Synthesis and characterization of yellow-emitting electrophosphorescent polymers based on a fluorinated poly(arylene ether phosphine oxide) scaffold
Synthesis and characterization of yellow-emitting electrophosphorescent polymers based on a fluorinated poly(arylene ether phosphine oxide) scaffold
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基于氟化聚（亚芳基醚氧化膦）支架的黄光电致磷光聚合物的合成和表征
DOI：
10.1039/c2jm34421a
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发表时间：
2012-11
期刊：
影响因子：
--
通讯作者：
王利祥
中科院分区：
文献类型：
--
作者：
王利祥
A series of novel yellow-emitting electrophosphorescent polymers (PhPs) have been designed and synthesized by grafting a 2-(fluoren-2-yl)-1H-benzoimidazole ligand based iridium complex, (fbi)2Ir(acac), with a fluorinated poly(arylene ether phosphine oxide) backbone (FPCzPO). Due to the efficient intermolecular Forster energy transfer from FPCzPO to (fbi)2Ir(acac) and charge trapping on (fbi)2Ir(acac), the electroluminescence from FPCzPO is almost completely quenched, even if the Ir complex content incorporated into the polymer is as low as 2 mol%. It is found that the polymer exhibits the best device performance when the Ir loading is optimized to 3 mol%. A peak luminous efficiency of 10.4 cd A−1 with Commission Internationale de L'Eclairage coordinates of (0.53, 0.46) is achieved, which is superior to that of the previously reported yellow PhPs with polyfluorene as the main chain. The result indicates that the fluorinated poly(arylene ether phosphine oxide) is a promising scaffold for the construction of efficient yellow PhPs.
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