Blue electroluminescence from tris-(8-hydroxyquinoline) aluminum thin film

X. L. Xu, X. H. Chen, Y. B. Hou, Z. Xu, X. H. Yang, S. G. Yin, Z. J. Wang, X. R. Xu, Shu Ping Lau, B. K. Tay

Research output: Journal article publicationJournal articleAcademic researchpeer-review

47 Citations (Scopus)


We report the fabrication of symmetrically configured alternating-current (ac) light-emitting devices based on tris-(8-hydroxyquinoline) aluminum (Alq3). The devices consist of an emissive layer of Alq3sandwiched between two layers of silicon dioxide. A blue emission at 457 nm could be obtained from the devices under the ac driving. The blue emission corresponds to the direct recombination from the lowest unoccupied molecular orbital (LUMO) to the highest occupied molecular orbital (HOMO) of Alq3. According to the dependence of luminescent intensity on the voltage and frequency, we ascribed this direct recombination to the dissociation of Frenkel excitons and the charge accumulation at the interface of SiO2and Alq3.
Original languageEnglish
Pages (from-to)420-424
Number of pages5
JournalChemical Physics Letters
Issue number4
Publication statusPublished - 28 Jul 2000
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry


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