Phosphorescence of aluminum tris(quinoline-8-olate)

Cölle, M.; Gärditz, C.
April 2004
Applied Physics Letters;4/19/2004, Vol. 84 Issue 16, p3160
Academic Journal
Phosphorescence from an aluminum tris(quinoline-8-olate) (Alq3)-based organic light-emitting diode was observed by measuring the delayed electroluminescence at low temperatures. The spectra as well as the transient intensities were investigated. Vibronic progressions of the phosphorescence (T1→S0 transition) were resolved and the triplet energy of Alq3 was measured to be 2.05±0.1 eV. The lifetimes of the triplet state were determined from the delayed fluorescence as well as from the phosphorescence decay to be 8.1±0.5, 7.0±0.5, and 5.6±0.5 ms at 30, 50, and 80 K, respectively. © 2004 American Institute of Physics.


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