有机蓝色荧光和磷光主体材料的制备及电致发光性能研究
发布时间：2018-11-05 15:00
【摘要】：有机光电材料是有机电致发光二极管（OLED）的关键，其自身结构在很大程度上决定了器件的发光性能和操作稳定性。因此，如何设计、开发与制备性能优异的发光材料是实现高性能OLED器件的关键科学问题。在此背景下，本文设计、制备了扭转型蒽类衍生物、新型D-A-D-A-D型化合物两组有机蓝色荧光材料以及硅烷衍生物磷光主体材料，并对其电致发光性能进行了研究，具体工作如下： （1）以蒽为中心，，菲并咪唑、菲为功能活性单元，制备扭转型蓝光材料：p-PABPI和m-PABPI，对其光物理、光化学性能及电致发光性能进行了研究。p-PABPI基非掺杂器件展示了强的蓝光，最大的亮度为18980cd/m2，最大电流效率为3.98cd/A，最大功率效率为2.80lm/W，色坐标为（0.15,0.13），该效率为m-PABPI基非掺杂器件的3倍，这为我们提供了一种新的高性能蓝光分子的设计方法。p-PABPI基掺杂电致发光器件p1和p2展示了色坐标CIE（x, y）分别为（0.15,0.08）和（0.15,0.09），非常接近标准蓝光色坐标（0.14,0.08），而m-PABPI基掺杂OLED展示了一种罕见的色坐标为（0.15,0.04）的蓝紫光，且不随掺杂浓度的变化而变化。 （2）基于菲并咪唑缺电子基团和三苯胺、咔唑富电子基团合成D-A-D-A-D型蓝色荧光材料：“N”型和“H”型分子，对其光物理、光化学和电致发光性能（旋涂法）进行了研究。“N”型分子基器件和“H”型分子基器件的最大发光效率（CEmax）分别为1.51cd/A和1.14cd/A，最大功率效率（PEmax）分别为0.56lm/W和0.38lm/W，最大外量子效率（EQEmax）分别为1.04%和0.80%，为适合湿法加工小分子的结构设计提供了新的思路。 （3）设计并合成了以四苯基硅为中心，咔唑、苯并咪唑为取代基的化合物TCzPSi和DCzIPSi，对其光物理、光化学性能进行了研究。它们的三线态能级高于FIrpic的三线态能级，且相应的单/三线态交换能ΔEST小，为理想的蓝色磷光主体材料。
[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.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN383.1
本文编号：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.
【学位授予单位】：中北大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN383.1
【参考文献】
相关博士学位论文 前1条
1 胡德华;含硅类宽禁带母体材料的设计合成与光电性质研究[D];吉林大学;2011年
本文编号：2312433
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