To optimise the exposure time and understand the effect of functionalisation with UV-Ozone, pDPP3T thin films were exposed at increasing times of 1 -1200 s. The optical properties of the thin films were then characterised using UV-Vis-NIR absorbance spectroscopy revealing a decrease in absorbance with increasing exposure time. Contact angle measurements and X-ray photoelectron spectroscopy (XPS) confirmed the introduction of oxygen containing functional groups, whilst atomic force microscopy (AFM) provided evidence for a smoothing of the surface with increased exposure time. Using electrical measurements and cell adhesion studies, the surface treatment time was optimised. To prove the suitability of our approach for cell interfacing, Schwann cells were successfully seeded onto the UVO treated pDPP3T thin films and electrical impedance spectroscopy (EIS) was used to measure cell count over time. We believe that the simple technique of UVO treatment, using readily available CP materials, will allow material scientists to electrically characterise cell culture without the need for intricate chemical modification or specialised processing techniques.