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有机电致磷光材料,由于具有100%的内量子效率,在OLED领域中被广泛应用。为了避免磷光材料本身存在的三线态-三线态激子猝灭导致磷光效率的降低,磷光材料应用于有机电致发光器件时,需要用主体材料将其均匀分散以减少发光中心间的相互作用,因此主体材料的选择对磷光器件是十分重要的。而聚合物主体材料由于具有易加工,成本低等优点,且对于实现高性能的蓝光和白色旋涂器件有重要意义,而备受关注。本文设计合成了一种聚芴类主体材料PSiF,聚合物表现出良好的热稳定性(热分解温度Td≥400℃),将其与绿色磷光染料Ir(ppy)3以16 wt%的浓度掺杂,器件的最大的发光效率为0.25cd/A;最大的功率效率为0.14l m/w。
Organic phosphorescent materials, due to their 100% internal quantum efficiency, are widely used in the field of OLEDs. In order to avoid phosphorescent quenching of the triplet-triplet exciton, the phosphorescent material needs to be dispersed uniformly by the host material to reduce the interaction between the light-emitting centers when the phosphorescent material is applied to the organic electroluminescent device, Therefore, the choice of host material for the phosphorescent device is very important. The polymer host material due to its ease of processing, low cost, and for the realization of high-performance blue and white spin-on device is of great significance, and much attention. In this paper, a polyfluorene-based host material PSiF was synthesized and synthesized. The polymer showed good thermal stability (thermal decomposition temperature Td≥400 ℃), mixed with green phosphorescent dye Ir (ppy) 3 at a concentration of 16 wt% Miscellaneous, the device’s maximum luminous efficiency of 0.25cd / A; maximum power efficiency of 0.14lm / w.