Evaluation of RGB OLED stacks on CMOS microdisplay substrates

Highly efficient, low-voltage organic light emitting diodes (OLEDs) are well suitable for the integration into a CMOS-process. Different RGB-OLED-stacks with doped charge transport layers were prepared on different two metal layer CMOS test substrates without active transistor area. Afterwards, the different test displays were measured and compared with respect to their performance (current, luminance, voltage, luminance dependence on viewing angle, optical outcoupling etc.).