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首页> 外文会议>Symposium on Organic and Polymeric Materials and Devices―Optical, Electrical and Optoelectronic Properties Apr 1-5, 2002 San Francisco, California, U.S.A. >Efficient blue-green molecular organic light emitting diodes based on novel silole derivatives
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Efficient blue-green molecular organic light emitting diodes based on novel silole derivatives

机译：基于新型硅溶胶衍生物的高效蓝绿色分子有机发光二极管

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摘要

We report on highly efficient molecular organic light-emitting diodes (MOLEDs) using two novel silole derivatives as emissive and electron transport materials. A silole derivative, namely 2,5-di-(3-biphenyl)-l,l-dimethyl-3,4-diphenylsilacyclopentadiene (PPSPP), which shows blue fluorescence with a high photoluminescence quantum yield of 85% in the solid state, was used as the emissive material. Another silole derivative, namely 2,5-bis-(2',2"-bipyridin-6-yl)-l,l-dimethyl-3,4-diphenylsilacyclopentadiene (PyPySPyPy), that exhibits a non-dispersive high electron mobility of 2x10~(-4)cm~2/Vsec was used as the electron transport material. MOLEDs using these two siloles and a common hole transport material show blue-green emission centered at 495 nm. This red-shifted electroluminescence (EL) band relative to the blue fluorescence of PPSPP is assigned to a PPSPP:NPB exciplex. A low operating voltage of 4.5 V was measured at a luminance of 100 cd/m~2 and an EL quantum efficiency of 3.4% was achieved at 100 A/m~2. To our knowledge, this is the highest EL quantum efficiency ever reported based on exciplex emission.
机译：我们报告了高效的分子有机发光二极管（MOLED），它使用两种新型的Silole衍生物作为发光和电子传输材料。一种硅酮衍生物，即2,5-二-（3-联苯基）-1,1-二甲基-3,4-二苯基硅杂环戊二烯（PPSPP），在固态下显示蓝色荧光，光致发光的量子产率高达85％，用作发射材料。另一种甲硅烷基衍生物，即2,5-双-（2'，2“-联吡啶-6-基）-1,1-二甲基-3,4-二苯基硅环戊二烯（PyPySPyPy），表现出不分散的高电子迁移率使用2x10〜（-4）cm〜2 / Vsec作为电子传输材料，使用这两个小柱和常见的空穴传输材料的MOLED显示出以495 nm为中心的蓝绿色发射，该红移的电致发光（EL）谱带相对在PPSPP：NPB激基复合物上分配了蓝色荧光，在100 cd / m〜2的亮度下测得的低工作电压为4.5 V，在100 A / m〜的条件下获得了3.4％的EL量子效率。 2.据我们所知，这是有史以来基于激基复合物发射所报道的最高EL量子效率。

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