An efficient and stable white organic light-emitting device(OLED) with dual emission layer consisting of cohost system is demonstrated.The blue-emitting layer is composed of fluorescent dye DSA-Ph doped into single host TBADN (TBADN:3 wt% DSA-Ph) while the red-emitting layer is fluorescent dye DCJTB doped into cohost system consisting of TBADN and Alq3([TBADN:Alq3]:1 wt% DCJTB).The device luminous efficiency and CIE color coordinates could be adjusted by altering the ratio of TBADN to Alq3 in the red-emitti...