Melih Sener and Klaus Schulten.
Physical principles of efficient excitation transfer in light
harvesting.
In David L. Andrews, editor, Energy Harvesting Materials, pp.
1-26. World Scientific, Singapore, 2005.
SENE2005
After light absorption the primary process in light harvesting is the
transfer of excitation to a reaction center which facilitates a separation of
charge across a cell membrane. The physical principles underlying
excitation transfer are explained. Theoretical methods for the description
of the excitation migration process, including an expansion for
excitation lifetime in terms of repeated trapping and subsequent
detrapping events and the construction of representative pathways for
excitation transfer based on mean first passage times, are presented.
Measures for robustness and optimality of excitation transfer in terms of
quantum yield are introduced. Photosystem I (PSI) is used as an example
to illustrate the methods discussed. Some conclusions for the design of
artificial light harvesting systems are also discussed.
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