WO2015085725A1 - 蒽类衍生物及制备方法、应用和有机发光器件 - Google Patents

蒽类衍生物及制备方法、应用和有机发光器件 Download PDF

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WO2015085725A1
WO2015085725A1 PCT/CN2014/078772 CN2014078772W WO2015085725A1 WO 2015085725 A1 WO2015085725 A1 WO 2015085725A1 CN 2014078772 W CN2014078772 W CN 2014078772W WO 2015085725 A1 WO2015085725 A1 WO 2015085725A1
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organic light
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张鹏
马晓宇
王辉
皇甫鲁江
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京东方科技集团股份有限公司
吉林奥来德光电材料股份有限公司
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Definitions

  • Organic electroluminescence generally consists of two opposed electrodes and at least one organic light-emitting compound interposed between the two electrodes. Charge is injected into the organic layer formed between the anode and the cathode to form electron and hole pairs, and the organic compound having fluorescent or phosphorescent characteristics is caused to emit light.
  • the organic electroluminescent device is designed as a multilayer structure because the hole and electron movement speeds are different, and the hole injection layer, the hole transport layer, the electron transport layer, and the electron injection layer are appropriately designed, and the hole and the hole can be improved.
  • the transmission efficiency of electrons equalizes holes and electrons in the device, thereby improving luminous efficiency.
  • the basic structure of an OLED device was a simple structure of an anode (ITO), a hole transport layer (HTL), an emissive layer (EML), and a cathode (Mg: Ag). Subsequently, a hole injection layer such as copper phthalocyanine Cu.Pc, an electron injection layer (LiF), and a cathode (Al: Li) were added. Due to the insertion of a large number of organic layers, the structure of the OLED device becomes complicated and technically increased. However, for production, in order to reduce the number of production steps and improve power efficiency, it is desirable to reduce the number of layers.
  • the inventors of the present invention have studied a novel asymmetric quinone derivative which can be used as a host material, a hole injecting material or a hole transporting material.
  • the anthracene derivative can improve the luminous efficiency and the luminescent brightness, and greatly improve various aspects of the performance of the organic electroluminescent device.
  • Step N3 filtering, washing to obtain the above, the aryl or substituted aryl diboronic acid compound is selected from at least the following
  • the anthracene derivative is used as a fluorescent green host material in the organic electroluminescent device.
  • the anthracene derivatives of the present invention can be used to fabricate organic light-emitting devices.
  • the organic light emitting device includes a first electrode, a second electrode, and one or more organic compound layers interposed between the first electrode and the second electrode, wherein at least one of the organic compound layers includes the germanium Class Derivatization
  • the anthracene derivatives provided by the present invention have high luminous efficiency.
  • the high luminous efficiency indicates that the compound can be used as a luminescent material or a luminescent host material, particularly as a fluorescent host material.
  • the steroid also has a high glass transition temperature and is not easily crystallized, and can be used in an organic electroluminescent device, which exhibits high efficiency, high brightness, long life, and better charge transport capability, thereby prolonging organic electroluminescence.
  • the lifetime of the light emitting device reduces the manufacturing cost of the organic electroluminescent device.
  • the present invention provides an anthraquinone compound, a preparation method and an application thereof, and the present invention will be further described in detail below in order to clarify the object, the technical solution and the effect of the present invention. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
  • the present invention provides an anthraquinone compound represented by the following molecular formula:
  • Step Nh is added to the degassed reaction vessel Solvent
  • Step ⁇ 2 The reaction system is heated to 60 ⁇ to fully react;
  • Step N3 Filter, Wash ⁇ /Get the place
  • the aryl or substituted aryl diboronic acid compound is selected from at least one of the following
  • the temperature in the reactor was raised to 70 ° C, and Pd(PPh 3 ) 4 (0, 35 g, 0.0003 mol) was added thereto, and 100 mL of distilled water was stirred and refluxed for 1 h. After full reaction.
  • Test value is C: 94.76% H: 5.24%
  • test value is C: 94.85%; H: 5, 15%;
  • test value is C: 94.86%; B t 5.14%;
  • test value is C: 94.92%; Hr 5.08%;
  • test value is C : 92.47%; H: 4,91%;
  • the present invention is exemplified by a fluorescent green host material as follows.
  • the following compound a is used as a fluorescent green host material
  • b is used as a fluorescent green doping material
  • 2- ⁇ is used as a hole injecting layer material
  • a-NPD(N,N'dinaphthyl-anthracene, anthracene-diphenylbenzidine As a hole transporting layer material, an organic light-emitting device of the following structure was fabricated to obtain Comparative Sample 1.
  • a 2-nm NATA was vacuum-deposited on the substrate to form a hole injecting layer.
  • a-NPD having a thickness of 30 nm was vacuum-deposited to form a hole transport layer.
  • a compound represented by Chemical Formula a and a compound represented by Chemical Formula b (doping ratio: 3%) having a thickness of 30 nm were vacuum-deposited, and a light-emitting layer having a thickness of 30 nm was formed.
  • An organic light-emitting device was fabricated by vacuum-depositing LiF 0.5 nm (electron injection) and Al 60 nm on the electron transport layer.
  • the wavelength of the display shows that the illuminating color is green.
  • the luminous efficiency and brightness of the samples 1-6 were significantly improved.

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Abstract

本发明公开了一种蒽类衍生物及制备方法、应用和有机发光器件。所述蒽类衍生物由分子结构通式(I)表示。其中,R的结构式为a、b、c、d、e、f中的任一个。使用该蒽类衍生物制造的有机发光器件具有低接通电压、长寿命、高效率和高色纯度的优点。

Description

有机电致发光一般由两个对置的电极和插入在该两个电极之间的至少一 层有机发光化合物组成。 电荷被注入到在阳极和阴极之间形成的有机层中, 以形成电子和空穴对, 使具有荧光或磷光特性的有机化合物产生光发射。
对于有机电致发光材料的研究是从】950年 Bemose对含有有机色素的高 分子薄膜施加高电流电压观测到发光开始的。 1965年, Pope等人首次发现了 蒽单晶的电致发光性质。
为了制作效率高的有机发光器件, 研究者逐渐把器件内有机物层的结构 从单层变为多层结构。 把有机电致发光器件设计为多层结构是由于空穴和电 子的移动速度不同, 适当地设计出空穴注入层、 空穴传输层、 电子传输层及 电子注入层, 可以提高了空穴和电子的传输效率, 使器件中空穴和电子达到 均衡, 从而提高发光效率。
1987年柯达公司的 1¾等人发现, 通过采¾ ΠΌ作为阳极, Mg- Ag合 金作为阴极, 三 (8-羟基喹啉合)铝 (Alq3>作为电子传输材料及发光材料, 三苯 胺衍生物作为空穴传输材料, 具有双层结构的分离功能型有机发光器件 (OLED) 在约 iOV的施加电压下发射约 1000cd/m2强度的光。 该 OLED具 有电子传输材料以及空穴传输材料的堆叠结构, 且与传统单层型器件相比具 有改进的发光特性。 该研究表明, 可以利 有机薄膜发光二极管研发出高亮 度高效率的显示器, 丛而引起世界瞩目, 对 OLED以后的研究起到了重大作 ]¾。
1980年代后,OLED器件的基本结构为阳极 (ITO)、空穴传输层(HTL)、 发光层(EML)、 阴极 (Mg: Ag)的简单结构。 随后加入了空穴注入层, 例如铜 酞菁 Cu.Pc, 电子注入层 (LiF) 以及阴极 (Al: Li) 的研究。 由于大量的有机 层的插入, OLED 器件的结构变得复杂, 技术上增加的了难度。 然而, 对于 生产, 为了降低生产步骤的数量和改善功率效率, 希望减少层的数量。 为了弥补技术的不足, 本发明的发明人研究了一种新型非对称蒽类衍生 物, 可^做主体材料、 空穴注入材料或者空穴传输材料。 该蒽类衍生物可以 提高发光效率和发光亮度,丛而极大的改善有机电致发光器件的各方面性能。
本发明的技术方案如下:
一种蒽类衍生物, 由如下分子通式表示:
Figure imgf000004_0001
a c d e f
化合物, 具体地, 分别由如下化学结构式表示;
Figure imgf000005_0001
Figure imgf000006_0001
步骤 N3 : 过滤, 洗涤得到所述的 中, 所述芳基或取代芳基二硼酸化合物选自如下至少
Figure imgf000006_0002
Figure imgf000006_0003
用作有机电致发光器件中的荧光主体材料、
Figure imgf000006_0004
具悻地, 所述蒽类衍生物在所述有机电致发光器件中用作荧光绿色主钵 材料。
本发明所述的蒽类衍生物可以用于制作有机发光器件。 该有机发光器件 包括第一电极、 第二电极以及置于所述第一电极、 所述第二电极之间的一个 或多个有机化合物层, 其中, 至少一个所述有机化合物层包含所述蒽类衍生 本发明提供的蒽类衍生物具有高的发光效率。 高的发光效率表明该化合 物可作为发光材料或发光主体材料, 尤其是可以作为荧光主体材料。 该蒽类 生物还具有高的玻璃化温度并且不易结晶,可以用于有机电致发光器件中, 其表现出高效率、 高亮度、 长寿命且更好的电荷传输能力, 从而延长了有机 电致发光器件的寿命, 降低了有机电致发光器件的制造成本。 本发明提供了一种蒽类化合物、制备方法及其应用,为使本发明的目的、 技术方案及效果更加清楚、明确, 以下对本发明进一步详细说明。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^于限定本发明。
本发明提供了一种蒽类化合物, 由如下分子通式表示:
Figure imgf000007_0001
d f
_t述蒽 具体地, 由分别 001-006化学结构式表
Figure imgf000008_0001
步骤 Nh 向脱气后的反应容器中加入
Figure imgf000009_0001
溶剂
步骤 Ν2 : 将反应体系升温至 60Ό充分反应; 3
步骤 N3 : 过滤, 洗涤\/得到所
具体地, 所述芳基或取代芳基二硼酸化合物选自如下至少一种
Figure imgf000009_0002
对苯二甲
Figure imgf000009_0003
Figure imgf000009_0004
氮气保护下向 2L反应釜中加入化合物 [1 2](86g, 0.21mol), NBS CN- 溴代丁二 t亚胺) (49.83g, 0.28mo1), DMF (Ν,Ν二甲基甲酰胺) 11。
温度升至 60Ό后搅拌反应 16h。 用薄膜色谱 (TLC) 方法确认反应 结束后。
减压过滤, 用 500mL丙酮悬浮换流搅拌。减压过滤后得到淡绿色固 体目标化合物 [1 1] 85.7g, 产率 83%。
在氮气保护下向 2L反应釜中加入化合物 [1 l](29.7g, 0,066mol), 对 苯二硼酸 (4,97g, 0.03moi), K2C03 (9.12g, 0.066mol), 甲苯 200mL搅拌。
反应釜内温度升到 70°C, 加入 Pd(PPh3)4 (0,35g, 0.0003mol), 蒸馏 水 100mL, 搅拌回流〗lh。 充分反应后。
加入 70mL蒸镏水中止反应后, 减压过滤, 用蒸镏水洗涤固体, 然 后用丙酮, 甲苯, THF来重结晶, 得到固体后再升华, 甲苯重结晶, 得 到乳白色固体目标化合物 001 18.36g, 产率 69%。
按照以上实例方法合成
Figure imgf000010_0001
001〜006的化合物(其中,用
Figure imgf000010_0002
分别替 代对苯二硼酸合成 001〜006的化合物) , 结果列于表 i中:
化合物 MS/FAB(M
.ti 口. 元素分析
+) 计算值为 C: 94.77%: R 5,23%
001 887.11
测试值为 C: 94.76% H: 5.24%
002 计算值为 C: 94,63%; H: 5.37% 901,14 测试值为 C : 94.62%: R: 5,38%;
计算值为 C : 94.84%; Η · 5, 16%;
003 937, 17
测试值为 C : 94.85%; H: 5, 15%;
计算值为 C : 94.88%; 5, 12%;
004 1063.33
测试值为 C : 94.86%; B t 5.14%;
计算值为 C : 94.90%; H: 5, 10%;
005 987.23
测试值为 C: 94.92%; Hr 5.08%;
计算值为 C : 94.77%; H : 5.23%;
006 963.21
测试值为 C : 92.47%; H : 4,91%;
通过下面的实例更详细的说明本发明。 但是, 下面的实例只是为了更加 具体的说明本发明而已, 本发明的范園不只限定于实例。 下面的实例在本发 明范围内根据使 ffi者可以修正, 变更。
具体的, 本发明以荧光绿色主体材料为例说明如下。
比较例 1
下面化合物 a 用作荧光绿色主体材料, b 作为荧光绿色掺杂材料, 2-ΤΝΑΤΆ作为空穴注入层材料, a- NPD(N,N'二萘基 - Ν,Ν'-二苯基联苯胺)作 为空穴传输层 料使用, 制作下面结构的有机发光器件得到对比样品 1。
ΠΌΖ2 TNATA(80nm) NPD(30mn)/ 化 合 物 a+ 化 合 物 b(30nm) /Alq3(30nm)/LiF(0, 5nm)/Al(60nm)的结构的有机发光器件。
Coming ( 康 宁 ) 公 司 15Ω/αη2 (1000 A) ITO 玻 璃 基 板 50mm*50mm*0.7mm大小切断后在丙酮, 异丙醇, 纯水中各在微波中洗净 15 分钟, 在 UV 中再洗 30 分钟后使用。 在基板上面真空蒸镀 80 nm厚度的 2-TNATA ,形成空穴注入层。空穴注入层上面真空蒸镀 30nm厚度的 a- NPD , 形成了空穴输送层。 空穴输送层上面真空蒸鍍 30nm厚度的化学式 a表示的 化合物和化学式 b表示的化合物 (掺杂率 3%), 形成了 30nm厚的发光层。 电子输送层上面一次真空蒸鍍 LiF 0.5nm (电子注入)和 Al 60nm制作了有机发 光器件。
Figure imgf000012_0001
化合物 a 化合物 b
实施例 1〜6:
上面比较例 1 中作为发光层荧光主体化合物 a用化合物 00】〜006 之一代替 , 除此外其他采用 的是 比较例 1 中 同样的方法 ΓΤΌ/2- TN ATA(80nm)/ot- NPD(3 Onm)/ [荧光绿色主体化合物 001〜 006 中 一种 ]/b(3%)/(30nm)ZAlq3(30nm)/LiF(0,5nm)/Al(60nm)的结构的有机发光 测量比较样品 1 以及样品 1〜6的发光性能
采用 Kdthley SMU235, PR650评价驱动电压,发光亮度,发光效率, 发光颜色。 对对比样品 1 以及样品 1〜6进行同样试验。 结果列于表 2
Figure imgf000012_0002
根据表 2 所表示, 样品 1 6 与比较样品 〗 比较, 上述 ^
516〜524Π ΠΊ波长范围内显示发光颜色为绿色。 样品 1-6的发光效率及发 光亮度得到了明显的提高。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领域的普 11
Figure imgf000013_0001

Claims

种蒽类衍生物, 由如下分子结构通式表示 :
Figure imgf000014_0001
其中, R选自碳原子数为 6〜32的芳基或取代芳基。
2、如权利要求 1所述的蒽类衍生物,其特征在于, R选自由下述 a、 、 c、 d、 e、 f所示中的任一种:
Figure imgf000014_0002
Figure imgf000014_0003
Figure imgf000015_0001
4、权利要求 1 -3中任一所述的蒽类衍生物在有机电致发光器件中的 应用, 其特征在于, 所述的蒽类衍生物在所述有机电致发光器件中用作 荧光主体材料、 空穴注入材料或者空穴传输材料。
5、 如权利要求 5 所述的应用, 其特征在于, 所述的蒽类衍生物在 所述有机电致发光器件中用作荧光绿色主体材料。
6、 一种有机发光器件, 包括第一电极、 第二电极和置于所述两电 极之间的一个或多个有机化合物层, 其特征在于, 至少一个有机化合物 层包含权利要求 1〜3中任一项所述的蒽类衍生物。
7、权利要求 1 -3中任一所述的蒽类衍生物的制备方法, 其包括如下 歩骤 SI: 向脱气后的反应容器中加入 、 芳基或取代芳 基二硼酸化合物、 碳酸钾、 甲苯; 歩骤 S2: 反应容器升温至 70Ό, 加入催化剂, 回流, 充分反应;
Figure imgf000016_0001
8、 如权利要求 7 所述的制备方法, 其特征在于, 所述步骤 S1
Figure imgf000016_0002
的制备方法包括如下步骤: 步骤 N1: 、
0严、
中加入 、 溶剂;
^骤: 2: 将反应体系升温至 60Ό充分反应
步骤 N3: 过滤, 洗涤得到所述的 9. 如权利要求 7所述的制备方法
Figure imgf000016_0003
基二硼酸化合物选自如下至少一种:
对苯二甲酸
Figure imgf000016_0004
Figure imgf000016_0005
U
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