Luminescence-tuning and energy transfer mechanism of blends based on silicon-containing compounds

A series of tunable luminescence was obtained by controlling the donor/acceptor ratios. A silicon-cored fluoranthene derivative named his (7,10-diphenyl-fluoranthene) methylphenylsilane (BFMPS) was used as the donor and a perylene end-capped polydimethylsiloxane (PECP) was used as the acceptor for preparing the blending systems. Efficient energy transfer was detected in these unique systems, which were composed of micromolecules and fluorescence macromolecules. In particular, pure white emission was obtained when the adequate blending ratio was adopted. Further characterizations and investigations were carried out to examine the energy transfer from donor to acceptor both in solution and in solid thin films. Two different energy transfer mechanisms were deduced from the investigation of the ultraviolet absorption and luminescence spectra. Radiative energy transfer was dominant in solution while Foster resonant energy transfer was dominant in thin films. (C) 2013 Elsevier Ltd. All rights reserved.