Disclosed are iridium-based luminescent compounds having phenylpyridine moieties with an organosilicon group, and organic electroluminescence devices using the compounds as color-producing materials. The luminescent compounds have the structure of Formula 1 below: ##STR00001## wherein L.sub.1, L.sub.2, L.sub.3, R.sub.1, R.sub.2 and R.sub.3, which may be identical to or different from each other, are each independently selected from the group consisting of aryl, alkoxy, alkyl, and groups of Formula 3 below: ##STR00002##