Franck-Condon analysis of fluorescence quenching in hybrid P3HT: wt TBPO-capped CdSe quantum dot matrix

摘要

Fluorescence and optical absorption spectra of hybrid material's structure Poly (3-hexylthiophene-2, 5-diyl) - wt TBPO-capped CdSe are measured and analyzed by the Franck-Condon theory. Fluorescence spectra both in solution and in thin films show a monotonic decrease with the increase in the TBPO-capped CdSe quantum dots concentration. We have used the Franck-Condon analysis method to estimate the vibrational modes energy, the Huang-Rhys factor and the relaxation energy as a function of TBPO-capped CdSe quantum dots concentrations. We notice that the Franck-Condon model is fairly sufficient to describe the decrease in fluorescence intensity. The theoretical phonon energies of symmetric and anti-symmetric C=C, C-H, C-H out plane stretching modes were set up to be in good agreement with experimental data determined by Fourier transform infrared transmission spectroscopy for pristine P3HT film. (C) 2015 Elsevier B.V. All rights reserved.