Chapter

Dye Sensitization

Tadaaki Tani

in Photographic Science

Published in print August 2011 | ISBN: 9780199572953
Published online January 2012 | e-ISBN: 9780191731266 | DOI: http://dx.doi.org/10.1093/acprof:oso/9780199572953.003.0005
Dye Sensitization

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Dye sensitization with J-aggregated cyanine dyes on tabular AgX grains for color films is characterized by the light absorption and aggregate formation of dyes, electronic structure of the interface between them, efficiency, and rate of the electron transfer from excited dye molecules to AgX grains, and back electron transfer. It is noted that J-aggregates on AgX grains are single-crystalline mono-molecular layers, and that their formation enhances the adsorption of dye molecules to AgX grains and the electron transfer by bringing about small rearrangement energy in the absence of the inverted region in the framework of the Marcus theory. A detailed description is made on the progress for establishing the electron transfer mechanism for dye sensitization.

Keywords: cyanine dye; J-aggregate; electron transfer; Marcus theory; rearrangement energy; inverted region; back electron transfer

Chapter.  20062 words.  Illustrated.

Subjects: Atomic, Molecular, and Optical Physics

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