Abstract
IN 1935, Suhrmann found that the evaporation of a hydrocarbon, naphthalene or anthracene, on to a sodium (or potassium) film, promotes the efficiency of photoelectric emission of the alkali metal1. On the other hand, the electrical properties of the solid-state complexes of polycyclic aromatics involving alkali metals, sodium, potassium and lithium, were investigated by Ubbelohde et al.2–6. Further, Setton and Bazin have reported on the photosensitivity of the complexes between alkali metals and graphite7. Recently, we found that the inter-layer junctions between alkali metals and aromatic hydrocarbons show strong photovoltaic behaviour under illumination by visible light8. These reactions may be due to sharing of conduction electrons of alkali metal (as an electron donor) with partner aromatic molecules (as an electron acceptor) which has new electronic properties.
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References
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INOKUCHI, H., HARADA, Y. Photoelectric Emission of the Complexes between Cæsium and Polycyclic Aromatic Compounds. Nature 198, 477–478 (1963). https://doi.org/10.1038/198477a0
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DOI: https://doi.org/10.1038/198477a0
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