Picosecond electron transfer from photosynthetic reaction center protein to GaAs
Lior Sepunaru1, Irena Tsimberov, Ludmila Forolov
1Department of Biochemistry, Tel Aviv University, Tel Aviv 69978, Israel.
Abstract:
An extremely fast electron transfer through an electronically coupled junction between covalently bound oriented photosynthetic reaction center protein photosystem I (PS I) and n-GaAs was measured by time-resolved photoluminescence. It was found that the n-GaAs band edge luminescence intensity increased by a factor of 2, and the fast exponential decay constant was increased by a factor of 2.6 following the PS I self-assembly. We attribute this to picosecond electron transfer from the PS I to the n-GaAs surface states.
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