Phosphorescent full color 2.2 inch quarter common intermediate format (QCIF) active matrix organic light emitting diodes (AMOLED) have been developed for mobile phone application. Red and green phosphorescent emitters have been adopted as light emitting components and the efficiency of the AMOLED as measured was enhanced up to 10.9 cd/A at a white brightness of 100 cd/m(2). The power consumption of the AMOLED was reduced below 200 mW due to high efficiency and low driving voltage. (C) 2003 Elsevier B.V. All rights reserved.