Room temperature vibrational photoluminescence and field emission of nanoscaled tris-(8-hydroxyquinoline) aluminum crystalline film

Jian-Jong Chiu, Bene; Way-Seen Wang; Chi-Chung Kei, Bene; Chu-Pey Cho, Bene; Tsong P. Perng, Bene; Pei-Kuen Wei; Sheng-Yu Chiu, Bene
December 2003
Applied Physics Letters;12/1/2003, Vol. 83 Issue 22, p4607
Academic Journal
The nanoscaled tris-(8-hydroxyquinoline) aluminum (AlQ[sub 3]) crystalline film was synthesized by vapor condensation. It was stacked with nanometer-sized rods, approximately 100 nm wide and 1 μm long, and had a surface roughness of about 100 nm. The vibronic progression with several separated peaks was observed in the photoluminescence spectrum at room temperature. It is attributed to the crystallinity of AlQ[sub 3] and the coupling of vibrations of the individual ligands to the fluorescence transition. The emission current was also observed with a turn-on field of 12.0 V/μm, and a current density of about 0.8 mA/cm[sup 2] at 22 V/μm. Therefore, the AlQ[sub 3] crystalline film provides a choice for field emission. © 2003 American Institute of Physics.


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