| 초록 |
A series of α,ω-alkyl-diphenylacetylene-oligothiophenes (nT-R, n = 2, 3,4, R = butyl or hexyl) have been well synthesized and characterized. Their properties as physical, optical and electrochemical properties were investigated. As observed, thiophenes rings largely affected the properties of the oligomers than that of alkyl groups. The solubility of the oligomers decreased with increasing the units of thiophene rings. UV-vis absorption and photoluminescence spectroscopies red shifted from 2T-R, 3T-R to 4T-R, which can be attributed to extension of the conjugation length in the molecular chains. The electrochemical results showed the oxidation potentials of oligomers decreased with increasing the thiophene rings. Top-contact field-effect transistors were demonstrated by spin-coating the solution of the oligomers (nT-R, n = 2, 3, R = butyl or hexyl). Largely p-type mobility of 3T-R (R = butyl or hexyl) can be achieved as 10-3 ~ 10-2 cm2/Vs. |
