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Photocurrent Multiplication in Pigment Dispersion Films and Its Application to Optoelectronic Devices

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Photocurrent multiplication in pigment-dispersed polymer films has been observed for the first time. The multiplication rate reached more than 2 × 104 rivaling the usual devices prepared by vacuum deposition. Based on the advantage of film uniformity and easy process originating in polymers, three kinds of applications of photocurrent multiplication to optoelectronic devices were demonstrated. First, we developed amplified photoreceptor devices with photogeneration efficiency exceeding unity, which have a great potential for high-sensitive or high-γ photoreceptors. Next, we fabricated organic light transducer combined with organic EL and achieved wavelength conversion from nearinfrared to visible light and light amplification of input light. Finally, we suggested the organic optical logic gate by the light transducer with designed relationship between input and output light intensity, and demonstrated operation “OR” for two input images.
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Document Type: Research Article

Publication date: 2001-01-01

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