By using Zn(BTZ)2, an efficient material to transport electrons, as blue emitting layer, a white organic light-emitting device with the structure of indium tin oxide (ITO)/N,N′-diphenyl-N, N′-bis(3-methylphenyl)-1,1-biphenyl-4,4′-diamine) (TPD): N,N′-bis-(1-naphenyl)-N,N′-biphenyl -1,1′-biphenyl-4-4′-diamine (NPB)(1:5%)(30nm) /NPB(10nm)/ bis［2-(2-hydroxyphenyl) benzothiazolate］zinc (Zn(BTZ)2)(30nm)/ bis(2-methyl-8-quinolinolato)(para-phenylphenolato)aluminum (BAlq)∶ 5,6,11,12-tetraphenyl-naphthacene (rubrene) (30nm)/tris(8-hydroxyquinoline)(Alq)(15nm)/Mg∶Ag has been successively made after trying several kinds of hole transporting layers and different thicknesses of emitting layers. The device can efficiently control the injecting and distributes of carriers (electrons and holes). When the voltages changes from 8 to 13V, the Commission Internationale de l′Eclairage coordinates change from (0.32，0.40) to (0.30，0.38) within the white-light region. The maximum external efficiency of this device is 0.85%, and when the driving voltage is 15V, it shows the maximum brightness of 11240cd/m2. By chosing proper hole transporting layers and the best thicknesses of emitting layers, the device achieves a balance between the hole and electron injection, which is presumed to be responsible for the improved performances of the device.