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  • Articles  (6)
  • photoconductivity  (6)
  • Wiley-Blackwell  (6)
  • Wiley
  • Electrical Engineering, Measurement and Control Technology  (6)
  • 1
    Electronic Resource
    Electronic Resource
    Photoconductivity generated by X-rays in copper phthalocyanine (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 6 (1996), S. 363-366 
    Details
    ISSN: 1057-9257
    Keywords: photoconductivity ; organic materials ; phthalocyanine ; X-rays ; space charge ; recombination ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Experimental data on photocurrents induced by X-rays in vacuum-evaporated copper phthalocyanine layers are presented and a short analysis is included. The photocurrents were measured as a function of applied voltage, X-ray intensity and ambient air pressure. The experimental data are in agreement with the theoretical description of photocurrents with respect to the important role of the space charge and charge carrier recombination.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Photoelectrical properties of substituted polyacetylenes (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 6 (1996), S. 325-329 
    Details
    ISSN: 1057-9257
    Keywords: photoconductivity ; polyacetylene ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Three new polymers, poly(m-iodophenylacetylene), poly(p-iodophenylacetylene) and poly[p(trilsopropylsilylethynyl)phenylacetylene], were prepared and their photoelectrical properties were studied. The experimental results suggest that the photogeneration of charge carriers in these polymers proceeds via the creation of Intermediate Coulomb force bound charge pairs and their subsequent dissociation in the external electric field by the Onsager mechanism. The electron-withdrawing and electron-donating groups attached to the phenyl ring were found to influence the photogeneration process substantially.
    Additional Material: 3 Ill.
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    Paper (German National Licenses)
  • 3
    Electronic Resource
    Electronic Resource
    Photoenhanced currents in pentacene layers (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 6 (1996), S. 379-382 
    Details
    ISSN: 1057-9257
    Keywords: photoconductivity ; organic materials ; pentacene ; space charge ; recombination ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Photoenhanced current measurements carried out on polycrystalline pentacene layers are presented. A new approach to the description of the photoenhanced current is proposed. The inclusion of generation and recombination processes induced by oxygen centres enables us to explain the experimental current-voltage and current-light intensity relations.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Peculiarities of radiative recombination in amorphous molecular semiconductors doped with polymethine dye (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 8 (1998), S. 201-209 
    Details
    ISSN: 1057-9257
    Keywords: amorphous molecular semiconductors ; electron-hole pairs ; excitons ; photoconductivity ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Processes of charge carrier photogeneration and recombination are investigated in films of poly-N-epoxypropylcarbazole doped with polymethine dye. Films with blocking contacts were illuminated with light from either the region of dye absorption or beyond this region. The kinetics of accumulation and relaxation of electron-hole pairs with lifetimes greater than tens or hundreds of seconds was studied. It is presumed that the reason for the growth of recombination luminescence intensity in an external electric field is connected with the increase in efficiency of radiative recombination stimulated by electrons captured from photogenerated excitons. © 1998 John Wiley & Sons, Ltd.
    Additional Material: 6 Ill.
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  • 5
    Electronic Resource
    Electronic Resource
    Features of the exciplex mechanism of charge photogeneration in amorphous molecular semiconductors doped with the dye rhodamine 6G (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 7 (1997), S. 207-211 
    Details
    ISSN: 1057-9257
    Keywords: amorphous molecular semiconductor ; dye ; triplet exciplex ; photoconductivity ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: Results of investigation of the processes of charge carrier photogeneration and relaxation within the exciplex absorption region in films of poly-N-epoxypropylcarbazole doped with the dye rhodamine 6G are given. When the films are illuminated with light from the dye absorption region, new centres of charge photogeneration appear that absorb within the exciplex absorption region. It is shown for the first time that these centres have a long lifetime at room temperature and their temporal concentration changes correlate with EPR photosignal changes. The concentration of centres is independent of the external electric field strength during their generation. These centres are identified as triplet exciplexes. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 2 Ill.
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  • 6
    Electronic Resource
    Electronic Resource
    Dissociation of electron-hole pairs interacting with triplet excitons in amorphous molecular semiconductors (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Advanced Materials for Optics and Electronics 7 (1997), S. 255-261 
    Details
    ISSN: 1057-9257
    Keywords: amorphous molecular semiconductors ; electron-hole pairs ; excitons ; photoconductivity ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Notes: The photoconductivity of films of amorphous molecular semiconductors increases upon simultaneous photogeneration of singlet electron-hole pairs (EHPs) and triplet excitons and decreases upon photogeneration of triplet EHPs and triplet excitons. An increase in external electric field strength leads to a decrease in the effect of triplet excitons on the film photoconductivity caused by EHP dissociation. It is concluded that under increasing external electric field strength the mobility of charge carriers increases and the velocity of EHP dissociation becomes comparable with the velocity of spin conversion of EHPs interacting with triplet excitons. © 1997 John Wiley & Sons, Ltd.
    Additional Material: 3 Ill.
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