Effects of chemical and physical agents on the emission properties of Alq3 films

G. Baldacchini, T. Baldacchini, A. Pace, R.B. Pode

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Tris(8-hydroxyquinoline)aluminum (Alq3)-based organic light emitting diodes are highly susceptible to environmental conditions which severely limit their lifetime. In particular, moisture and oxygen play an important role in the degradation processes. In order to study those effects more deeply, annealing processes of Alq3 films have been performed in various atmospheres, and they have confirmed the physical and chemical destructive actions of temperature, oxygen, and water, the last one more effective than the previous two agents. However, also a sizeable increase of the photoluminescence has been discovered by annealing in humidified atmospheres, especially air. Due to the complexity of the matter, it is not yet clear whether this important effect can be ascribed to the temperature alone or to the combined action of temperature and water, but almost certainly it is related to the phase transitions of the molecular material itself.
Original languageEnglish
Pages (from-to)-
JournalJournal of the Electrochemical Society
Issue number1
Publication statusPublished - 2004
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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