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Diffusion-Limited Energy Transfer in Blends of Oligofluorenes with an Anthracene Derivative

Title data

Albuquerque, Rodrigo Q. ; Hofmann, Christiane C. ; Köhler, Jürgen ; Köhler, Anna:
Diffusion-Limited Energy Transfer in Blends of Oligofluorenes with an Anthracene Derivative.
In: The Journal of Physical Chemistry B. Vol. 115 (2011) Issue 25 . - pp. 8063-8070.
ISSN 1520-5207
DOI: https://doi.org/10.1021/jp202333w

Official URL: Volltext

Abstract in another language

Organic semiconductor devices such as light-emitting diodes and solar cells frequently comprise a blend of molecular or polymeric materials. Consequently, resonant energy transfer between the components plays a major role in determining device performance. Energy transfer may take place through either single-step donor–acceptor transfer, realized for example as Förster transfer, or as a sequence of donor–donor transfers toward the acceptor site. Here we use a well-defined model system comprising an oligofluorene trimer, pentamer, or heptamer as the donor in combination with an anthracene derivative as the acceptor in order to study the rate and mechanism of energy transfer in thin films by time-resolved photoluminescence spectroscopy. We find the transfer process to be entirely dominated by sequential donor–donor transfer. In addition, we observe a strong dependence on oligomer length with an optimum energy transfer rate for the pentamer.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie - Univ.-Prof. Dr. Anna Köhler
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Lehrstuhl Experimentalphysik II - Optoelektronik weicher Materie
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 13 Feb 2015 12:19
Last Modified: 13 Feb 2015 12:19
URI: https://eref.uni-bayreuth.de/id/eprint/6724