The electroluminescent characteristics of white organic light-emitting diodes (WOLEDs) were investigated including single emitting layer (SEL) with an ADN host and dopants; BCzVBi, C545T, and DCJTB for blue, green and red emission, respectively. The structure of the high efficiency WOLED device was; ITO/NPB(700Å)/ADN: BCzVBi-7%:C545T-0.05%:DCJTB-0.1%(300Å)/Bphen(300Å)/Liq(20Å)/Al(1200Å) for mixing three primary colors. Luminous efficiency was 9.08cd/A at 3.5V and Commission Intenationale de L’eclairage (CIE x,y ) coordinates of white emission was measured as (0.320, 0.338) at 8V while simulated CIE x,y coordinates were (0.336, 0.324) via estimation from each dopant's PL spectrum.