Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy
- 15 August 2002
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 92 (4) , 1902-1905
- https://doi.org/10.1063/1.1495527
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−1. 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 α-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.This publication has 18 references indexed in Scilit:
- Crystal Structure of Tris(8-quinolinolato)aluminum(III)-Ethyl Acetate(1/0.5)Analytical Sciences, 1996
- Crystallization of organic thin films for electroluminescent devicesThin Solid Films, 1996
- Molecular design for nonpolymeric organic dye glasses with thermal stability: relations between thermodynamic parameters and amorphous propertiesThe Journal of Physical Chemistry, 1993
- Denatured tris(quinolin-8-olato)aluminium: a new material for organic electroluminescent cellsJournal of Materials Chemistry, 1992
- Organic electroluminescent diodesApplied Physics Letters, 1987
- Reduced Fluorescence from Tris-(8-Quinolinolato) Aluminum(III) in the Presence of its Fe(III) AnalogApplied Spectroscopy, 1979
- Proton nuclear magnetic resonance studies of 8-quinolinol and several of its metal complexesAnalytical Chemistry, 1968
- On the Far Infrared Spectra of the Tris-oxinato Complexes of Al(III), Fe(III), and Co(III) in Chloroform Solution.Acta Chemica Scandinavica, 1968
- Infra-red absorption spectra of metal chelates derived from 8-hydroxyquinoline, 2-methyl-8-hydroxyquinoline, and 4-methyl-8-hydroxyquinolineSpectrochimica Acta, 1956
- Infrared Spectra of Magnesium and Bismuth 8-QuinolinolatesJournal of the American Chemical Society, 1954