新型N-雜化類雙極性主體材料的制備及性能表征
發(fā)布時(shí)間：2019-02-13 02:32
【摘要】：本文設(shè)計(jì)并合成了一系列具有高三線態(tài)能級(jí)、成膜能力好、載流子傳輸平衡性好,適合溶液法加工制備的小分子磷光主體材料,并且應(yīng)用于有機(jī)電致發(fā)光器件,對(duì)材料的光電轉(zhuǎn)換特性進(jìn)行了分析。具體來說,包括以下三個(gè)方面的研究?jī)?nèi)容:(1)吡啶核-三苯胺臂類磷光主體材料的制備及性能研究:首先,我們通過C-N偶聯(lián)反應(yīng)在芴骨架上引入吡啶基團(tuán),作為分子的構(gòu)建核;同時(shí)為改善空穴的注入和傳輸,我們引入三芳基胺或咔唑基團(tuán)作為臂,共計(jì)合成了四種雙極性主體材料,PyDFDPA、PyDFPNA、PyDFPPA和PyDFCz。將這四種材料作為主體,摻雜相應(yīng)的磷光客體分子,通過簡(jiǎn)單的溶液法制備工藝,得到了藍(lán)色、綠色和橙色磷光器件。其中,PyDFPPA單一主體藍(lán)光器件,效率達(dá)到18.5 cd/A。PyDFPNA混合主體橙色磷光器件也顯示了很高的效率,在3000至30000cd/m2的高亮度范圍內(nèi),具有37.3 cd/A的最大發(fā)光效率,是溶液法制備單一發(fā)光層器件中最有效的橙光器件之一。此外,在該系列器件中,效率滾降得到了很好的抑制,特別是綠色和橙色磷光器件,在10000 cd/m2的高亮度下,其效率滾降值僅為2.94%和3.21%。(2)4,5-二氮代芴類電子受體材料的制備及光性能研究:我們?cè)O(shè)計(jì)了四種4,5-二氮代芴類電子受體材料。其中以DTPANF-OH為臂,分別與三苯胺、咔唑以及并二噻吩,通過傅克反應(yīng)得到三種氮雜物芴類材料DTPANF-Cz、DTPANF-TPA、DTPANF-TT。為了增加目標(biāo)分子的溶解性,我們又設(shè)計(jì)了一種以DCzNF-OH為臂、以吩VA嗪作為核的化合物DCzNF-POA。這四種化合物均表現(xiàn)了非常高的玻璃化轉(zhuǎn)變溫度,分別為211℃(DTPANF-Cz)、210℃(DTPANF-TPA)、209℃(DTPANF-TT)和215℃(DCzNF-POA)。此外,該類化合物具有優(yōu)異的成膜能力,均方根粗糙度分別為0.48 nm(DTPANF-Cz)、0.38 nm(DTPANF-TPA)、0.73nm(DTPANF-TT)和0.47 nm(DCzNF-POA)。(3)二苯砜類熱活化延遲熒光材料的制備及光性能研究:我們通過簡(jiǎn)單的合成方案,制備了三種二苯砜類熱活化延遲熒光材料,分別是m-CzSO、p-CzSO以及3-CzSO。該系列分子以二苯基亞砜作為受體單元,咔唑作為給體單元,具有典型的D-A-D結(jié)構(gòu)。三線態(tài)能級(jí)分別為2.87eV(m-CzSO)、2.59 eV(p-CzSO)以及2.60 eV(3-CzSO)。此外,該類化合物具有較好的成膜能力,均方根粗糙度分別為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，
本文編號(hào)：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，
本文編號(hào)：2421077
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