Synthesis and Optical Properties of Heteroaromatic Ring Compounds Containing EDOT

Thiophene-based conjugated polymers and oligomers have been widely used as active materials for the fabrication of optoelectronic devices such as field-effect transistors, light-emitting devices and photovoltaic cells.1 The optical and electronic properties of the active material depend on the energy levels of the HOMO and LUMO. In order to control the levels, extensive studies aiming at the modification of the oligothiophene backbone have been carried out.2 As an electronic material, 3,4-ethylenedioxythiophene (EDOT) is an important versatile building block for the molecular engineering of functional π-conjugated systems with electronic and optical properties specifically tailored for applications in light-emitting devices, chromophores for non-linear optics, low energy gap systems or more recently