Synthesis and properties of highly efficient electroluminescent green phosphorescent iridium cored dendrimers
Synthesis and properties of highly efficient electroluminescent green phosphorescent iridium cored dendrimers
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DOI：
10.1021/ma030383w
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发表时间：
2003-12
期刊：
影响因子：
5.5
通讯作者：
S. Lo;E. Namdas;P. Burn;I. Samuel
中科院分区：
文献类型：
--
作者：
S. Lo;E. Namdas;P. Burn;I. Samuel
开发了一种简单的收敛程序，用于制备具有联苯基树枝和 fac-三（2-苯基吡啶基）铱（III）核的可溶液加工的磷光树枝状聚合物。我们发现树突的附着点和分支对于控制光发射的颜色很重要。光致发光激发测量表明能量可以有效地从树枝转移到核心。树枝状聚合物的溶液光致发光量子产率 (PLQY) 测量值为 70%，表明树枝状分子的附着不会降低核心铱配合物的发光效率。纯树枝状聚合物薄膜的 PLQY 随着世代的增加而增加，第二代树枝状聚合物的纯薄膜 PLQY 为 31%，比第一代树枝状聚合物高 11/2 倍，几乎是非树枝状铱配合物的 3 倍，这证明了树枝状聚合物结构控制分子间相互作用的能力。电化学...
A simple convergent procedure has been developed for the preparation of solution processable phosphorescent dendrimers with biphenyl-based dendrons and fac-tris(2-phenylpyridyl)iridium(III) cores. We found that the attachment point and branching of the dendrons are important for controlling the color of the light emission. Photoluminescence excitation measurements showed that energy could be transferred efficiently from the dendrons to the core. Solution photoluminescence quantum yield (PLQY) measurements of the dendrimers were of order 70%, showing that the attachment of the dendron did not decrease the luminescence efficiency of the core iridium complex. The PLQYs of the neat dendrimer films increased with generation with the second-generation dendrimer having a neat film PLQY of 31%, 11/2 times higher than the first-generation dendrimers and almost 3 times that of the nondendritic iridium complex, demonstrating the power of the dendrimer architecture to control intermolecular interactions. Electrochemi...