新型N-杂化类双极性主体材料的制备及性能表征
发布时间：2019-02-13 02:32
【摘要】：本文设计并合成了一系列具有高三线态能级、成膜能力好、载流子传输平衡性好,适合溶液法加工制备的小分子磷光主体材料,并且应用于有机电致发光器件,对材料的光电转换特性进行了分析。具体来说,包括以下三个方面的研究内容:(1)吡啶核-三苯胺臂类磷光主体材料的制备及性能研究:首先,我们通过C-N偶联反应在芴骨架上引入吡啶基团,作为分子的构建核;同时为改善空穴的注入和传输,我们引入三芳基胺或咔唑基团作为臂,共计合成了四种双极性主体材料,PyDFDPA、PyDFPNA、PyDFPPA和PyDFCz。将这四种材料作为主体,掺杂相应的磷光客体分子,通过简单的溶液法制备工艺,得到了蓝色、绿色和橙色磷光器件。其中,PyDFPPA单一主体蓝光器件,效率达到18.5 cd/A。PyDFPNA混合主体橙色磷光器件也显示了很高的效率,在3000至30000cd/m2的高亮度范围内,具有37.3 cd/A的最大发光效率,是溶液法制备单一发光层器件中最有效的橙光器件之一。此外,在该系列器件中,效率滚降得到了很好的抑制,特别是绿色和橙色磷光器件,在10000 cd/m2的高亮度下,其效率滚降值仅为2.94%和3.21%。(2)4,5-二氮代芴类电子受体材料的制备及光性能研究:我们设计了四种4,5-二氮代芴类电子受体材料。其中以DTPANF-OH为臂,分别与三苯胺、咔唑以及并二噻吩,通过傅克反应得到三种氮杂物芴类材料DTPANF-Cz、DTPANF-TPA、DTPANF-TT。为了增加目标分子的溶解性,我们又设计了一种以DCzNF-OH为臂、以吩VA嗪作为核的化合物DCzNF-POA。这四种化合物均表现了非常高的玻璃化转变温度,分别为211℃(DTPANF-Cz)、210℃(DTPANF-TPA)、209℃(DTPANF-TT)和215℃(DCzNF-POA)。此外,该类化合物具有优异的成膜能力,均方根粗糙度分别为0.48 nm(DTPANF-Cz)、0.38 nm(DTPANF-TPA)、0.73nm(DTPANF-TT)和0.47 nm(DCzNF-POA)。(3)二苯砜类热活化延迟荧光材料的制备及光性能研究:我们通过简单的合成方案,制备了三种二苯砜类热活化延迟荧光材料,分别是m-CzSO、p-CzSO以及3-CzSO。该系列分子以二苯基亚砜作为受体单元,咔唑作为给体单元,具有典型的D-A-D结构。三线态能级分别为2.87eV(m-CzSO)、2.59 eV(p-CzSO)以及2.60 eV(3-CzSO)。此外,该类化合物具有较好的成膜能力,均方根粗糙度分别为0.57 nm(m-CzSO)、0.56 nm(p-CzSO)和0.45 nm(3-Cz SO)。
[Abstract]:In this paper, a series of small molecular phosphorescence materials with high three-wire energy levels, good film forming ability, good carrier transport equilibrium, and suitable for solution processing are designed and synthesized, and used in organic electroluminescent devices. The photoelectric conversion characteristics of the materials are analyzed. Specifically, it includes the following three aspects: (1) preparation and performance study of pyridine nucleus-trianiline arm phosphor. Firstly, we introduce pyridine group into fluorene skeleton by C-N coupling reaction. Nuclear construction as a molecule; In order to improve the hole injection and transport, four kinds of bipolar host materials, PyDFDPA,PyDFPNA,PyDFPPA and PyDFCz., were synthesized by using triaryl amines or carbazole groups as arms. The blue green and orange phosphorescence devices were obtained by using these four materials as the host and doping the corresponding phosphorescent guest molecules by a simple solution method. Among them, PyDFPPA single main body blue light device, the efficiency reaches 18.5 cd/A.PyDFPNA mixed main orange phosphorescence device also shows very high efficiency, in the high brightness range from 3000 to 30000cd/m2, the maximum luminescence efficiency of 37.3 cd/A is obtained. It is one of the most effective orange light devices in the preparation of single luminescent layer devices by solution method. In addition, in this series of devices, the efficiency rollout is well suppressed, especially for green and orange phosphorescence devices with high brightness of 10000 cd/m2. (2) the preparation and optical properties of 4N 5 diazofluorene electron receptor materials: we have designed four kinds of 4N 5 diazofluorene electron receptor materials. Using DTPANF-OH as arm and trianiline, carbazole and dithiophene respectively, three kinds of nitrogen-fluorene materials DTPANF-Cz,DTPANF-TPA,DTPANF-TT. were obtained by Fourier reaction. In order to increase the solubility of the target molecule, we also designed a compound DCzNF-POA. with DCzNF-OH as the arm and phenophene VA as the nucleus. The four compounds exhibit very high glass transition temperatures of 211 鈩，
本文编号：2421077
[Abstract]:In this paper, a series of small molecular phosphorescence materials with high three-wire energy levels, good film forming ability, good carrier transport equilibrium, and suitable for solution processing are designed and synthesized, and used in organic electroluminescent devices. The photoelectric conversion characteristics of the materials are analyzed. Specifically, it includes the following three aspects: (1) preparation and performance study of pyridine nucleus-trianiline arm phosphor. Firstly, we introduce pyridine group into fluorene skeleton by C-N coupling reaction. Nuclear construction as a molecule; In order to improve the hole injection and transport, four kinds of bipolar host materials, PyDFDPA,PyDFPNA,PyDFPPA and PyDFCz., were synthesized by using triaryl amines or carbazole groups as arms. The blue green and orange phosphorescence devices were obtained by using these four materials as the host and doping the corresponding phosphorescent guest molecules by a simple solution method. Among them, PyDFPPA single main body blue light device, the efficiency reaches 18.5 cd/A.PyDFPNA mixed main orange phosphorescence device also shows very high efficiency, in the high brightness range from 3000 to 30000cd/m2, the maximum luminescence efficiency of 37.3 cd/A is obtained. It is one of the most effective orange light devices in the preparation of single luminescent layer devices by solution method. In addition, in this series of devices, the efficiency rollout is well suppressed, especially for green and orange phosphorescence devices with high brightness of 10000 cd/m2. (2) the preparation and optical properties of 4N 5 diazofluorene electron receptor materials: we have designed four kinds of 4N 5 diazofluorene electron receptor materials. Using DTPANF-OH as arm and trianiline, carbazole and dithiophene respectively, three kinds of nitrogen-fluorene materials DTPANF-Cz,DTPANF-TPA,DTPANF-TT. were obtained by Fourier reaction. In order to increase the solubility of the target molecule, we also designed a compound DCzNF-POA. with DCzNF-OH as the arm and phenophene VA as the nucleus. The four compounds exhibit very high glass transition temperatures of 211 鈩，
本文编号：2421077
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