The photophysical properties of poly 2,2' (1 dodecyl carbazole 4,7 yl) 6,6' (oxy) bis (4 phe nylquinoline) in a solution, as a film, and in a poly(methyl methacrylate) or poly N vinylcarbazole host matrix have been studied. Considerable positive solvatochromism in the photoluminescence spectra, com pared with solvatochromism in the absorption spectra, indicates that the dipole moment of the donor-accep tor complex increases in the excited state. Calculations show that the dipole moments of the complex in the ground and excited states differ by more than an order of magnitude. Upon transition to films, photolumi nescence is observed in the entire visible spectral range (white luminescence). The intensity of the white lumi nescence grows by an order of magnitude when the polymer is dispersed in a poly(methyl methacrylate) matrix. The integrated photosensitivity and parameters of the photogeneration process (quantum yield of carrier photogeneration, quantum yield of free carrier formation, and thermalization radii) have been determined.
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