EPR and TEM Characterization of Electroluminescent Alq3

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EPR and TEM investigations on sublimated solid Alq3, [tris(8- hydroxyquinoline)aluminum(III)] are reported. Different paramagnetic centers in microcrystalline Alq3 fractions as synthesized and annealed are observed. Their nature, thermal treatment dependence, as well as correlation with the crystal structure are analyzed. The existence of randomly oriented triplets and quartets in annealed Alq3 fractions is evidenced from the temperature dependence of X- and Q-band EPR spectra. The spin Hamiltonian parameters are given and proposals for the model structures are made.

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Periodical:

Materials Science Forum (Volumes 514-516)

Edited by:

Paula Maria Vilarinho

Pages:

133-137

DOI:

10.4028/www.scientific.net/MSF.514-516.133

Citation:

M. N. Grecu et al., "EPR and TEM Characterization of Electroluminescent Alq3 ", Materials Science Forum, Vols. 514-516, pp. 133-137, 2006

Online since:

May 2006

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$35.00

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