Magnetic field effects on electroluminescence emanated simultaneously from blue fluorescent and red phosphorescent emissive layers of an organic light-emitting diode

► The white OLED consisting of the blue fluorescent and red phosphorescent materials was fabricated. ► The MELs on the fluorescent and phosphorescent emission was simultaneously studied. ► The MELs on the fluorescence tended to saturation at high magnetic field. ► The MELs on the phosphorescence monotonically increased at high magnetic field. ► Magnetic-field modulated e-h pair conversion and TTA processes were proposed.