| 초록 |
We synthesized two new anthradithiophene derivatives : 9,10-di(4’-pentylphenylethynyl)-anthra[2,3-b:6,7-b’]dithiophene (DPPEADT) and 9,10-bi([9’,9’-dimethyl-fluoren-2-ylethynyl])-anthra[2,3-b:6,7-b’]dithiophene (DFEADT). We investigated the effects of the solvent boiling point on organic field-effect transistor (OFET) device performances in devices prepared using two newly synthesized materials: DPPEADT and DFEADT. We characterized the relationship between the molecular structures, film morphologies, and OFET device performances in devices prepared using solvents having one of three different boiling points (chlorobenzene, 1,2-dichlorobenzene, and 1,2,4-trichlorobenzene) 1,2,4-Trichlorobenzene, which provided the highest boiling point among the solvents tested and acted as a good solvent for DPPEADT, significantly improved the field-effect mobilities of DPPEADT devices up to 0.16 cm2/V by enhancing the crystallinity of the film. OFETs based on amorphous DFEADT films prepared using the three solvents did not provide enhanced electrical performances. |
