ABSTRACT
Photocurrent multiplication is the phenomenon in which the quantum efficiency of carrier generation exceeds unity. Highly sensitive photosensors whose photo-to-electrical conversion efficiency exceeds unity can be fabricated by utilizing the photocurrent multiplication phenomenon. A typical example of such devices is avalanche photodiodes, fabricated by the use of inorganic semiconductors [1]. In organic semiconductors, however, there have been no reports on the photocurrent multiplication, except for an early report by Kallman and Pope [2].
