[15a-P03-1~9] 12.4 Organic light-emitting devices and organic transistors

[15a-P03-6] Crystal structures and single crystal transistors of unsymmetric tetrabenzoporphyrin

〇Kazuya Miyazaki¹, Keitaro Yamamoto¹, Mitsuaki Yamauchi¹, Yoshiyuki Mizuhata¹, Naoki Aratani², Hiroko Yamada¹ (1.ICR, Kyoto Univ., 2.Grad. Sch. Sci. Tech. NAIST)

Keywords:

Organic field-effect transistors,Crystal structure analysis,Tetrabenzoporphyrin

Tetrabenzoporphyrins (TBPs) are promising organic semiconductors due to the rigid structure and two-dimensionally extended pi-conjugation. However, the tendency of 5,15-substituted TBPs to form one-dimensional crossed pi-stacking structure is disadvantageous for organic field-effect transistor (OFET) applications compared to 2-D packing strucure. We have found that two molecules of an unsymmetric TBP derivative with different substituents at positions 5 and 15 preferentially form a herringbone structure, a useful 2-D packing for organic semiconductor materials, by offsetting dipole moments when facing each other. Their synthesis, crystal structures, and single-crystal OFET characteristics will be presented.