title: Pi-conjugated dendrimers as stable pure-blue emissive materials: photophysical, electrochemical, and electroluminescent properties.
abstract: A family of giant pi-conjugated dendrimers has been developed as pure-blue active materials for organic light-emitting diodes (OLEDs). The investigation of their photophysical properties indicates that G0 and G1 exhibit almost the same absorption and PL spectra in dilute solutions and in thin films. The steric hindrance of the bulky dendrimers effectively prevents strong intermolecular interaction in the solid state, which effectively improves the emission spectral stability. Preliminary OLEDs fabricated with the configuration of ITO/PEDOT:PSS/PVK/dendrimer/TPBI/Ba/Al achieve a pure-blue emission with stable CIE chromaticity coordinates (0.16, 0.08) for both G0 and G1. These results indicate that G0 and G1 are promising blue-light emitting materials with good stability. Such strategy provides us a platform to achieve pure-blue emitting dendrimer-like materials with high efficiency for use as OLEDs.
authors.affiliation: Beijing National Laboratory for Molecular Sciences, College of Chemistry, Peking University, Beijing 100871, China.
authors.forename: Yang
authors.initials: Y
authors.lastname: Jiang
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Zhou
authors.forename: Yu-Xin
authors.initials: YX
authors.lastname: Cui
authors.forename: Jian
authors.initials: J
authors.lastname: Wang
authors.forename: Yong
authors.initials: Y
authors.lastname: Cao
authors.forename: Jian
authors.initials: J
authors.lastname: Pei
mesh_terms: D050091:Dendrimers / Q000737:chemistry* / Q000528:radiation effects; D004563:Electrochemistry; D004583:Electrons; D049449:Luminescence; D010777:Photochemistry; D011084:Polycyclic Aromatic Hydrocarbons / Q000737:chemistry* / Q000528:radiation effects; D011789:Quantum Theory
chemical_list: D050091:Dendrimers; D011084:Polycyclic Aromatic Hydrocarbons