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8163783 
Journal Article 
UV photoelectron spectroscopy of several one‐ and two‐component organic photoconductors 
Karl, N; Sato, N; Seki, K; Inokuchi, H; , 
1982 
Yes 
Journal of Chemical Physics
ISSN: 0021-9606
EISSN: 1089-7690 
77 
10 
4870-4878 
English 
Solid state photoelectron spectra have been measured at several UV wavelengths for vapor-deposited films of the organic photoconductors phenothiazine, anthracene, and carbazole and for the 1:1 donor:acceptor complexes of phenothiazine, carbazole, and acridine with the common acceptor pyromellitic dianhydride (PMDA). Differences in photoemission threshold energies of the one-component photoconductors are used to estimate hole trap depth energies for systems where one of the compounds is doped with another one. Further, the photoemission threshold values are used for predicting the energy differences of charge transfer transitions in donor:acceptor crystals with a common acceptor. The reliability of this kind of estimation for the above mentioned substances is tested. In addition, by comparing the threshold values obtained for the D:A complexes with those of the neat donors, it is found (in confirmation of an earlier result) that complex formation with PMDA tends to increase the ionization threshold of the respective donor by 0.2-0.3 eV. © 1982 American Institute of Physics.