Аннотация: Abstract Photoconductivity and optical absorption in the solid state of the organic semi-conductors, that is, isoviolanthrone (I), violanthrone (II), isoviolanthrene (III), violanthrene (IV), pyranthrone (V), pyranthrene (VI), ovalene (VII), flavanthrone (VIII), indanthrone (IX) and indanthrazine (X) were measured. From the threshold values of the spectral response of the photoelectric current and optical absorption in the solid state, the energy gap between the full band and the empty band were estimated as (I) 0.93 eV, 0.7 eV, (II) 0.84 eV, 0.75 eV, (III) 0.85 eV, —, (IV) 0.88 eV, 0.8 eV, (V) 1.14 eV, 0.85 eV, (VI) 0.85 eV, 0.8 eV, (VII) 1.20 eV, 1.2 eV, (VIII) 0.76 eV, 0.75 eV, (IX) 0.74 eV, 0.65 eV, (X) 0.80 eV, 0.7 eV respectively. Also from the experimental facts that the photocurrent is proportional to the applied potential arid to the light intensity, the author thinks that the photocurrent observed here is a primary current. These results, photoconductivity and absorption spectra, are in good agreement with that estimated from the temperature dependence of the electrical resistivity. It may be reasonable that this agreement is due to the fact that the organic semi-conductors studied here are intrinsic ones having molecular lattice.
Год издания: 1954
Издательство: Oxford University Press
Источник: Bulletin of the Chemical Society of Japan
Ключевые слова: Photochemistry and Electron Transfer Studies, Molecular Junctions and Nanostructures, Organic Electronics and Photovoltaics
Открытый доступ: bronze
Том: 27
Выпуск: 1
Страницы: 22–27
