The design and realization of flexible light-emitting electrochemical cells with record-long lifetime
2009 (English)In: Advanced Functional Materials, ISSN 1616-301X, E-ISSN 1616-3028, Vol. 19, no 16, 2671-2676 p.Article in journal (Refereed) Published
Polymer light-emitting electrochemical cells (LECs) offer an attractive opportunity for low-cost production of functional devices in flexible and large-area configurations, but the critical drawback in comparison to competing light-emission technologies is a limited operational lifetime. Here, it is demonstrated that it is possible to improve the lifetime by straightforward and motivated means from a typical value of a few hours to more than one month of uninterrupted operation at significant brightness (>100 cd m−2) and relatively high power conversion efficiency (2 lm W−1 for orange-red emission). Specifically, by optimizing the composition of the active material and by employing an appropriate operational protocol, a desired doping structure is designed and detrimental chemical and electrochemical side reactions are identified and minimized. Moreover, the first functional flexible LEC with a similar promising device performance is demonstrated.
Place, publisher, year, edition, pages
Wiley , 2009. Vol. 19, no 16, 2671-2676 p.
flexible materials, light-emitting electrochemical cells, organic electronics, power conversion efficiencies
IdentifiersURN: urn:nbn:se:umu:diva-30612DOI: 10.1002/adfm.200900479OAI: oai:DiVA.org:umu-30612DiVA: diva2:284917