P416
Analysis of photogeneration in azo/hydrazone layered organic photoconductors using thermally stimulated current.
Takayuki Shoda, Shinji Aramaki,and Tetsuo Murayama
Mitsubishi Chemical Corporation, Yokohama Research Center
A new application of thermally stimulated currents (TSCs) was developed, which can be used
to analyze generation, recombination, and separation of ion-pairs in layered organic photoconductors
(OPCs) containing azo and hydrazone compounds. The amount of collected carriers was measured varying
the condition of the irradiation (temperature, electric field) and the current measurement
(electric field).
Generation, recombination and separation processes of ion-pairs were analyzed by comparing
temperature and/or electric field dependence of carrier generation efficiency among
the layered OPC samples. The OPC sample using the high sensitive unsymmetrical azo pigment
had higher quantum efficiency of ion-pair generation than the OPC sample using the symmetrical
azo pigment when the same CTM was used in the samples. The OPC sample using the more mobile
CTM had higher quantum efficiency of ion-pair generation than the OPC sample using the less
mobile CTM when the same azo pigment was used.
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