A Solution-Processed Trilayer Electrochemical Device: Localizing the Light Emission for Optimized Performance
2012 (English)In: Journal of the American Chemical Society, ISSN 0002-7863, E-ISSN 1520-5126, Vol. 134, no 34, 14050-14055 p.Article in journal (Refereed) Published
We present a solution-processed trilayer light-emitting device architecture, comprising two hydrophobic and mobile-ion-containing "transport layers" sandwiching a hydrophilic and ion-free "intermediate layer", which allows for lowered self-absorption, minimized electrode quenching, and tunable light emission. Our results reveal that the transport layers can be doped in situ when a voltage is applied, that the intermediate layer as desired can contribute significantly to the light emission, and that the key to a successful operation is the employment of a porous and (similar to 5-10 nm) thin intermediate layer allowing for facile ion transport. We report that such a solution-processed device, comprising a thick trilayer material (similar to 250 nm) and air-stable electrodes, emits blue light (lambda(peak) = 450, 484 nm) with high efficiency (5.3 cd/A) at a low drive voltage of 5 V.
Place, publisher, year, edition, pages
2012. Vol. 134, no 34, 14050-14055 p.
IdentifiersURN: urn:nbn:se:umu:diva-61213DOI: 10.1021/ja3041916ISI: 000308043400027OAI: oai:DiVA.org:umu-61213DiVA: diva2:565668