Tuning of photoluminescence properties of functional phthalides for OLED applications
作者:Madhesh Shanmugasundaram、Joshy Joseph、Danaboyina Ramaiah
DOI:10.1016/j.jphotochem.2016.08.008
日期:2016.11
mixture with an average size of ca. 100 nm. Supporting the observed aggregation induced enhancement in emission properties, these derivatives also exhibited significantly enhanced solid state fluorescence quantum yields of ca. 0.58–0.60. As a representative example, organic light emitting diode (OLED) fabricated using the derivative 3 as the emissive layer showed an efficient electroluminescence centered
为了开发简单的有机体系并为光电应用调整其性能,我们合成了三种官能化的苯酞衍生物,并研究了它们在不同条件下的电致发光和光物理性质。这些衍生物在普通有机溶剂中显示出良好的溶解性,并在320–400 nm范围内表现出较强的吸收性,摩尔消光系数约为ca。10 4 M -1 cm -1。这些衍生物的单体溶液表现出非常低的荧光量子产率(Φ ˚F的)约由于它们固有的结构特征(例如分子内自由旋转和衰变到深色三重态),它们的变化范围为0.003-0.04。但是,与路易斯酸(如BCl 3)络合后,这些衍生物显示出的荧光量子产率提高到约。0.21±0.01,并且在水/乙腈混合物中还表现出聚集诱导的发射(AIE),其发射率范围约为。0.11-0.16。通过SEM和TEM对聚集体进行形态分析,结果表明在90%的水/乙腈混合物中形成了棒状结构,其平均粒径约为5。100纳米 支持观察到的聚集诱导的发射性质的增强,这