Photoemission from Polycyclic Aromatic Crystals in the Vacuum Ultraviolet Region. III. Aromatic Crystals and Charge-transfer Complexes

DOI PDF 被引用文献6件 参考文献9件 オープンアクセス

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公開日
1969-06-01
権利情報
  • https://academic.oup.com/pages/standard-publication-reuse-rights
DOI
  • 10.1246/bcsj.42.1481
公開者
Oxford University Press (OUP)

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<jats:title>Abstract</jats:title> <jats:p>The photoemission from various types of charge-transfer complexes, quinolinium-tetra-cyanoquinodimethane Q(TCNQ2 (I), dibenzophenothiazine (DBP)-dicyanodichloro-p-benzoquinone (DDQ)[(DBP)(DDQ)(II) and (DBP)2(DDQ)(III)], trinitrobenzene (TNB)-coronene (IV), and TNB-perylene (V),and also large polycyclic aromatic hydrocarbons, violanthrene A (VI), violanthrene B (VII), coronene (VIII), pyranthrene (IX), and pyranthrone (X), was observed in the vacuum ultraviolet region. The experimental equation Y ∝(E–E*)3, where Y is the quantum yield of photoemission; E, the incident photon energy, and E*, the threshold energy, was used to determine the ionization potential. The E*-values, as estimated from the experimental equation, were I=4.85 eV, II 4.99, III 4.75, IV 5.62, V 5.52, VI 5.06, VII 5.13, VIII 5.58, IX 5.04, and X=5.71 eV. A band structure scheme for these organic semiconductors was introduced to analyse the emission mechanism.</jats:p>

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