Electrical characteristics of chlorophyll a films
- 1 January 1971
- journal article
- research article
- Published by Royal Society of Chemistry (RSC) in Discussions of the Faraday Society
- Vol. 51, 202-211
- https://doi.org/10.1039/df9715100202
Abstract
Dark conductivity and photovoltaic effects have been investigated in thin film samples of chlorophyll a. Samples were fabricated by depositing monomolecular layers of chlorophyll a on to conducting glass and metal substrates. The dependence of the dark current on temperature and voltage in 10 monolayer samples at low voltages (< 500 mV) is consistent with a conductivity tunnelling process. At higher voltages the conductivity characteristics are consistent with conductivity tunnelling, Schottky emission and the Frenkel-Poole effect. An enhanced photovoltaic effect is found in chlorophyll a films (100 monolayers) composited with electron acceptor and donor materials. The results are discussed in terms of energy migration in photosynthetic units.Keywords
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