【摘要】 以2-(菲-9)-吡啶、1-(菲-9)异喹啉和喹喔啉并[2,3-l]菲为配体,合成了3个新颖的红色到近红外磷光配合物(pypt)2Ir(acac)、(sqpt)2Ir(acac)和(qupt)2Ir(acac).对这些配合物的吸收、发射光谱和电化学性质进行了研究,结果发现,菲取代基的性质主要影响配合物的LUMO能级,随着菲取代基共轭程度的增加,吸收光谱和发射光谱红移,光致发光(PL)光谱从619 nm红移到704 nm.将4%的(sqpt)2Ir(acac)掺杂在PVK+PBD主体材料中制备了掺杂磷光发光器件,器件电致发光(EL)光谱的λmax为704 nm,器件的EL光谱从红色一直延伸到近红外区域.更多还原

【Abstract】 A new series of red to near-infrared phosphorescent complexes,(pypt)2Ir(acac),(sqpt)2Ir(acac) and(qupt)2Ir(acac), based on 2-(phenanthren-9-yl)pyridine(pyptH), 1-(phenanthren-9-yl) isoquinoline(sqptH) and quinoxalino[2,3-l]phenanthrene(quptH) as ligands were synthesized. The absorption, luminescence and electrochemical properties of these complexes showed that LUMO energy level significantly decreased with π-conjugate extension of the substitutes on phenanthrene ring, but neglectable affection for HOMO energy level. The π-conjugate extension of the ligand in complexes results in red-shift in absorption and emission of complexes. The complexes exhibited intense phosphorescence in room temperature, with λmax = 619 nm for(pypt)2Ir(acac), 690 nm for(sqpt)2Ir(acac) and 704 nm for(qupt)2Ir(acac). Red to near infrared phosphorescent organic light-emitting diodes were fabricated by doping 4%(sqpt)2Ir(acac) into host of PVK and PBD. EL spectra had λmax at 704 nm, and extend into near infrared region.更多还原