Effects of Substituents in Polyvinylcarbazole Structures on Their   Optical Properties
  Absorption, photoluminescence, and photoluminescence excitation spectra of solutions and thin films of N-vinylcarbazole polymers and copolymers with various substituents directly on the carbazole moiety and on the polymer chain were studied comprehensively. Polymers that were used previously to develop polymer composites with polymethine dyes having photosensitivity over a broad spectral range including the visible and near-IR regions were selected for the studies. 
Ya. Vertsimakha, P. Lutsyk, V. Syromyatnikov, I. Savchenko
cond-mat.soft physics.chem-ph