CN111170974B - 一种主体化合物和使用该化合物的电致发光器件 - Google Patents

一种主体化合物和使用该化合物的电致发光器件 Download PDF

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CN111170974B
CN111170974B CN201911401693.4A CN201911401693A CN111170974B CN 111170974 B CN111170974 B CN 111170974B CN 201911401693 A CN201911401693 A CN 201911401693A CN 111170974 B CN111170974 B CN 111170974B
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organic
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electroluminescent device
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CN111170974A (zh
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赵晓宇
华万鸣
汪华月
高春吉
陈秋
黄娣
钱烨
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Zhejiang Huadisplay Optoelectronics Co Ltd
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Abstract

本发明公开了一种应用于有机电致发光领域的主体化合物和使用该化合物的有机电致发光器件，该有机化合物的分子结构如通式1所示结构。
Figure DDA0002347648450000011
其中，结构式1中，Ar1独立地选自H、取代或未取代的C6‑C60的芳基或杂芳基，其中杂芳基含有选自B、N、O、S、Si及P中至少一个杂原子；X独立的选自O、S、Se、C(R)2、Si(R)2、NR、P(＝O)R或羰基，其中R选自H、CN、C1‑C8烷基、C6‑C60的芳基或杂芳基；A独立地选自取代或未取代的下列结构：
Figure DDA0002347648450000012
其中，R1、R2选自H、C1‑C8的烷基。本发明主体化合物，具有较好的热稳定性，较深的HOMO以及较浅的LUMO可以平衡空穴和电子的传递，能量传递更加充分，能有效提高器件的效率和寿命。

Description

一种主体化合物和使用该化合物的电致发光器件
技术领域
本发明涉及一种有机电致发光领域，具体为一种主体化合物和其使用该化合物的有机电致发光器件。
背景技术
一般的有机发光器件(OLED)是由阴极、阳极及阴极和阳极之间插入的有机物层构成的，器件的组成是透明ITO阳极、空穴注入层(TIL)、空穴传输层(HTL)、发光层(EL、空穴阻挡层(HBL)、电子传输层(ETL)、电子注入层(EIL)、LiAl等阴极形成，按需要可省略1～2有机层。器件的两个电极之间形成电压一边从阴极电子注入另一边阳极注入空穴。这电子和空穴在发光层再结合形成激子，而后发光。有机电致发光器件可以根据需要通过改变发光层的材料来调节发射各种需要的光。
OLED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、薄、色彩丰富、响应速度快，适用温度范围广、低驱动电压、可制作柔性可弯曲与透明的显示面板以及环境友好等独特优点，可以应用在平板显示器和新一代照明上，也可以作为LCD的背光源。
20世纪80年代底发明以来，有机电致发光器件已经在产业上有所应用，比如手机等显示屏幕，但目前的OLED器件由于效率低，使用寿命短等因素制约其更广泛的应用，特别是大屏幕显示器。而制约其广泛应用的最重要一个因素是有机电致发光材料的性能。同时由于OLED器件在施加电压运行时，会产生焦耳热，使得有机材料容易发生结晶，影响器件的寿命和效率，因此，也需要开发稳定高效的有机电致发光材料。
OLED发光分为荧光发光和磷光发光两种方式，根据理论推测，由电荷的在结合而引起的单重激发态与三重激发态的比例为1:3，所以使用小分子荧光材料是，能用于发光的仅为全部能量的25％，其余的75％的能量因三重激发态的非发光机制而损失掉，故一般认为荧光材料的内部量子效率极限为25％。1998年Baldo和Forrest教授等人发现三线态磷光可以在室温下利用，并将原来内量子效率的上限提升到100％，三重态磷光体常常都是重金属原子，组成的络合物，利用重原子效应，强烈的自旋轨域耦合作用造成单重激发态和三重激发态的能阶相互混合，使得原本被禁止的三重态能量缓解以磷光的形式发光，量子效率也随之大幅提升，目前有机OLED组件中的发光层几乎全部使用主客体发光体系机构，即在主发光体中掺杂客体发光材料，一般来说，主体发光的能系需比掺杂物大，即能量由主题传递给客体，使掺杂物被激发而发光。常用的磷光主体材料CBP(4，4′-bis(9-carbazolyl)-biphenyl)具有高效和高三线态能级，当其作为主体材料时，三线态能量能够有效地从发光主体材料转移到客体磷光发光材料。但是由于CBP的空穴易传输而电子难流动的特性，使得发光层的电荷不平衡，结果降低了器件的效率。
本发明化合物不对称的结构特性提高器件效率，热稳定性、成膜等性能，本专利比较相对合成路线简单，本发明缩短反应步骤提高反应收率降低合成成本。本发明的有机化合物应用于OLED器件中的发光层，并当作主体材料使用，本发明有较深的HOMO以及较浅的LUMO可以RD(掺杂剂)的HOMO，LUMO包围在里面，能量传递更加充分；电子和空穴的传递更加平衡，器件的效率和寿命更高。
发明内容
本发明为解决常用OLED器件材料的玻璃化温度较低，材料本身稳定性不高，且在高亮度下具有高效率滚降，阻碍其广泛使用的问题，而提供一种有机化合物、其合成方法及其应用。该有机化合物的分子结构如结构式1所示：
Figure SMS_1
其中，结构式1中，Ar1独立地选自H、取代或未取代的C6-C60的芳基或杂芳基，其中杂芳基含有选自B、N、O、S、Si及P中至少一个杂原子；X独立的选自O、S、Se、C(R)2、Si(R)2、NR、P(＝O)R或羰基，其中R选自H、CN、C1-C8烷基、C6-C60的芳基或杂芳基；A独立地选自取代或未取代的下列结构：
Figure SMS_2
其中，R1、R2选自H、C1-C8的烷基。
优选的，本发明所述有机化合物中Ar1独立地选自H或下列基团：
Figure SMS_3
进一步的，本发明所述有机化合物独立地选自下列化合物：
Figure SMS_4
Figure SMS_5
Figure SMS_6
Figure SMS_7
Figure SMS_8
Figure SMS_9
Figure SMS_10
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Figure SMS_11
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Figure SMS_12
本发明还提供了一种有机电致发光器件，该器件包括阴极层、阳极层和有机层，该有机层包括空穴注入层、空穴传输层、发光层、空穴阻挡层、电CPL层、子注入层或电子传输层中至少一层，其中有机层中至少有一层含有如结构式1所表示的化合物。
其中，结构式1所表示的磷光主体化合物如前所述。
进一步的，结构式1所表示的磷光主体化合物作为有机电致发光器件发光层的主体材料。
进一步的，如结构式1所表示的化合物可以单独使用在有机电致发光器件中，或和其他化合物混合使用；如结构式1所表示的化合物可以使用其中一种化合物，也可以同时使用结构式1中的两种或两种以上化合物；单独使用一种选自结构式1所述的化合物，或同时使用两种以上选自结构式1所述的化合物。
在本发明中，所述发光层可以为红色或绿色发光层。在本发明中采用上述所述的有机电致器件用化合物作为发光层主体材料，可得到高效率、高分辨率、高亮度及长寿命的有机电致器件。
在本发明中，所述有机物层优选包括电子传输层，所述电子传输层包括上述技术方案所述的有机电致器件用化合物。在本发明中，所述电子传输层优选还包括金属化合物。
在本发明中，所述有机物层优选包括发光层和电子传输层，所述发光层和电子传输层均含有上述技术方案所述的有机电致器件用化合物，所述发光层和电子传输层中的有机化合物可以相同也可以不同。
本发明对所述有机电致器件的制备方法没有特殊的限制，除了使用式1的有机电致器件用化合物之外，采用本领域技术人员熟知的发光器件的制备方法和材料制备得到即可。
本发明所述的有机电致器件是有机光伏器件、有机发光器件(OLED)、有机太阳电池(OSC)、电子纸(e-paper)、有机感光体(OPC)、有机薄膜晶体管(OTFT)及有机内存器件(Organic Memory Element)中任意一种。
在本发明中，有机电致器件是可以利用喷溅涂覆法、电子束蒸发、真空蒸镀等方法在基板上蒸镀金属或具有导电性的氧化物以及它们的合金形成阳极；在制备得到的阳极表面按顺序蒸镀空穴注入层、空穴传输层、发光层、空气阻挡层和电子传输层，以后再蒸镀阴极的方法制备。以上方法以外基板上按阴极、有机物层、阳极顺序蒸镀制作有机电致器件。所述有机物层是也可以包括空穴注入层、空穴传输层、发光层、空穴阻挡层及电子传输层等多层结构。在本发明中有机物层是采用高分子材料按溶剂工程(旋转涂膜(spin-coating)、薄带成型(tape-casting)、刮片法(doctor-blading)、丝网印刷(Screen-Printing)、喷墨印刷或热成像(Thermal-Imaging)等)替代蒸镀方法制备，可以减少器件层数。
根据本发明的有机电致器件所使用的材料可以分为顶发射、低发射或双面发射。根据本发明实施方案的有机电致器件的化合物可以有机发光器件类似的原理适用于有机太阳能电池、照明的OLED、柔性OLED、有机感光体，有机薄膜晶体管等电致器件方面。
与现有技术相比，本发明的有益效果是：
1.本发明含有稳定多元环结构，提升了材料机构的稳定性，分子量比较大提高了材料的玻璃化温度，保证了材料长时间蒸镀不被分解；化合物合成方法简单，工艺步骤较少；
2.本发明的有机化合物应用于OLED器件中的发光层，并当作主体材料使用，本发明有较深的HOMO以及较浅的LUMO可以使能量传递更加充分；
3.本发明的有机化合物作为磷光主体材料应用于电致发光器件，具有较大的T1能够阻挡激子扩散，提高器件的效率和寿命；能够平衡空穴和电子的传递，提高器件的寿命。
附图说明
图1为本发明的一种有机电致发光二极管器件结构层图；
其中，110代表基板，120表示阳极，130表示空穴注入层，140表示空穴传输层，150表示发光层，160表示空穴阻挡层，170表示电子传输层，180表示电子注入层，190表示阴极。
具体实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合具体实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
合成例
1.中间体1-1的合成
Figure SMS_13
在氮气氛围下，将1，2-二氯-3-硝基苯：20g、2-甲氧基苯硼酸：15g、四(三苯基膦)钯(0)：
1g、碳酸氢钠：20g、甲苯：160mL、乙醇：80ml、水：80ml投入烧瓶中，进行12小时的加热回流搅拌。冷却至室温(25℃)后，将反应溶液转移至分液漏斗中，用甲苯进行萃取。之后，将有机层用硫酸钠进行干燥，进行过滤、浓缩。将残渣用硅胶柱色谱进行纯化，得到了白色固体23g(产率83％)。根据LC-MS分析，该白色固体鉴定为中间体1-1。LC-MS：M/Z 264.0(M+H)+。
2.中间体1-2的合成:
Figure SMS_14
在氮气氛围下，将中间体1-1：20g、磷酸三乙酯：200mL投入烧瓶中，进行12小时的回流搅拌。冷却至室温(25℃)后，将反应溶液蒸馏进行纯化，得到了白色固体13g(产率74％)。根据LC-MS分析，该白色固体鉴定为中间体1-2。LC-MS：M/Z 232.0(M+H)+。
3.中间体1-3的制备：
Figure SMS_15
将中间体1-2：10g、醋酸：100mL、氢溴酸：20mL投入烧瓶中，进行12小时的搅拌。将反应溶液乙酸乙酯萃取后蒸干溶剂，得到了粗品10g，直接投入下一步反应。根据LC-MS分析，该白色固体鉴定为中间体1-3。LC-MS：M/Z 218.0(M+H)+。
4.中间体1-4的制备：
Figure SMS_16
将中间体1-3：10g、三氟甲磺酸酐：11g、三乙胺：6g、二氯甲烷：100mL投入烧瓶中，进行12小时的搅拌。萃取后，过柱纯化得到白色固体8g。根据LC-MS分析，该白色固体鉴定为中间体1-4。LC-MS：M/Z 349.9(M+H)+。
5.中间体1-5-1的制备：
Figure SMS_17
在氮气氛围下，将中间体1-4：5g、2,2'-联苯二硼酸：3.5g、四(三苯基膦)钯(0)：0.5g、碳酸氢钠：5g、甲苯：50mL、乙醇：25ml、水：25ml投入烧瓶中，进行12小时的加热回流搅拌。冷却至室温(25℃)后，将反应溶液转移至分液漏斗中，用甲苯进行萃取。之后，将有机层用硫酸钠进行干燥，进行过滤、浓缩。将残渣用硅胶柱色谱进行纯化，得到了白色固体1.1g(产率26％)。根据LC-MS分析，该白色固体鉴定为中间体1-5-1。LC-MS：M/Z318.1(M+H)+。
6.中间体1-5-2制备：
Figure SMS_18
在氮气氛围下，将中间体1-4：2g、1,8-二奈硼酸：1.5g、四(三苯基膦)钯(0)：0.2g、碳酸氢钠：2g、甲苯：20mL、乙醇：10ml、水：10ml投入烧瓶中，进行12小时的加热回流搅拌。冷却至室温(25℃)后，将反应溶液转移至分液漏斗中，用甲苯进行萃取。之后，将有机层用硫酸钠进行干燥，进行过滤、浓缩。将残渣用硅胶柱色谱进行纯化，得到了白色固体0.4g(产率24％)。根据LC-MS分析，该白色固体鉴定为中间体1-5-2。LC-MS：M/Z 292.1(M+H)+。
7.中间体2-1制备：
Figure SMS_19
在氮气氛围下，将3-溴-2-碘苯甲酸甲酯：10g、2-氯-5-甲氧基苯硼酸：5.4g、四(三苯基膦)钯(0)：0.5g、碳酸氢钠：5g、甲苯：100mL、乙醇：50ml、水：50ml投入烧瓶中，进行12小时的加热回流搅拌。冷却至室温(25℃)后，将反应溶液转移至分液漏斗中，用甲苯进行萃取。之后，将有机层用硫酸钠进行干燥，进行过滤、浓缩。将残渣用硅胶柱色谱进行纯化，得到了白色固体9g(产率86％)。根据LC-MS分析，该白色固体鉴定为中间体1-1。LC-MS：M/Z356.9(M+H)+。
8.中间体2-2制备：
Figure SMS_20
在三口瓶中加入中间体1-1(7g)，四氢呋喃40毫升，0度低温滴加甲基溴化镁50毫升。升温至40度，反应2小时。滴加2M盐酸40毫升，氯化铵饱和溶液40毫升。加乙酸乙酯200毫升分离有机相，水洗(200毫升*3)三次，旋干备用。
9.中间体2-3制备：
Figure SMS_21
在三口瓶中加入中间体2-2粗品(7g)，二氯乙烷60毫升，磷酸4g。升温至70度，反应过夜。LCMS监测反应，中间体转化完毕后，降温。加二氯甲烷(100毫升)，水洗(200毫升*3)三次后，加甲苯旋干有机相，拌硅胶过柱，得纯品5g。根据LC-MS分析，该白色固体鉴定为中间体2-3。LC-MS：M/Z 338.9(M+H)+。
10.中间体2-4-1制备：
Figure SMS_22
在氮气氛围下，将中间体2-3：2g、2,2'-联苯二硼酸：1.5g、四(三苯基膦)钯(0)：0.2g、碳酸氢钠：2g、甲苯：20mL、乙醇：10ml、水：10ml投入烧瓶中，进行12小时的加热回流搅拌。冷却至室温(25℃)后，将反应溶液转移至分液漏斗中，用甲苯进行萃取。之后，将有机层用硫酸钠进行干燥，进行过滤、浓缩。将残渣用硅胶柱色谱进行纯化，得到了白色固体0.4g(产率18％)。根据LC-MS分析，该白色固体鉴定为中间体2-4-1。LC-MS：M/Z318.1(M+H)+。
11.中间体2-4-2制备：
Figure SMS_23
在氮气氛围下，将中间体2-3：2g、1,8-二苯硼酸：1.5g、四(三苯基膦)钯(0)：0.2g、碳酸氢钠：2g、甲苯：20mL、乙醇：10ml、水：10ml投入烧瓶中，进行12小时的加热回流搅拌。冷却至室温(25℃)后，将反应溶液转移至分液漏斗中，用甲苯进行萃取。之后，将有机层用硫酸钠进行干燥，进行过滤、浓缩。将残渣用硅胶柱色谱进行纯化，得到了白色固体0.5g(产率24％)。根据LC-MS分析，该白色固体鉴定为中间体2-4-2。LC-MS：M/Z349.1(M+H)+。
12.中间体2-5的制备：
中间体2-5-2的制备
Figure SMS_24
将中间体2-4-2(2.0g)，二氯甲烷(20ml)加入反应瓶中，冷却至0－5℃。加入三溴化硼二氯甲烷溶液(1M,15ml)，升温至室温过夜。加水分层，有机相水洗，加入无水硫酸镁干燥。过滤得到滤液进行下步反应。往溶液中加三乙胺(0.6g)，降温至0－5℃,滴加三氯甲磺酸酐(2.3g)。滴加完毕保温反应5小时。反应毕，后处理过硅胶柱得1.2g中间体2-5-2。
中间体中间体2-5-1的制备
Figure SMS_25
中间体2-5-1的制备方法同中间体2-5-2。制备得到1.3g中间体2-5-1。
13.中间体制备2-6的制备：
中间体2-6-2的制备
Figure SMS_26
将中间体2-5-2(1.0g)，无水醋酸钾(0.6g)，连硼酸频那醇酯(0.8g)，二氧六环(20ml)，升温到90-100℃保温反应10小时。加乙酸乙酯萃取，有机相用水洗。浓干后过硅胶柱得0.6g中间体2-6-2。LC-MS：M/Z 445.2(M+H)+。
中间体中间体2-6-1的制备
Figure SMS_27
中间体2-6-1的制备方法同中间体2-6-2。制备得到0.7g中间体2-6-1。LC-MS：M/Z471.2(M+H)+。
14.化合物C-28制备：
Figure SMS_28
将中间体2-6-1(1.0g),2-氯-4-苯基喹唑啉(0.6g),碳酸钾(1.0g)，二氧六环(20ml)，水(4ml)加入反应瓶中。升温回流反应6小时。反应毕，后处理过硅胶柱得C-28重量0.8g,LC-MS：M/Z 549.2(M+H)+。
10、化合物C-1、C-2、C-3、C-14、C-15、C-29、C-30、C-137、C-138、C-151制备化合物C-1、C-2、C-3、C-14、C-15、C-29、C-30、C-137、C-138、C-151制备方法同制备化合物C-28一样，所用的原料为中间体2-6-1和其它卤代物反应，具体如下表：
Figure SMS_29
/>
Figure SMS_30
/>
Figure SMS_31
16、化合物C-113制备：
Figure SMS_32
将中间体1-5-1(1g)，中间体M-1(1.1g)，三(二亚苄基丙酮)二钯(4mol％),三叔丁基膦(8mol％)，叔丁醇钾(0.5g)，和邻二甲苯(30mL)。反应体系升温至120℃,氮气保护下反应12小时。反应完成后,将反应液冷却至室温,用邻二氯苯和水萃取。有机层用无水硫酸镁干燥,浓缩,重结晶所得粗品过硅胶柱得到1.2g，收率61％的C-113。LC-MS：M/Z 625.2(M+H)+。
17、化合物C-114制备：
Figure SMS_33
将中间体1-5-1(1g)，中间体M-2(1.1g)，三(二亚苄基丙酮)二钯(4mol％),三叔丁基膦(8mol％)，叔丁醇钾(0.5g)，和邻二甲苯(30mL)。反应体系升温至120℃,氮气保护下反应12小时。反应完成后,将反应液冷却至室温,用邻二氯苯和水萃取。有机层用无水硫酸镁干燥,浓缩,重结晶所得粗品过硅胶柱得到1.1g，收率61％的C-113。LC-MS：M/Z 611.2(M+H)+。
18.化合物C-123的制备
Figure SMS_34
将中间体1-5-1(1g)，中间体M-3(0.8g)，三(二亚苄基丙酮)二钯(4mol％),三叔丁基膦(8mol％)，叔丁醇钾(0.5g)，和邻二甲苯(30mL)。反应体系升温至120℃,氮气保护下反应12小时。反应完成后,将反应液冷却至室温,用邻二氯苯和水萃取。有机层用无水硫酸镁干燥,浓缩,重结晶所得粗品过硅胶柱得到1.0g，收率61％的C-113。LC-MS：M/Z 522.2(M+H)+。
本发明的有机化合物应用在OLED发光器件中，作为主体材料使用，具有较高的三线态能级，能够提高器件的发光效率和寿命。对本发明部分化合物进行了物理性质的测定，检测结果如下表所示。
Figure SMS_35
注：HOMO由日本日立公司AC2测定，Eg由UVλonset计算得出，S1由发射波峰计算得出，UV是由上海柯祁UV1700紫外可见分光光度计测得，PL由日本岛津发射光谱仪PDA-7000测得。
本发明还通过热蒸镀的方式制备了8个底发光器件(各个具体的器件结构如下：
器件比较实施例：
其制备步骤包括：
a.清洗透明的OLED底发光玻璃基板分别用去离子水、丙酮、异丙醇超声清洗15min，80℃烘干1h，投入蒸镀腔，等离子处理阳极表面；
b.在阳极表面通过热蒸镀的方式蒸镀空穴注入层材料HT1:NDP-9(10nm：0.3)
c.通过热蒸镀的方式蒸镀HT1(1200nm),该层为空穴传输层；
d.在空穴传输层表面蒸镀R Prime(800nm)，该层为发光层和空穴传输层的buffer层；
e.通过热蒸镀的方式蒸镀化合物RH1和RD(40nm:0.3)，该层为发光层；
f.在发光层表面蒸镀HBL1(5nm)，该层为空穴阻挡层；
g.在HBL1层表面蒸镀ET1和LiQ(15nm:15),该层为ETL层；
h.在ETL层表面以热蒸镀方式蒸镀Al(100nm)该层为阴极；
按照上述步骤完成电致发光器件后，测量器件的电流效率和寿命，器件的电流-亮度-电压特性是由带有校正过的分光辐射亮度计的Keithley源测量系统(Keithley2400Sourcemeter)完成的，电致发光光谱是由美国photoresearch公司PR670分光辐射亮度计测量的，所有测量均在室温大气中完成。相关的分子结构如下式所示：
Figure SMS_36
器件实施例：本发明以热蒸镀的方式制备14个底发光器件，其制备步骤同器件比较实施例，仅仅是发光层主体材料分别替换为化合物C-1、C-2、C-3、C-14、C-15、C-28、C-29、C-30、C-113、C-114、C-123、C-137、C-138、C-151；上述器件实施例和比较例的效率、色度坐标等特性显示在下表中。
Figure SMS_37
由上表可知使用本发明主体化合物制作的有机电致发光器件，发光效率可以达41cd/A以上，发光颜色为深红，能成功应用到OLED显示领域。
以上所述，仅为本发明较佳的具体实施方式，但本发明的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本发明揭露的技术范围内，根据本发明的技术方案及其发明构思加以等同替换或改变，都应涵盖在本发明的保护范围之内。

Claims (7)

1.一种应用于有机电致发光领域的主体化合物，该主体化合物的分子结构式为通式1所示结构；
Figure FDA0004227530190000011
其中，结构式1中，Ar1独立地选自H或取代或未取代的C6-C60的芳基或杂芳基，其中杂芳基含有选自B、N、O、S、Si及P中至少一个杂原子；X独立的选自O、S、Se、C(R)2、Si(R)2或P(＝O)R时，其中R选自H、CN、C1-C8烷基、C6-C60的芳基或杂芳基；当X独立的选自NR时，R选自CN、C1-C8烷基、C6-C60的芳基或杂芳基；A独立地选自取代或未取代的下列结构：
Figure FDA0004227530190000012
其中，R1、R2选自H、C1-C8的烷基。
2.根据权利要求1所述的主体化合物，其特征在于：所述有机化合物中Ar1独立地选自H或下列基团：
Figure FDA0004227530190000021
Figure FDA0004227530190000031
3.根据权利要求1所述的有机化合物，其特征在于：所述有机化合物独立地选自下列化合物：
Figure FDA0004227530190000032
Figure FDA0004227530190000041
Figure FDA0004227530190000051
Figure FDA0004227530190000061
Figure FDA0004227530190000071
Figure FDA0004227530190000081
Figure FDA0004227530190000091
Figure FDA0004227530190000101
/>
Figure FDA0004227530190000111
/>
Figure FDA0004227530190000121
4.一种有机电致发光器件，包括阴极层、阳极层和有机层，该有机层包括空穴注入层、空穴传输层、发光层、空穴阻挡层、电子注入层、电子传输层中的至少一层，其特征在于：该器件的有机层中至少有一层含有如权利要求1所述的化合物。
5.根据权利要求4所述的有机电致发光器件，其特征在于，权利要求1所述的化合物在发光层中作为主体材料。
6.根据权利要求4所述的有机电致发光器件，其特征在于，权利要求1所述的化合物可以单独使用，或和其他化合物混合使用。
7.根据权利要求4所述的有机电致发光器件，其特征在于，单独使用一种选自如权利要求3所述主体化合物，或同时使用两种或两种以上选自如权利要求3所述的主体化合物。
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