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Relationship between Organic Thin Films and Photostimulated Exoelectron Emission

The effect of organic thin films on photostimulated exoelectron emission from cut aluminum was studied under the illumination of monochromatic visible light. The organic compounds used were n-octadecane, stearyl alcohol, stearyl amine, stearic acid and methyl stearate. Exoelectron emission from cut aluminum was observed at stimulation energies of 2.8–2.9 eV. The emission intensity decreased exponentially with the film thickness. The exoelectron emission threshold was affected not only by the film thickness but also by the film material. In the case of a multi-layered film composed of amine and acid, the emission behavior was affected by the film structure.