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Characteristics of blue organic electroluminescent devices with distyryl arylene derivatives

机译：二苯乙烯基亚芳基衍生物的蓝色有机电致发光器件的特性

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Abstract: We have studied organic electroluminescence (EL) characteristics for a multilayer thin film cell with distyryl arylene derivatives (DSA) as emitting materials. We found that it is very important for an emitting layer not to form exciplex or charge transfer complex (ECT) with the hole transporting layer (diamine derivatives) in addition to an ability to form a good thin film. In this paper, we report a new series of DSA not to form the ECT with the hole transporting layer owing to the molecular conformation. We substituted two hydrogen atoms for two phenyl rings and designed some new DSA which are not planar. These DSA are intense blue fluorescent materials and have good film-forming ability. A cell with ITO/hole transporting layer/emitting layer/Mg:Ag was fabricated by vacuum evaporation technique. We obtained bright emission more than 1000 cd/m$+2$/ with dc voltage of less than 12 V and high luminous efficiency about 0.6 lm/W at 1000 cd/m$+2$/ for several kinds of DSA as emitting materials. In these cells we successfully avoid ECT formation at the interface between the hole transporting layer and the emitting layer.!12
机译：摘要：我们研究了以二苯乙烯基亚芳基衍生物（DSA）为发光材料的多层薄膜电池的有机电致发光（EL）特性。我们发现对于发光层来说，除了具有形成良好薄膜的能力之外，不与空穴传输层（二胺衍生物）形成激基复合物或电荷转移复合物（ECT）非常重要。在本文中，我们报告了一系列新的DSA，由于分子构象而没有与空穴传输层一起形成ECT。我们用两个氢原子取代了两个苯环，并设计了一些新的非平面DSA。这些DSA是强蓝色荧光材料，并具有良好的成膜能力。通过真空蒸发技术制备了具有ITO /空穴传输层/发射层/ Mg：Ag的电池。对于几种DSA发光材料，我们获得了超过1000 cd / m $ + 2 $ /的明亮发射光，直流电压小于12 V，在1000 cd / m $ + 2 $ /的高发光效率约为0.6 lm / W 。在这些单元中，我们成功地避免了在空穴传输层和发射层之间的界面上形成ECT。12

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