Abstract
Fabrication and characterization of organic photodetectors based on copper phthalocyanine and fullerenes are presented. We study current-voltage and impedance characteristics of the devices under dark and varied illumination conditions. The current-voltage characteristics in the reverse bias show little or no dark current and large photocurrent. The results show that photocurrent in the devices is associated with a decrease in bulk resistance and an increase in dielectric constant of the active material.
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