Self-Absorption Effect in Polymer Films Doped with Difluoroboron β-Diketonates

The spectral properties of difluoroboron beta-diketonates in a polystyrene matrix have been studied. A bathochromic shift of the fluorescence bands of dyes in the steady-state luminescence spectra during the transition from solutions to polymer films was revealed, which is associated with the self-absorption of dyes. It is shown that the use of a mask for excitation of a small section of the film is a simple and convenient method for preventing the effect of dye self-absorption in the film on the structure of the fluorescence spectrum.

Automated summary

The spectral properties of difluoroboron beta-diketonates in a polystyrene matrix were investigated. A bathochromic shift of the fluorescence bands was observed in the steady-state luminescence spectra during the transition from solutions to polymer films, which is attributed to dye self-absorption. It was demonstrated that using a mask to excite a small portion of the film is a simple and convenient method to prevent the effect of dye self-absorption on the fluorescence spectrum structure.