本文選題：近紅外　切入點：有機電致發(fā)光二極管　出處：《鄭州大學》2015年碩士論文

【摘要】：近年來,近紅外有機電致發(fā)光二極管(OLED)引起了人們越來越大的興趣,在近紅外OLED器件中給體-受體-給體(D-A-D)型發(fā)色團是一類最重要的NIR材料。因此,本文選用富電子的咔唑、吩噻嗪、三苯胺等衍生物作為電子給體,缺電子的苯并噻二唑和苯并硒二唑衍生物作為電子受體,通過SUZUKI偶聯(lián)反應合成了一系列D-A-D型NIR發(fā)光材料并對其進行表征。最后,我們將目標產(chǎn)物旋涂在ITO上作為活性發(fā)光層制備了一系列電致發(fā)光器件并測試了其發(fā)光性能。在分子設計中,本文首先在給體中引入柔性鏈對目標產(chǎn)物的溶解性進行調(diào)控;其次通過改變給體和受體對目標產(chǎn)物的帶隙進行調(diào)控,最終使得吸收和發(fā)射波長紅移至近紅外光區(qū)。采用1H-NMR、IR、EA等分析方法對NIR發(fā)光材料的結(jié)構(gòu)進行分析;通過TG、DSC等對其熱穩(wěn)定性進行分析,結(jié)果表明,這五個目標產(chǎn)物的分解溫度均在350℃以上,都具有良好的熱穩(wěn)定性;通過UV-vis對其溶液的吸收性能進行分析,它們的最大吸收波長在505-575 nm范圍內(nèi),計算得它們的能帶隙在2.09-1.80 e V范圍內(nèi),說明這五個目標產(chǎn)物都具有較小的能帶隙;通過FL對其THF溶液的熒光發(fā)射性能進行分析,它們的最大發(fā)射波長在668-756 nm范圍內(nèi);通過EL對其電致發(fā)光性能進行分析,發(fā)現(xiàn)它們的OLED器件的發(fā)射波長在675-802 nm范圍內(nèi),最終移至近紅外光區(qū)。結(jié)果表明,在分子結(jié)構(gòu)中引入噻吩基團或者將S原子換成Se原子都可以使得吸收波長和發(fā)射波長紅移,并且減少能帶隙。本文最后又以三苯胺(TPA)為核、苯并三氮唑(BTz)為支鏈通過SUZUKI偶聯(lián)反應合成了一種超支化共軛聚合物HPTPA-BTz及其模型化合物TPA-BTz,并通過1H-NMR、IR、凝膠滲透色譜(GPC)等對其結(jié)構(gòu)和分子量進行表征。所得聚合物的Mn為0.46×104,Mw為1.26×104。測定了HPTPA-BTz和TPA-BTz在THF溶劑中的UV-vis、FL及其熒光壽命,它們在THF溶劑中的熒光發(fā)射峰均為524nm,HPTPA-BTz和TPA-BTz的熒光壽命分別為3.08ns、4.70ns。最后探討了該聚合物的電致發(fā)光性能,其OLED器件的發(fā)射波長為523nm。
[Abstract]:In recent years, the near infrared organic light-emitting diode (Ole) has attracted more and more attention. In the near infrared OLED devices, donor-receptor-donor D-A-D) chromophore is the most important kind of NIR material. A series of NIR luminescent materials of D-A-D type were synthesized and characterized by SUZUKI coupling reaction, using phenothiazine, trianiline and other derivatives as electron donors and benzoxadiazole and benzoselenediazole derivatives as electron receptors. A series of electroluminescent devices were prepared by spin-coating the target product on ITO as active luminescent layer and their luminescence properties were tested. In the molecular design, flexible chains were introduced into the donor to regulate the solubility of the target product. Secondly, by changing the donor and receptor to regulate the band gap of the target product, the absorption and emission wavelength is red shifted to the near infrared region. The structure of NIR luminescent material is analyzed by 1H-NMR-IREA and other methods. The results show that the decomposition temperature of the five target products is above 350 鈩，

本文編號：1696963