Abstract: The green and blue top-emitting organic light-emitting devices with cavity effect have been fabricated.The Alq₃ and TBADN:3%DSAPh were used as emitting material of microcavity OLEDs.Silver was deposited as reflective anode and ITO was deposited as adjustive layer.Aluminum and silver thin films were made as semi-transparent cathode.The transmittance of aluminum and silver（Al/Ag） cathode was about 30%.By changing the thicknesses of ITO,different color was obtaind on Alq₃ devices and highly saturated color with Commission Internationale de L’Eclairage chromaticity coordinates（CIEx,y） of（0.141,0.049） was obtained on TBADN:3%DSAPh devices,full width at half maximym（FWHM） was only 17nm.In this article,the spectral intensity and FWHM of emission in cavity devices also have been studied.