Abstract
Dry micrometer-thick crystalline photosystem I (PSI) has been shown to generate unprecedented large photovoltage under illumination. We use variable-temperature Kelvin probe force microscopy to show that deep acceptor centers are responsible for this anomalous photovoltage. We assumed that these centers are located close to the positively charged FB2+ clusters, forming a coupled center that effectively captures the photoexcited electron into a deep state. We extract the main inherent parameters of the deep centers, which are extremely important in the potential use of photosynthetic proteins in various optoelectronic devices. (Graph Presented).
Original language | English |
---|---|
Pages (from-to) | 1374-1379 |
Number of pages | 6 |
Journal | Journal of Physical Chemistry B |
Volume | 119 |
Issue number | 4 |
DOIs | |
State | Published - 29 Jan 2015 |