Abstract
RGB pixel generation by microcavity top-emitting organic light-emitting diodes (TOLEDs) is beneficial to both the reduction of the light loss and the improving the color purity and efficiency. Based on the multi-emitting layers, white organic light-emitting diodes (OLEDs) and microcavity TOLEDs were prepared. TOLEDs were made using Ag/ITO as the reflector and adjusting layer, Al/Ag as the semi-transparent cathode, and Alq：DCJTB/TBADN：TBPe/Alq：C545 as white light emitting layer. By adjusting the thickness of ITO, optical length of cavity the colour of the device can be changed, so the RGB tricolor devices are obtained. The peak wavelengths are 476，539 and 601nm, the commission Internationale d'Eclairage (CIE) coordinates are (0.133，0.201)，(0.335，0.567) and (0.513，0.360), and the FWHM are 32，50 and 73nm for Blue, Green and Red，respectively.
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