title: Process dependence of morphology and microstructure of cyanine dye J-aggregate film: correlation with absorption, photo- and electroluminescence properties.
abstract: Cyanine dye J-aggregate films are a class of absorbing and luminescent materials which have been extensively applied in the polariton-based research. Here we systematically study the DEDOC cyanine dyes J-aggregate films made by layer-by-layer assembly and spin-coating processes to establish a clear correlation between the film structure and the absorption and luminescence properties. From detailed analyses of morphology, optical spectra, and light-emitting diode characteristics, we demonstrate that layer-by-layer assembled film has higher degrees of homogeneity and molecular packing quality than spin-coated film, leading to a higher absorption coefficient, more uniform luminescence, and a greater electroluminescence quantum efficiency with maximized thickness.
authors.forename: Jui-Fen
authors.initials: JF
authors.lastname: Chang
authors.forename: Fan-Ching
authors.initials: FC
authors.lastname: Chien
authors.forename: Ching-Wei
authors.initials: CW
authors.lastname: Cheng
authors.forename: Chen-Chih
authors.initials: CC
authors.lastname: Lin
authors.forename: Yang-Han
authors.initials: YH
authors.lastname: Lu
authors.forename: Hung-Sen
authors.initials: HS
authors.lastname: Wei
authors.forename: Cheng-Chung
authors.initials: CC
authors.lastname: Jaing
authors.forename: Cheng-Chung
authors.initials: CC
authors.lastname: Lee
mesh_terms: D065638:Absorption, Radiation; D002232:Carbocyanines / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry*; D004560:Electricity; D004581:Electronics; D005898:Glass / Q000737:chemistry; D049449:Luminescence; D018625:Microscopy, Atomic Force; D013057:Spectrum Analysis
chemical_list: D002232:Carbocyanines; D004396:Coloring Agents