Excitations in organic multilayers

Agranovich, V. M. and Kamchatnov, A. M. (2003). Optics and Nonlinear-ities of Excitons in Organic Multilayered Nanostructures and Superlattices. In Agranovich, V. M. and Bassani, G. F. (Eds.), Electronic Excitations in Organic Based Nanostructures. Thin Films and Nanostructures 31. Elsevier Academic Press, Amsterdam, pp. 185-220. 

Another significant merit of organic multilayer structures is keeping the energy of molecular excitons from dissipating into the metal electrodes — in other words, the retardation effect between an excited molecule and a metal mirror.53 It is well known that if excited molecules located near a metal electrode are less than 20 nm, the nonradiative energy transfer to the metal electrode dominantly occurs. Thus, the 50-70-nm-thick HTL and ETL effectively protect molecular excitons from the dissipation process. 

The synthesis, characterization and properties of nanomaterials have become very active areas of research in the last few years. In particular, nanostructured materials assembled by means of supramolecular organization offer many exciting possibilities. These include self-assembled monolayers and multilayers with different functionalities, intercalation in preassembled layered hosts and inorganic three-dimensional networks. The reader is referred to the special issue of Chemistry of Materials91 for an overview of present day interests. There are many recent reviews on the varied aspects of nanomaterials. The work of Alivisatos92 on the structural transitions, elec-... 

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