Bright, saturated, red-to-yellow organic light-emitting devices based on polarization-induced spectral shifts

Publication Type:

Journal Article

Source:

Chem. Phys. Lett., Volume 287, Issue 3–4, p.455-460 (1998)

ISBN:

0009-2614

Keywords:

1998, 2013 and earlier

Abstract:

We demonstrate red, orange, and yellow organic light-emitting devices (OLED) with the electroluminescent layer consisting of aluminum
tris(8-hydroxyquinoline) (Alq3) 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/m2 and 15200 cd/m2 is measured, with a luminance of 100 cd/m2 attained
at 100 mA/cm2 (14 V) and 10 mA/cm2 (12 V), respectively. The current
versus voltage dependencies of these devices are consistent with
trap-limited conduction, unaffected by the presence of DCM2.