The electronic and geometric structures of poly [3-(4-octylphenyl)thiophene] have been studied by X-ray and ultraviolet photoelectron spectroscopy (XPS and UPS, respectively). Thermochromic effects, and new charge induced states generated by potassium doping, have been observed by direct UPS measurements. The experimental results are in very good agreement with the results of theoretical quantum chemical calculations performed with the Austin Model 1 semi-empirical model and the valence-effective Hamiltonian pseudo-potential model.
Xing, K. Z., Fahlman, M., Berggren, M., Inganäs, O., Andersson, M. R., Boman, M., Stafström, S., Iucci, G., Bröms, P., Johansson, N., Lögdlund, M., & Salaneck, W. R. (1996). The electronic and geometric structures of neutral and potassium-doped poly [3-(4-octylphenyl)thiophene] studied by photoelectron spectroscopy. Synthetic Metals, 76(1-3), 263-267. https://doi.org/10.1016/0379-6779(95)03467-X