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Morphological study of aluminium tris(8-hydroxyquinoline) using IR and Raman spectroscopy

Morphological study of aluminium tris(8-hydroxyquinoline) using IR and Raman spectroscopy
Morphological study of aluminium tris(8-hydroxyquinoline) using IR and Raman spectroscopy
We present comprehensive Raman spectra for thin films of Alq3, annealed at various temperatures up to 300 C, over the range of 70-1800 /cm. These spectra give strong evidence for structural rearrangement of thin films of Alq3 upon annealing at temperatures above 200 C. Needle like crystals are observed to grow in the films and confirmed to be comprised of the a Alq3 polymorph using the low energy Raman spectra. Furthermore, no evidence of the fac isomer or thermal interconversion between the mer and fac isomers of Alq3 was observed in either the infrared or Raman spectra of the thin films or powder. These results may have implications for the long-term efficiencies of organic light emitting diodes incorporating thin films of Alq3.
0021-8979
1902-1905
Curry, R.J.
1ae2a4da-7efe-4333-a34e-0ec20ae95154
Gillin, W.P.
1b7aadc3-2052-446b-bb61-4b962496019a
Clarkson, J.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Batchelder, D.N.
bd3f1ae2-fd15-427c-97f9-8687f90f4561
Curry, R.J.
1ae2a4da-7efe-4333-a34e-0ec20ae95154
Gillin, W.P.
1b7aadc3-2052-446b-bb61-4b962496019a
Clarkson, J.
3b060f63-a303-4fa5-ad50-95f166df1ba2
Batchelder, D.N.
bd3f1ae2-fd15-427c-97f9-8687f90f4561

Curry, R.J., Gillin, W.P., Clarkson, J. and Batchelder, D.N. (2002) Morphological study of aluminium tris(8-hydroxyquinoline) using IR and Raman spectroscopy. Journal of Applied Physics, 92 (4), 1902-1905. (doi:10.1063/1.1495527).

Record type: Article

Abstract

We present comprehensive Raman spectra for thin films of Alq3, annealed at various temperatures up to 300 C, over the range of 70-1800 /cm. These spectra give strong evidence for structural rearrangement of thin films of Alq3 upon annealing at temperatures above 200 C. Needle like crystals are observed to grow in the films and confirmed to be comprised of the a Alq3 polymorph using the low energy Raman spectra. Furthermore, no evidence of the fac isomer or thermal interconversion between the mer and fac isomers of Alq3 was observed in either the infrared or Raman spectra of the thin films or powder. These results may have implications for the long-term efficiencies of organic light emitting diodes incorporating thin films of Alq3.

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Published date: 2002

Identifiers

Local EPrints ID: 15020
URI: https://eprints.soton.ac.uk/id/eprint/15020
ISSN: 0021-8979
PURE UUID: edf2f9a1-2acf-4811-83c1-416a3a523072

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Date deposited: 08 Apr 2005
Last modified: 15 Jul 2019 19:32

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Contributors

Author: R.J. Curry
Author: W.P. Gillin
Author: J. Clarkson
Author: D.N. Batchelder

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