有機(jī)藍(lán)色熒光和磷光主體材料的制備及電致發(fā)光性能研究
發(fā)布時間：2018-11-05 15:00
【摘要】：有機(jī)光電材料是有機(jī)電致發(fā)光二極管（OLED）的關(guān)鍵，其自身結(jié)構(gòu)在很大程度上決定了器件的發(fā)光性能和操作穩(wěn)定性。因此，如何設(shè)計、開發(fā)與制備性能優(yōu)異的發(fā)光材料是實現(xiàn)高性能OLED器件的關(guān)鍵科學(xué)問題。在此背景下，本文設(shè)計、制備了扭轉(zhuǎn)型蒽類衍生物、新型D-A-D-A-D型化合物兩組有機(jī)藍(lán)色熒光材料以及硅烷衍生物磷光主體材料，并對其電致發(fā)光性能進(jìn)行了研究，具體工作如下： （1）以蒽為中心，，菲并咪唑、菲為功能活性單元，制備扭轉(zhuǎn)型藍(lán)光材料：p-PABPI和m-PABPI，對其光物理、光化學(xué)性能及電致發(fā)光性能進(jìn)行了研究。p-PABPI基非摻雜器件展示了強(qiáng)的藍(lán)光，最大的亮度為18980cd/m2，最大電流效率為3.98cd/A，最大功率效率為2.80lm/W，色坐標(biāo)為（0.15,0.13），該效率為m-PABPI基非摻雜器件的3倍，這為我們提供了一種新的高性能藍(lán)光分子的設(shè)計方法。p-PABPI基摻雜電致發(fā)光器件p1和p2展示了色坐標(biāo)CIE（x, y）分別為（0.15,0.08）和（0.15,0.09），非常接近標(biāo)準(zhǔn)藍(lán)光色坐標(biāo)（0.14,0.08），而m-PABPI基摻雜OLED展示了一種罕見的色坐標(biāo)為（0.15,0.04）的藍(lán)紫光，且不隨摻雜濃度的變化而變化。 （2）基于菲并咪唑缺電子基團(tuán)和三苯胺、咔唑富電子基團(tuán)合成D-A-D-A-D型藍(lán)色熒光材料：“N”型和“H”型分子，對其光物理、光化學(xué)和電致發(fā)光性能（旋涂法）進(jìn)行了研究�！癗”型分子基器件和“H”型分子基器件的最大發(fā)光效率（CEmax）分別為1.51cd/A和1.14cd/A，最大功率效率（PEmax）分別為0.56lm/W和0.38lm/W，最大外量子效率（EQEmax）分別為1.04%和0.80%，為適合濕法加工小分子的結(jié)構(gòu)設(shè)計提供了新的思路。 （3）設(shè)計并合成了以四苯基硅為中心，咔唑、苯并咪唑為取代基的化合物TCzPSi和DCzIPSi，對其光物理、光化學(xué)性能進(jìn)行了研究。它們的三線態(tài)能級高于FIrpic的三線態(tài)能級，且相應(yīng)的單/三線態(tài)交換能ΔEST小，為理想的藍(lán)色磷光主體材料。
[Abstract]:Organic optoelectronic material is the key of electromechanical light-emitting diode (OLED). Its structure determines the luminescence performance and operation stability of the device to a great extent. Therefore, how to design, develop and fabricate luminescent materials with excellent performance is a key scientific problem in the realization of high performance OLED devices. In this context, torsional anthracene derivatives, two groups of organic blue fluorescent materials of novel D-A-D compounds and phosphorescent host materials of silane derivatives were designed and prepared, and their electroluminescent properties were studied. The main works are as follows: (1) taking anthracene as the center, phenanthrene imidazole and phenanthrene as functional active units, the torsional blue light materials, p-PABPI and m-PABPI, were prepared, and their photophysical properties were analyzed. The photochemical and electroluminescent properties of p-PABPI based non-doped devices are studied. The maximum luminance is 18980cd / m ~ 2, the maximum current efficiency is 3.98cdr / A, the maximum power efficiency is 2.80lm / r / W, the maximum luminance is 18980cd / m ~ 2, the maximum current efficiency is 3.98cdr / A, the maximum power efficiency is 2.80lmW, The color coordinate is (0.15 ~ 0.13), and the efficiency is three times that of the m-PABPI based undoped device. This provides us with a new design method for blue light molecules with high performance. P-PABPI doped electroluminescent devices p1 and p2 show that the color coordinate CIE (x, y) is (0.15 ~ 0.08) and (0.15 ~ 0.09), respectively. It is very close to the standard blue color coordinate (0. 14 ~ 0. 08), while m-PABPI based doped OLED shows a rare blue violet light with a color coordinate of (0. 15 ~ 0. 04) and does not vary with the concentration of doping. (2) based on the electron-deficient group and trianiline, carbazole-rich groups were used to synthesize D-A-D type blue fluorescent materials: "N" and "H" molecules. The photochemical and electroluminescent properties (spin-coating method) were studied. The maximum luminescence efficiency (CEmax) of "N" type molecular based devices and "H" type molecular based devices were 1.51cd/A and 1.14 CD / A, respectively. The maximum power efficiency (PEmax) is 0.56lm/W and 0.38lm / W, and the maximum external quantum efficiency (EQEmax) is 1.04% and 0.80, respectively, which provides a new idea for the structural design of small molecules in wet processing. (3) the photophysical and photochemical properties of TCzPSi and DCzIPSi, compounds with tetraphenylsilicon as the center and carbazole and benzimidazole as substituents were studied. Their three-wire energy levels are higher than those of FIrpic's, and the exchange energy 螖 EST of the corresponding single / three-wire states is small, which is an ideal blue phosphorescence host material.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN383.1
本文編號：2312433
[Abstract]:Organic optoelectronic material is the key of electromechanical light-emitting diode (OLED). Its structure determines the luminescence performance and operation stability of the device to a great extent. Therefore, how to design, develop and fabricate luminescent materials with excellent performance is a key scientific problem in the realization of high performance OLED devices. In this context, torsional anthracene derivatives, two groups of organic blue fluorescent materials of novel D-A-D compounds and phosphorescent host materials of silane derivatives were designed and prepared, and their electroluminescent properties were studied. The main works are as follows: (1) taking anthracene as the center, phenanthrene imidazole and phenanthrene as functional active units, the torsional blue light materials, p-PABPI and m-PABPI, were prepared, and their photophysical properties were analyzed. The photochemical and electroluminescent properties of p-PABPI based non-doped devices are studied. The maximum luminance is 18980cd / m ~ 2, the maximum current efficiency is 3.98cdr / A, the maximum power efficiency is 2.80lm / r / W, the maximum luminance is 18980cd / m ~ 2, the maximum current efficiency is 3.98cdr / A, the maximum power efficiency is 2.80lmW, The color coordinate is (0.15 ~ 0.13), and the efficiency is three times that of the m-PABPI based undoped device. This provides us with a new design method for blue light molecules with high performance. P-PABPI doped electroluminescent devices p1 and p2 show that the color coordinate CIE (x, y) is (0.15 ~ 0.08) and (0.15 ~ 0.09), respectively. It is very close to the standard blue color coordinate (0. 14 ~ 0. 08), while m-PABPI based doped OLED shows a rare blue violet light with a color coordinate of (0. 15 ~ 0. 04) and does not vary with the concentration of doping. (2) based on the electron-deficient group and trianiline, carbazole-rich groups were used to synthesize D-A-D type blue fluorescent materials: "N" and "H" molecules. The photochemical and electroluminescent properties (spin-coating method) were studied. The maximum luminescence efficiency (CEmax) of "N" type molecular based devices and "H" type molecular based devices were 1.51cd/A and 1.14 CD / A, respectively. The maximum power efficiency (PEmax) is 0.56lm/W and 0.38lm / W, and the maximum external quantum efficiency (EQEmax) is 1.04% and 0.80, respectively, which provides a new idea for the structural design of small molecules in wet processing. (3) the photophysical and photochemical properties of TCzPSi and DCzIPSi, compounds with tetraphenylsilicon as the center and carbazole and benzimidazole as substituents were studied. Their three-wire energy levels are higher than those of FIrpic's, and the exchange energy 螖 EST of the corresponding single / three-wire states is small, which is an ideal blue phosphorescence host material.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TN383.1
【參考文獻(xiàn)】
相關(guān)博士學(xué)位論文 前1條
1 胡德華;含硅類寬禁帶母體材料的設(shè)計合成與光電性質(zhì)研究[D];吉林大學(xué);2011年
本文編號：2312433
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