Doping dynamics in light-emitting electrochemical cells
2011 (English)In: Organic electronics, ISSN 1566-1199, Vol. 12, no 10, 1746-1753 p.Article in journal (Refereed) Published
A major drawback of light-emitting electrochemical cells (LECs) is the long time scale associated with switching, during which ions redistribute in the active layer. We present a numerical modeling study that gives fundamental insight in the dynamics during turn-on. The characteristic response of LECs to an applied bias is the electrochemical doping of the active layer by doping fronts moving across the active layer. Formation and motion of such doping fronts are shown to be intimately related to both the electronic and ionic mobility and therefore provide useful information regarding these two quantities in LECs. In particular, it is shown that the switch-on time in LECs is directly related to the time an ion needs to cross approximately half the device, enabling the extraction of the ion mobility from the switch-on time.
Place, publisher, year, edition, pages
Elsevier , 2011. Vol. 12, no 10, 1746-1753 p.
Light-emitting electrochemical cell; Electrochemical doping; Turn-on time; Conjugated polymer
IdentifiersURN: urn:nbn:se:liu:diva-118154DOI: 10.1016/j.orgel.2011.07.005ISI: 000293591500023OAI: oai:DiVA.org:liu-118154DiVA: diva2:813704
Funding Agencies|Dutch ministry of economic affairs2015-05-252015-05-222015-06-02