A white or whitish luminescent material for phosphorescence is provided by
synthesizing an organometallic complex that is able to convert a triplet
excited state into light emission. In particular, a white
electroluminescent device that has a high luminous efficiency and can be
manufactured easily is provided by using the organometallic complex to
manufacture a white or whitish electroluminescent device. The
electroluminescent device is used to provide a light-emitting device with
low power consumption. A fluorescent and phosphorescent material
represented by a general formula (2) is synthesized. Since this material
can emit both components of fluorescence and phosphorescence in the
region of visible light, white or whitish luminescence can be achieved,
which is applied to an electroluminescent device or a light-emitting
device ##STR00001##