Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5404189 | Journal of Luminescence | 2006 | 5 Pages |
Abstract
Photoluminescence (PL) of phosphorescent molecules fac tris (2-phenylpyridine) iridium (Ir(ppy)3) and platinum octaethyl porphine (PtOEP) has been studied using films of Ir(ppy)3 doped in CBP and PtOEP doped in TPD, respectively. A weak emission band is observed at 396Â nm in Ir(ppy)3. Its intensity increases with decreasing temperature from 300Â K. This emission is attributed to the singlet emission from 1MLCT state. The singlet emission band of PtOEP is observed at 542Â nm, which appears below 150Â K. The intersystem crossing conversion is estimated to be 98.7% for Ir(ppy)3. From the excitation spectra for Ir(ppy)3 emission, we suggest energy transfer from the n=1 vibrational state of Ir(ppy)3 to the n=0 state of CBP host.
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Physical Sciences and Engineering
Chemistry
Physical and Theoretical Chemistry
Authors
Taiju Tsuboi,