Thermally stable chromophores and polymers for χ(2) applications
R.D. Miller, K. Betterton, et al.
SPIE Optics Quebec 1993
The initial steps involved in the charge separation process in thin films of the organic charge-transfer complex formed from poly-N-vinylcarbazole (PVK) and 2,4,7-trinitro-9-fluorenone (TNF) are observed directly using polarization selective pico-second transient grating techniques. When forming a grating with parallel polarized writing beams, a nonexponential decay of the transient grating signal is observed. When forming a grating with perpendicularly polarized writing beams, the decay of the transient grating signal is observed to increase and to be described adequately as a single exponential. These transient grating signals have been investigated as a function both of an applied electric field and as a function of the TNF ratio. All of these results are consistent with a four-level kinetic model that includes charge hopping, geminate recombination, and field-assisted charge separation. © 1992.
R.D. Miller, K. Betterton, et al.
SPIE Optics Quebec 1993
D.M. Burland, J.M. Thomas
Chemical Physics Letters
U. Schmitt, D.M. Burland
Journal of Physical Chemistry
D.M. Burland, G.C. Bjorklund, et al.
JACS