Plasma deposition of thiophene derivatives under atmospheric pressure

Abstract

Plasma deposition of conjugated polymer films under atmospheric pressure is described. Three thiophene derivatives (thiophene, 3-methylthiophene, and 3,4-ethylenedioxythiophene) are used as monomers. The plasma depositions with the various precursors are compared using analytical techniques such as X-ray photoelectron spectroscopy (XPS), Fourier transform infrared (FTIR) spectroscopy, UV-vis spectroscopy, and resistance measurements. Good results are obtained with pulsed plasma depositions of poly(3,4-ethylenedioxythiophene). Conductivities of up to 1 x 10(-2) S cm(-1) are measured.