Solution processed uniaxially oriented thin film of tert-butyl-substituted phthalocyanine.

Uniaxially orientated thin film of phthalocyanine with bulky tert-butyl substituents (t-BuPcH₂) was fabricated by bar-coating method. The thin film exhibited high dichroic ratio of more than 50 in the polarized absorption. Molecular packing structure of t-BuPcH₂ in the thin film was suggested by using the results of XRD measurements, in which the molecular plane of t-BuPcH₂ was determined to be perpendicular to the substrate and bar-sweep direction. In addition, the X-ray rocking curve measurements demonstrated that t-BuPcH₂ possessed highly molecular orientation in the thin film fabricated by bar-coating method. [ABSTRACT FROM AUTHOR]