High-performance near-infrared (NIR) polymer light-emitting diodes (PLEDs) based on bipolar Ir(<scp>iii</scp>)-complex-grafted polymers
作者:Wentao Li、Baowen Wang、Tiezheng Miao、Jiaxiang Liu、Guorui Fu、Xingqiang Lü、Weixu Feng、Wai-Yeung Wong
DOI:10.1039/d0tc04377j
日期:——
iridium(III)-complex-doped polymers, the intrinsic phase-separation issue leading to inferior device performance is difficult to address. In this study, taking the vinyl-functionalized [Ir(iqbt)2(vb-ppy)] (Hqibt = 1-(benzo[b]-thiophen-2-yl)-isoquinoline; vb-Hppy = 2-(4′-vinylbiphenyl-4-yl)pyridine) as the polymerized complex monomer, two series of Ir(III)-complex-grafted polymers Poly(NVK-co-[Ir(iqbt)2(vb-ppy)])
尽管基于掺有铱(III)的聚合物的NIR-PLED具有成本效益高且可大面积扩展的优点,但导致器件性能较差的内在相分离问题仍然难以解决。在这项研究中,以乙烯基官能化的[Ir(iqbt)2(vb-ppy)](Hqibt = 1-(苯并[ b ]-噻吩-2-基)-异喹啉;vb-Hppy = 2-(4' -乙烯基联苯-4-基)吡啶)作为聚合的络合物单体,两个系列的Ir(III)络合物接枝的聚合物Poly(NVK-co- [Ir(iqbt)2(vb-ppy)])和Poly((乙烯基-PBD)-共-NVK-共-[Ir(iqbt)2(vb-ppy)])(NVK = N-乙烯基咔唑;乙烯基-PBD = 2-(4-(叔丁基)苯基)-5-(4'-乙烯基-[1,1'-联苯] -4-基)-2,5-二氢-1,3,4 -恶二唑)。此外,通过使用进一步掺杂或接枝有电子传输单元的双极性Ir(III)-复合物接枝的聚合物作