Asymmetric Thin Film of Poly(p-phenylene) Prepared by Vacuum Deposition

概要

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The thin film, prepared by a vacuum deposition method from poly(p-phenylene) synthesized from benzene by a CuCl-AlCl_3-O_2 catalytic system, had an asymmetric property in its photo-luminescence spectra. Namely, the spectrum observed from the region near the surface had maximum emission peaks at 400-500 nm, while the spectrum observed from the region near the substrate had a maximum emission peak at wavelength above 600 nm. This asymmetric property was observed in the case of the film prepared with a low-temperature substrate. To the contrary, the thin film, prepared at high substrate temperature (150℃), or heat-treated (200℃, in N_2, 1 h) after preparation, had no such asymmetric property. The asymmetric property was related to the surface crystallinity and probably the morphology of the film. The surface of the asymmetric film was almost structure less except for some structures resembling whiskers. The surface of the film without the asymmetric property, however, consisted of meshlike structure constructed by small round particles or a complicated meshlike structure.
社団法人応用物理学会の論文
1994-06-15