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Georgia Journal of Science

Article Title

INVESTIGATION OF ALQ3 MOLECULES DISSOLVED IN CHCL3 AND EMPLOYED AS THIN-FILMS

Abstract

We investigate the optical and electrical properties of Tris-(8-hydroxyquinoline)aluminum (Alq3), which has been used as the sole electron-transport material in various optoelectronic applications. The compound is highly emissive both in solution and thin-film configurations. Alq3 dissolved in CHCL3 reveals two absorption bands at ~259 and 388nm. When the solution endures reduction to millimolar concentrations, two vibronic progressions are resolved at ~334 and ~319nm. The thin-films were fabricated by depositing Alq3 onto borosilicate glass using the spin-coating method to achieve varying degrees of thickness. In thin-film samples, it is found that a prominent narrow absorption peak emerges at ~259 nm with a broad band at ~360 nm. The film fabrication method and optoelectronic properties are presented in detail.

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