Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy

R. J. Curry; William P. Gillin; J. Clarkson; D. N. Batchelder

doi:10.1063/1.1495527

Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy

R. J. Curry^*, William P. Gillin, J. Clarkson, D. N. Batchelder

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

We present comprehensive Raman spectra for thin films of Alq ₃, annealed at various temperatures up to 300°C, over the range of 70-1800 cm ^-1. These spectra give strong evidence for structural rearrangement of thin films of Alq ₃ upon annealing at temperatures above 200°C. Needle like crystals are observed to grow in the films and confirmed to be comprised of the α-Alq ₃ polymorph using the low energy Raman spectra. Furthermore, no evidence of the fac isomer or thermal interconversion between the mer and fac isomers of Alq ₃ 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 Alq ₃.

Original language	English
Pages (from-to)	1902-1905
Number of pages	4
Journal	Journal of Applied Physics
Volume	92
Issue number	4
DOIs	https://doi.org/10.1063/1.1495527
Publication status	Published - 15 Aug 2002

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title = "Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy",

abstract = "We present comprehensive Raman spectra for thin films of Alq 3, annealed at various temperatures up to 300°C, over the range of 70-1800 cm -1. These spectra give strong evidence for structural rearrangement of thin films of Alq 3 upon annealing at temperatures above 200°C. Needle like crystals are observed to grow in the films and confirmed to be comprised of the α-Alq 3 polymorph using the low energy Raman spectra. Furthermore, no evidence of the fac isomer or thermal interconversion between the mer and fac isomers of Alq 3 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 Alq 3.",

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year = "2002",

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AU - Curry, R. J.

AU - Gillin, William P.

AU - Clarkson, J.

AU - Batchelder, D. N.

PY - 2002/8/15

Y1 - 2002/8/15

N2 - We present comprehensive Raman spectra for thin films of Alq 3, annealed at various temperatures up to 300°C, over the range of 70-1800 cm -1. These spectra give strong evidence for structural rearrangement of thin films of Alq 3 upon annealing at temperatures above 200°C. Needle like crystals are observed to grow in the films and confirmed to be comprised of the α-Alq 3 polymorph using the low energy Raman spectra. Furthermore, no evidence of the fac isomer or thermal interconversion between the mer and fac isomers of Alq 3 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 Alq 3.

AB - We present comprehensive Raman spectra for thin films of Alq 3, annealed at various temperatures up to 300°C, over the range of 70-1800 cm -1. These spectra give strong evidence for structural rearrangement of thin films of Alq 3 upon annealing at temperatures above 200°C. Needle like crystals are observed to grow in the films and confirmed to be comprised of the α-Alq 3 polymorph using the low energy Raman spectra. Furthermore, no evidence of the fac isomer or thermal interconversion between the mer and fac isomers of Alq 3 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 Alq 3.

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JO - Journal of Applied Physics

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Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy

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