The present invention relates to an organic electroluminescence device in particular referring to an organic electroluminescence device generable three wavelength white light source. It contains on a substrate according to sequence set with a first electrode, plurality of luminescent layer and a second electrode, wherein luminescent layer at least including a first and a second luminescent layer, said first luminescent layer generable tertiary color light, second luminescent layer including first guest illuminator and second guest illuminator, first and second guest illuminator all having same chemical major structure but each having different substituent which makes first guest illuminator generable a first color light and second guest illuminator then generating a second color light said first color light, second color light and third color light forming white light source having three wavelength, by which to raise light source effective availability and depth of colour saturation. |