Optically Patternable Polymer Light-Emitting Device

Publisher Website
Google Scholar
Abstract
Optically patternable polymer light-emitting devices with an indium-tin-oxide/poly(2-methoxy-5-dodecyloxy-p-phenylene vinylene)/semitransparent-Al structure are fabricated and characterized. When the optical transmittance of the Al electrode is about 30% at a 500 nm wavelength, the emission from the device is rapidly reduced by photoirradiation in air, and the emission is completely suppressed after irradiation for 5 min. Considerable bleaching of the optical absorption of the polymer film of the devices due to photoirradiation is also observed. These effects originate from photooxidation of the polymer by the atmospheric oxygen passing through the semitransparent-Al electrode. It is also shown that these effects are considerably moderated by using a thicker Al electrode, indicating the importance of the Al electrode thickness on the patternability of the emission.