[18p-G205-1~18] 12.1 Fabrications and Structure Controls

△ [18p-G205-7] Crack Suppression Effect on Uniaxially Oriented Thin Films of Polymer-Doped Mesogenic Phthalocyanine Fabricated by Contact Freezing Method

〇Takahiro Kitagawa¹, Mihary Fiderana Ramananarivo¹, Akihiko Fujii¹, Masanori Ozaki¹ (1.Osaka Univ.)

Keywords:Orientation control, Phthalocyanine, Contact freezing

Uniaxially oriented thin film of mesogenic phthalocyanine, 1,4,8,11,15,18,22,25-octahexylphthalocyanine (C6PcH₂) which exhibits high carrier mobility, has been fabricated by “contact freezing method”. Cracks appeared in the cooling process to room temperature after contact freezing were one of the problems for the carrier transport, however, we have succeeded in suppressing the cracks by blending a polymer, poly(3-hexylthiophene) (P3HT), at an appropriate blend ratio. The molecular orientation, crystalline structure and electrical properties of the films have been investigated by polarizing microscope observation and measurements of polarized absorption spectrum, X-ray diffraction and the field effect mobility, and P3HT blend effects have been discussed.