A new white emitting OLED (WOLED) using selective doping in a single host is proposed. The device had the structure of ITO/2-TNATA/NPB/GDI-602/GDI602: rubrene/Alq(3)/LiF/Al, in which the GDI602/GDI602: rubrene emission layer was prepared by the selective doping of rubrene into the single GDI-602 host material. The blue and yellow emitting regions consisted of GDI-602 that was undoped and doped with rubrene (10% of the host material in the evaporation rate), respectively. The luminance and efficiency of the fabricated device were 1050 cd/m(2) and 0.6 lm/W at the driving voltage of 9V, respectively. It showed two peak wavelength emissions of 460nm and 560nm in the electroluminescent spectra. The color coordinate in the CIE chart was (0.33, 0.33) which proved to be pure white emission.