Properties of novel perylene-3,4:9,10-tetracarboxidiimide-centred dendrimers and their application as emitters in organic electroluminescence devices

The UV–vis absorption and fluorescence spectra, solubility, and application as emitters in single-layer EL devices of novel perylene-3,4:9,10-tetracarboxidiimide-centred dendrimers (Gn-Perys) were examined. Gn-Perys showed absorption maxima (λmax) at 459, 491, and 529 nm in chloroform. The emission maxima (λem) were observed at 537, 576, and 621 nm. The fluorescence intensities of G1-, G2-, and G3-Perys were ca. one-twentieth compared with that of G0-Pery. However, the concentration-quenching of Gn-Perys (n = 1, 2, 3) was improved. The solubility of Gn-Perys increased at higher generation. The electroluminescence (EL) maxima of Gn-Perys in single-layer EL devices containing PVK and PBD as host materials were observed at around 430 and 600 nm, there being white emission. No remarkable difference in the EL characteristics was observed among Gn-Perys.