A series of phosphine oxide-functionalized polyfluorene derivatives, PFH-PO-40-1 (P1), PFH-PO-20-1 (P2), PFH-PO-10-1 (P3), and PFH-PO-1-1 (P4), were prepared via a palladium-mediated Suzuki cross-coupling reaction. The structures and purities of all polymers were fully characterized by 1H and 13C NMR, UV-vis and photoluminescent spectroscopy, gel permeation chromatography, and TGA/DSC. Their emission features showed single broad peaks at about 445 nm in film, compared with those in dilute solutions, which might be caused by some degree of aggregation in the excited states of the backbones. The best electroluminescence (EL) performance of these polymers with configuration of ITO/PEDOT:PSS/Polymer/Alq3/LiF/Al was obtained from P1 (current efficiency was 4.2 Cd/A at 6V).
一系列
磷烷氧化物功能化的聚
氟烯衍
生物,PFH-PO-40-1 (P1)、PFH-PO-20-1 (P2)、PFH-PO-10-1 (P3)和PFH-PO-1-1 (P4),通过
钯介导的铃木交叉偶联反应制备。所有聚合物的结构和纯度均通过核磁共振(1H和13C NMR)、紫外-可见光谱和光致发光光谱、凝胶渗透色谱和热重分析/差示扫描量热法(TGA/
DSC)进行了全面表征。它们的发射特征在薄膜中显示出约445 nm的单一宽峰,而在稀溶液中则有所不同,这可能是由于主链在激发态下发生了一定程度的聚集。这些聚合物在ITO/PEDOT:PSS/聚合物/Alq3/
LiF/Al构型下获得的最佳电致发光(EL)性能是来自P1(在6V时电流效率为4.2 Cd/A)。