Thickness dependence of the fluorescence lifetime in films of bisfluorene-cored dendrimers

Jean Charles Maurice Ribierre, A. Ruseckas, P. E. Shaw, H. S. Barcena, P. L. Burn, I. D.W. Samuel

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

The effect of film thickness on fluorescence lifetime, quantum yield, and exciton diffusivity is studied in first-generation bisfluorene-cored dendrimers with E-stilbenyl and biphenyl-based dendrons. A decrease of the fluorescence lifetime and quantum yield is observed in films thinner than 50 nm spin-coated on fused silica substrates. The radiative decay of the singlet excited-state and singlet exciton diffusion rates are independent of the film thickness within a 20% uncertainty. The fluorescence lifetime of dendrimers dispersed in an inert host is also independent of film thickness. The nonradiative decay rate increases by a factor of 4 in thin films of dendrimers with first-generation E-stilbenyl dendrons. The same effect is observed on different glass and sapphire substrates, and it is much weaker in the dendrimer with first-generation biphenyl dendrons, which allows us to rule out quenching by substrate. The data can be explained by long-range (dipole - dipole) energy transfer to quenching sites concentrated at the surface of thin films. The results contribute to understanding of the thin film photophysics and will help development of light-emitting devices.

Original languageEnglish
Pages (from-to)20463-20468
Number of pages6
JournalJournal of Physical Chemistry C
Volume112
Issue number51
DOIs
Publication statusPublished - Dec 1 2008

Fingerprint

Dendrimers
dendrimers
Fluorescence
Film thickness
Thin films
life (durability)
fluorescence
film thickness
Quantum yield
thin films
Excitons
Quenching
Substrates
quenching
excitons
dipoles
Fused silica
Excited states
Sapphire
Energy transfer

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Ribierre, J. C. M., Ruseckas, A., Shaw, P. E., Barcena, H. S., Burn, P. L., & Samuel, I. D. W. (2008). Thickness dependence of the fluorescence lifetime in films of bisfluorene-cored dendrimers. Journal of Physical Chemistry C, 112(51), 20463-20468. https://doi.org/10.1021/jp805429d

Thickness dependence of the fluorescence lifetime in films of bisfluorene-cored dendrimers. / Ribierre, Jean Charles Maurice; Ruseckas, A.; Shaw, P. E.; Barcena, H. S.; Burn, P. L.; Samuel, I. D.W.

In: Journal of Physical Chemistry C, Vol. 112, No. 51, 01.12.2008, p. 20463-20468.

Research output: Contribution to journalArticle

Ribierre, JCM, Ruseckas, A, Shaw, PE, Barcena, HS, Burn, PL & Samuel, IDW 2008, 'Thickness dependence of the fluorescence lifetime in films of bisfluorene-cored dendrimers', Journal of Physical Chemistry C, vol. 112, no. 51, pp. 20463-20468. https://doi.org/10.1021/jp805429d
Ribierre JCM, Ruseckas A, Shaw PE, Barcena HS, Burn PL, Samuel IDW. Thickness dependence of the fluorescence lifetime in films of bisfluorene-cored dendrimers. Journal of Physical Chemistry C. 2008 Dec 1;112(51):20463-20468. https://doi.org/10.1021/jp805429d
Ribierre, Jean Charles Maurice ; Ruseckas, A. ; Shaw, P. E. ; Barcena, H. S. ; Burn, P. L. ; Samuel, I. D.W. / Thickness dependence of the fluorescence lifetime in films of bisfluorene-cored dendrimers. In: Journal of Physical Chemistry C. 2008 ; Vol. 112, No. 51. pp. 20463-20468.
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