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Photographic ScienceAdvances in Nanoparticles, J-Aggregates, Dye Sensitization, and Organic Devices$
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Tadaaki Tani

Print publication date: 2011

Print ISBN-13: 9780199572953

Published to Oxford Scholarship Online: January 2012

DOI: 10.1093/acprof:oso/9780199572953.001.0001

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Organic Semiconductors and J-Aggregated Dyes

Organic Semiconductors and J-Aggregated Dyes

(p.250) 10 Organic Semiconductors and J-Aggregated Dyes
Photographic Science

Tadaaki Tani

Oxford University Press

Structure, property, and performance of organic semiconductors are analyzed in light of those of J-aggregated dyes on AgX grains for color films, including molecular alignment in their layers, absorption spectra, electronic structure of organic layers and their interfaces with substrates, charge transfer across the above interfaces, production process, and durability of organic devices. It is noted that single-crystalline J-aggregated mono-molecular dye layers on tabular AgX grains as substrates for color films serve as organic devices with efficient light absorption, long diffusion length of excitons, and efficient dissociation of excitons for charge separation followed by rapid transport of electronic carriers in the substrates.

Keywords:   organic semiconductor, J-aggregate, dye sensitization, exciton, charge separation, electron transfer, interface, electronic transport

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