Photochemical production of electroluminescent image

A polymer containing donorN-epoxypropylcarbazolyl groups and the acceptor tris(8-quinolinolato) aluminum (Alq3) was shown to form a light-sensitive, acid-producing polymeric composition. The acid in the presence of 8-quinolinol (8-hydroxyquinoline) ensured photochemical dissolution of aluminum in th...

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Bibliographic Details
Published in:High energy chemistry 2000-09, Vol.34 (5), p.309-314
Main Authors: Grishina, A. D., Tedoradze, M. G., Kolesnikov, V. A., Mal’tsev, E. I., Brusentseva, M. A., Kostenko, A. I., Popov, A. F., Vannikov, A. V.
Format: Article
Language:English
Subjects:
Addition polymerization
Aluminum
Composition
Dissolution
Electroluminescence
Exposure
Hydroxyquinoline
Polymers
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Summary:A polymer containing donorN-epoxypropylcarbazolyl groups and the acceptor tris(8-quinolinolato) aluminum (Alq3) was shown to form a light-sensitive, acid-producing polymeric composition. The acid in the presence of 8-quinolinol (8-hydroxyquinoline) ensured photochemical dissolution of aluminum in the polyeric layer, yielding additionally organic aluminum complexes, such as Alq3, Alq2+, and Alq2+, and Alq3-con-taining polymers. This led to a emergence of electroluminescence (EL) upon application of a potential difference to a sandwich diode representing transparent anode/exposed polymer layer/aluminum cathode. Electroluminescence did not appear at an Alq3 concentration of 6 wt % and less in the composition, and only partial dissolution of the aluminum film after its deposition on the exposed polymeric layer provided the emergence of EL whose intensity increased with increasing the dose absorbed by the polymer. The addition of the chemical sensitizer dimethylaminobenzaldehyde to the composition triggered the conventional process of chemical amplification which consists in thermal buildup of the acid in exposed area. This provided a significant increase in concentration of organoaluminum complexes and enhancement of EL intensity.
ISSN:0018-1439
1608-3148
DOI:10.1007/BF02762684