基于新型铱化合物高效有机电致发光器件的研究

发布时间：2018-05-13 03:38

本文选题：有机电致发光器件 + 铱化合物　；参考：《电子科技大学》2015年硕士论文

【摘要】：有机电致发光器件(OLED)以其优越的性能,在下一代照明及显示技术中占有重要地位。高性能磷光材料的发展是提高OLED性能的重要途径。本论文设计、合成了两种基于金属铱化合物的高效磷光发光材料,研究了其光物理、光化学性能,制备了基于真空蒸镀法和溶液旋涂法的高性能单色光、白光OLED器件。1.设计合成新型黄绿光磷光发光材料,Ir(ppy)2bop,对其光物理、电学性质进行研究,并研究了基于该材料的黄绿光OLED器件。Ir(ppy)2bop在溶液中的发光量子产率为0.3,PL光谱发光峰位于526 nm。使用真空蒸镀法制备了基于该材料的黄绿光磷光OLED器件,器件最大发光效率为43.3 cd/A(外量子效率18.1%),发光峰位于538 nm,器件性能居于目前文献报道的同类器件最佳水平。选用溶液旋涂法制备的黄绿光磷光器件的最大发光效率为17.8 cd/A(9.1%)。2.设计合成新型红光磷光发光材料,Ir(piq)2bop,对其光物理、光化学性质进行研究,并研究了基于该材料的红光OLED器件。Ir(piq)2bop在溶液中的发光峰为614 nm,半峰宽度为55 nm。基于真空蒸镀法制备的红光磷光OLED器件的发射峰为623 nm,在1000 cd/m2亮度下的CIE坐标为(0.67,0.33),器件所获得的最大效率为7.2 cd/A(8.5%)。基于溶液旋涂法制备的基于该材料的红色磷光器件也取得了较好结果。3.制备了一系列高性能的基于上述铱化合物的荧光/磷光混合白光OLED器件。选用蓝色荧光材料DPF、黄绿色磷光材料Ir(ppy)2bop和红色磷光材料Ir(piq)3构建的白光器件表现出非常优秀的性能。器件获得的最大发光效率为55.2 cd/A,(49.6 lm/W,20%),最大CRI达到了89,在1000 cd/m2亮度下的CIE坐标为(0.38,0.46)。该器件综合性能是目前文献报道的性能最好的荧光/磷光混合白光OLED器件之一。选用DPF、Ir(ppy)2bop及深红色磷光材料Ir(piq)2bop构建的白光器件也表现出较好的性能。该器件获得的最大发光效率为44.2 cd/A,39.6 lm/W和16.1%,该器件的最大CRI为81,CIE色坐标为(041,0.49)。本论文的研究成果为高性能磷光器件的研究提供了更多的材料选择,同时也促进了高性能白光电致发光器件的发展。
[Abstract]:Organic electroluminescent devices (OLED) play an important role in the next generation of lighting and display technology for their superior performance. The development of high performance phosphor is an important way to improve the performance of OLED. In this paper, two kinds of high efficiency phosphorescence materials based on metal iridium compounds are designed and synthesized. The photophysical and photochemical properties of these materials are studied. The high performance monochromatic light, white OLED device, based on vacuum evaporation and solution spin-coating method is prepared. The photophysical and electrical properties of a new yellowish-green photoluminescence material, 2bop. were designed and synthesized. The photoluminescence quantum yield of the yellowish-green OLED device. Irppyn 2bop in solution was studied. The photoluminescence peak was at 526 nm. A yellowish green phosphorescent OLED device based on this material has been fabricated by vacuum evaporation. The maximum luminescence efficiency of the device is 43.3 cdr / A (the external quantum efficiency is 18.1cm), and the luminescence peak is located at 538nm.The device performance is the best level of the same kind of devices reported in the literature at present. The maximum luminescence efficiency of the yellowish green phosphor fabricated by solution spin-coating method is 17.8 CD / A 9.1and 2.2. The photophysical and photochemical properties of a new red phosphorescence material, 2bop. have been studied. The luminescence peak of the red OLED device. Irpiqan2bop in the solution is 614 nm and the width of the half peak is 55 nm. The emission peak of red phosphorescence OLED device based on vacuum evaporation method is 623 nm, and the CIE coordinate at 1000 cd/m2 brightness is 0.67 ~ 0.33. The maximum efficiency of the device is 7.2 CD / A ~ (8.5). The red phosphorescence device based on the solution spin-coating method has also obtained good results. A series of high performance fluorescent / phosphorescent white OLED devices based on the above mentioned iridium compounds have been fabricated. The white devices made of blue fluorescent material, yellow-green phosphorescence material Ir(ppy)2bop and red phosphorescence material Ir(piq)3 have excellent performance. The maximum luminescence efficiency obtained by the device is 55.2 cdr / An 49.6 lm / W ~ (20), the maximum CRI is 89, and the CIE coordinate at 1000 cd/m2 brightness is 0.38 ~ 0.46. The integrated performance of this device is one of the best fluorescent / phosphorescent white OLED devices reported in the literature. The white light device made of DPFF / IrPY 2bop and crimson phosphorescence material Ir(piq)2bop also shows good performance. The maximum luminescence efficiency of the device is 44.2 cdr / An 39.6 lm/W and 16.1cm, and the maximum CRI of the device is 81g CIE with a color coordinate of 0.49g. The research results in this paper provide more material choices for the research of high performance phosphorescence devices and promote the development of high performance white photoluminescence devices.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN383.1

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