Molecular modification of 2,6-diphenylbenzo[1,2-b : 4,5-b']dichalcogenophenes by introduction of strong electron-withdrawing groups: Conversion from p- to n-channel OFET materials

Takimiya K; Kunugi Y; Ebata H; Otsubo T

Chemistry Letters, Vol.35, No.10, 1200-1201, 2006

DOI10.1246/cl.2006.1200 Export Citation

Molecular modification of 2,6-diphenylbenzo[1,2-b : 4,5-b']dichalcogenophenes by introduction of strong electron-withdrawing groups: Conversion from p- to n-channel OFET materials

Takimiya K, Kunugi Y, Ebata H, Otsubo T

2,6-Diphenylbenzof 1,2-b:4,5-b']dithiophene (DPh-BDT) and -diselenophene (DPh-BDS) as p-channel semiconducting materials were modified by introducing fluoro, cyano, or trifluoromethyl groups into the attached phenyl moieties. On examination of organic field-effect transistors fabricated using these modified compounds, the trifluoromethyl-substituted DPh-BDT and BDS derivatives were found to act as n-channel semiconductors with high electron mobilities of 0.044 and 0.10 cm(2) V-1 s(-1), respectively.