Thin organic layers for photography and electronic devices

Tani, Tadaaki; Seki, Kazuhiko; Yoshihara, Keitaro; Hanna, Junichi

doi:https://doi.org/10.1155/IJP/2006/18482

International Journal of Photoenergy

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Light-harvesting J-aggregates

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Volume 2006 | Article ID 018482 | https://doi.org/10.1155/IJP/2006/18482

Thin organic layers for photography and electronic devices

Tadaaki Tani,¹Kazuhiko Seki,²Keitaro Yoshihara,³and Junichi Hanna⁴

Received30 Mar 2006

Revised31 May 2006

Accepted20 Jun 2006

Published08 Oct 2006

Abstract

The dye sensitization in photography is achieved by thin layers of J-aggregated dyes on silver halide grains. Studies by Yoshihara et al. with picosecond and femtosecond spectroscopies have indicated that the migration of excitons in the dye layers plays important roles in their charge separation to inject electrons into the grains. Studies by Seki et al. with ultraviolet photoelectron spectroscopy have revealed that the electronic structure of the interface between dye layers and a substrate is characterized by the fact that the vacuum level of the former is lowered with respect to that of the latter by the electric double layer formed at the interface, and that this characteristic structure is generally valid for the interfaces between organic layers and substrates. Hanna et al. have confirmed the formation of such an electronic double layer at the interfaces between a liquid crystalline organic semiconductor and electrodes by analyzing the current voltage characteristics.

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Copyright

Copyright © 2006 Tadaaki Tani et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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