A. Krol, C.J. Sher, et al.
Surface Science
The third-order nonlinear susceptibility X(3) normalized to the absorption coefficient a displays a dramatic drop at 0.4 eV above the S0-S1 transition in polythiophene derivatives. Steady-state photoconductivity data show the intrinsic photocrent starting exactly where the decrease in X(3)/α is seen. These results point to a change from bound excitons to free-electron hole pairs at 0.4 eV above the S0-S1 transition, and support the description of such disordered conjugated polymers using a molecular approach rather than as infinite one-dimensional semiconductors.
A. Krol, C.J. Sher, et al.
Surface Science
A. Gangulee, F.M. D'Heurle
Thin Solid Films
Thomas H. Baum, Carl E. Larson, et al.
Journal of Organometallic Chemistry
Frank R. Libsch, Takatoshi Tsujimura
Active Matrix Liquid Crystal Displays Technology and Applications 1997