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Influence of Dye Aggregation on Photosensitized Hole Injection into Anthracene Crystals from Langmuir‐Blodgett Monolayers Containing Cyanine Dyes
Author(s) -
van Der Auweraer M.,
Willig F.
Publication year - 1985
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.198500042
Subject(s) - cyanine , chemistry , anthracene , monolayer , monomer , photochemistry , j aggregate , langmuir–blodgett film , excited state , absorption (acoustics) , fluorescence , polymer , organic chemistry , molecule , optics , biochemistry , physics , nuclear physics
Monolayers containing cyanine dyes can be transferred to anthracene crystals and are able to inject holes into the crystal upon excitation. At low dye coverages only the dye monomer injects holes while at higher coverages energy transfer to aggregates is the most important decay process of an excited dye monomer. These aggregates are also able to inject holes but with a more than ten times smaller efficiency. The occurrence of dye aggregates is confirmed by the absorption spectra of the monolayers. In this system non‐geminate recombination remains an unimportant pathway even at high dye coverages.