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Photoluminescence of Nanocrystalline Bismuth Titanate Thin Films Synthesized by the Sol-Gel Method
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EPR and TEM Characterization of Electroluminescent Alq3
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EPR and TEM Characterization of Electroluminescent Alq3

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Abstract:

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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Advanced Materials Forum III View Preview

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Periodical:

Materials Science Forum (Volumes 514-516)

Pages:

133-137

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.514-516.133

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Online since:

May 2006

Authors:

Maria Nicoleta Grecu, Cornel Ghica, Anisoara Mirea, Voicu V. Grecu, Markus Schwoerer

Keywords:

Alq3, EPR, Paramagnetic Centers, TEM, Thermal Treatment

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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