Morphological study of aluminum tris(8-hydroxyquinoline) thin films using infrared and Raman spectroscopy
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چکیده
Articles you may be interested in Formation of ordered films of axially bridged aluminum phthalocyanine [(tBu)4PcAl]2O via magnetic field-induced reaction J. Infrared absorption study of hydrogen incorporation in thick nanocrystalline diamond films Appl. Direct interband transitions in tris-(8-hydroxyquinoline) aluminum thin films Infrared organic light emitting diodes using neodymium tris-(8-hydroxyquinoline) Radiative recombination mechanisms in aluminum tris(8-hydroxyquinoline): Evidence for triplet exciton recombination 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 Ϫ1. 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 ␣-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 .
منابع مشابه
Infrared organic light emitting diodes using neodymium tris-(8-hydroxyquinoline)
Articles you may be interested in White light emission from exciplex using tris-(8-hydroxyquinoline)aluminum as chromaticity-tuning layer Appl. Radiative recombination mechanisms in aluminum tris(8-hydroxyquinoline): Evidence for triplet exciton recombination Electroabsorption spectroscopy on tris-(8-hydroxyquinoline) aluminum-based light emitting diodes
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