Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9812206 | Thin Solid Films | 2005 | 6 Pages |
Abstract
Narrow bandwidth red electroluminescence from OLED devices fabricated using a simple solution-based approach is demonstrated. A spin-casting method is employed to fabricate organic light emitting diode (OLED) devices comprising a poly(N-vinylcarbazole) (PVK) host matrix doped with a europium β-diketonate complex, Eu(dbm)3(Phen) (dibenzoylmethanate, dbm; 1,10-phenanthroline, Phen) on glass/indium tin oxide (ITO)/3,4-polyethylene-dioxythiophene-polystyrene sulfonate (PEDOT) substrates. Saturated red europium ion emission, based on the 5D0 â 7F2 transition, is centered at a wavelength of 612 nm with a full width at half maximum of 3.5 nm. A maximum external quantum efficiency of 6.3 Ã 10â 2 cd/A (3.1 Ã 10â 2%) and a maximum luminance of 130 cd/m2 at 400 mA/cm2 and 25 V is measured for ITO/PEDOT/PVK:Eu(dbm)3(Phen)/Ca/Al devices. This measured output luminance is comparable to that of devices fabricated using more sophisticated small molecule evaporation techniques.
Related Topics
Physical Sciences and Engineering
Materials Science
Nanotechnology
Authors
Alan O'Riordan, Eamon O'Connor, Shane Moynihan, Xavier Llinares, Rik Van Deun, Pascal Fias, Peter Nockemann, Koen Binnemans, Gareth Redmond,