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首页> 外文期刊>Molecular Crystals and Liquid Crystals >Properties of Blue Polymer Light Emitting Diodes According to the Doping Concentrations of FIrpic Phosphorescence
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Properties of Blue Polymer Light Emitting Diodes According to the Doping Concentrations of FIrpic Phosphorescence

机译：荧光磷光掺杂浓度对蓝色聚合物发光二极管性能的影响

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摘要

PFO [poly(9,9-dioctylfluorene-2-7-diyl) end capped with N,N-Bis(4-methylphenyl)-4-aniline] based blue polymer light emitting diodes (PLEDs) that use a FIrpic [iridium(III) bis[4,6-(difluorophenyl) pyridinato-N,C20 picolinate] phosphorescent dopant as an emission layer were fabricated using a host-dopant system in order to achieve high luminance and efficiency properties. To find the optimum doping concentration, the FIrpic was doped at various concentrations, ranging from 1 to 4 wt%, into the PFO host. Blue phosphorescence PLEDs with the structure of ITO/PEDOT:PSS/PFO:FIrpic/TPBI/LiF/Al were prepared. The electrical and optical properties were investigated and compared in the prepared PLED devices with and without the FIrpic dopant. The luminance and the current efficiency were improved by introducing the FIrpic dopant. For the PLED device with a 2 wt% FIrpic concentration, the maximum luminance and current efficiency was found to be 4128 cd/m2 and 0.92 cd/A, respectively. The CIE color coordinates was (x, y = 0.19, 0.28), exhibiting a sky-blue color.
机译：基于FFO [聚（9,9-二辛基芴-2-7-二基）端基的N，N-双（4-甲基苯基）-4-苯胺]的蓝色聚合物发光二极管（PLED） III）使用主体-掺杂剂系统制备双[4,6-（二氟苯基）吡啶基-N，C20吡啶甲酸N]磷光掺杂剂作为发光层，以实现高亮度和效率特性。为了找到最佳掺杂浓度，将FIrpic以1-4 wt％的各种浓度掺杂到PFO主体中。制备了具有ITO / PEDOT：PSS / PFO：FIrpic / TPBI / LiF / Al结构的蓝色磷光PLED。在制备的有和没有FIrpic掺杂剂的PLED器件中，对电学和光学性能进行了研究和比较。通过引入FIrpic掺杂剂可以提高亮度和电流效率。对于具有2 wt％FIrpic浓度的PLED器件，发现最大亮度和电流效率分别为4128 cd / m 2 和0.92 cd / A。 CIE颜色坐标为（x，y = 0.19，0.28），呈现出天蓝色。

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