基CN，氨基NH2，硝基NO2，具有1至20个碳原子的成环或不成环的烷基，具有1至20个碳原子的成环或不成环的烷氧基，具有1至20个碳原子的成环或不成环的烷硫基，C6-C40的含一个或者多个取代基R5取代或者未取代的芳基，C6-C40的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C40的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂芳基；R2-R4基团中的两个或多个基团可以互相连接成环；
    R2独立选自C6-C40的含一个或者多个取代基R5取代或者未取代的芳基，C6-C40的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C40的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂芳基；
    R5选自氟F，氯Cl，溴Br，碘I，羟基OH，氰基CN，氨基NH2，硝基NO2，具有1至20个碳原子的成环或不成环的烷基；
    所述杂原子为B，O，S，Se，N，P。
  2. 根据权利要求1所述的有机电致发光器件，其中R1，R3，R4各自独立地选自氢H，氟F，氯Cl，溴Br，碘I，羟基OH，氰基CN，氨基NH2，硝基NO2，具有1至4个碳原子的烷基，具有1至4个碳原子的烷氧基，具有1至4个碳原子的烷硫基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C25的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂原子芳基；R2独立选自C6-C25的含一个或者多个取代基R5取代或者未取代的芳基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C25的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂芳基；R1-R4基团中的两个或多个基团可以互相连接成环；
    R5选自氢H，氟F，氯Cl，溴Br，碘I，羟基OH，氰基CN，氨基NH2，硝基NO2，具有1至4个碳原子的烷基；所述杂原子为O，S，N，
    Ar为未取代或有一个R4取代的苯环、萘环、蒽环。
  3. 根据权利要求2所述的有机电致发光器件，其中R1，R3,R4各自独立地选自氢H，氟F，氯Cl，溴Br，具有1至4个碳原子的烷基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳基，C6-C25的含一个或者多个取代基R5取代或者未取代的芳烃基，C5-C25的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂原子芳基；R2独立选自C6-C25的含一个或者多个取代基R5取代或者未取代的芳基，C5-C25的含一个或者多个取代基R5取代或者未取代的含有一个或者多个杂原子的杂芳基；R1-R4基团中的两个或多个基团可以互相连接成环；
    R5选自氢H，氟F，氯Cl，溴Br，具有1至4个碳原子的烷基；
    所述杂原子为O，S，N。
  4. 根据权利要求3所述的有机电致发光器件，其中R1选自具有1至4个碳原子的烷基，含一个或者多个取代基R5取代或者未取代的苯基、萘基、蒽基；
    R2独立为含一个或者多个取代基R5取代或者未取代的苯基、萘基或蒽基；
    R3选自氢H，氟F，氯Cl，溴Br，碘I，具有1至4个碳原子的烷基，含一个或者多个取代基R5取代或者未取代的苯基、萘基或蒽基；
    R4选自氢H，氟F，氯Cl，溴Br，碘I，具有1至4个碳原子的烷基，苯基，萘基；
    R5选自氢H，具有1至4个碳原子的烷基。
  5. 根据权利要求4所述的有机电致发光器件，其中R1选自具有1至4个碳原子的烷基；
    R2独立为苯基、萘基或蒽基；
    R3选自氢H，具有1至4个碳原子的烷基，苯基，萘基；
    R4选自氢H，具有1至4个碳原子的烷基，苯基，萘基。
  6. 根据权利要求5所述的有机电致发光器件，所述化学式(I)所述的材料为下列化合物中的一个：
    Figure PCTCN2016080319-appb-100003
    Figure PCTCN2016080319-appb-100004
    Figure PCTCN2016080319-appb-100005
    Figure PCTCN2016080319-appb-100006
  7. 根据权利要求2所述的有机电致发光器件，所述化学式(I)所述的材料为为下列化合物：
    Figure PCTCN2016080319-appb-100007
  8. 根据权利要求1‐7任一所述的有机电致发光器件，所述一层或多层有机层分别为空穴注入层，空穴传输层，发光层，空穴阻挡层和电子传输层中一层或多层。
  9. 根据权利要求8所述的有机电致发光器件，所述式(I)所述的材料作为发光层时，可以作为单一发光层或者掺杂其他材料作为发光层。
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