648430-73-3Relevant academic research and scientific papers
Synthesis and properties of thieno[3,2-b]thiophene derivatives for application of OFET active layer
Ito, Hiroki,Yamamoto, Tatsuya,Yoshimoto, Noriyuki,Tsushima, Noboru,Muraoka, Hiroki,Ogawa, Satoshi
, p. 25 - 35 (2013/02/25)
A series of thieno[3,2-b]thiophene derivatives having styryl groups were synthesized via short steps and characterized by UV-vis absorption spectra and cyclic voltammetry. Based on these results, we found that the introduction of long chain alkyl groups to the terminal styryl groups leads to narrower HOMO-LUMO gaps and higher HOMO energy levels than the unalkylated styryl substituted molecules. Organic field-effect transistor (OFET) devices using these derivatives as the active layer were fabricated by a vacuum deposition process. It was demonstrated that these devices showed a relatively high hole mobility up to 3.5 × 10-2 cm2/Vs. These devices also showed a good stability, namely their mobilities did not decrease over 100 days in air. Therefore, these facts suggested that the introduction of long-chain alkylated styryl groups is an effective way to improve the hole mobilities in OFETs.
Effect of Ring Fusion on the Electronic Absorption and Emission Properties of Oligothiophenes
Zhang, Xinnan,Matzger, Adam J.
, p. 9813 - 9815 (2007/10/03)
A series of fused-ring oligothiophenes were synthesized by a combination of Stille and oxidative coupling reactions. Compounds with the same number of double bonds, but varying in extent of planarization, display a similar longest wavelength absorption maximum in solution. However, the introduction of sulfur linkages into these oligothiophenes leads to a blue shift of the maximum emission wavelength and a correspondingly smaller Stokes shift.
