Abstract
We demonstrate red, orange, and yellow organic light-emitting devices (OLED) with the electroluminescent layer consisting of aluminum tris(8-hydroxyquinoline) (Alq 3) doped with laser dye DCM2, with the emission color dependent on the concentration of DCM2. A peak emission wavelength shift of up to 50 nm is found to be due to strong polarization effects. For red and yellow–orange OLEDs, a maximum luminance of 1400 cd/m 2 and 15200 cd/m 2 is measured, with a luminance of 100 cd/m 2 attained at 100 mA/cm 2 (14 V) and 10 mA/cm 2 (12 V), respectively. The current versus voltage dependencies of these devices are consistent with trap-limited conduction, unaffected by the presence of DCM2.
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