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dc.contributor.authorHu, Shiyu
dc.contributor.authorGao, Jun
dc.date.accessioned2020-06-01T15:19:10Z
dc.date.available2020-06-01T15:19:10Z
dc.date.issued2018
dc.identifier.citationHu, S., & Gao, J. (2018). Stress Testing Polymer Light-Emitting Electrochemical Cells: Suppression of Voltage Drift and Black Spot Formation. Advanced Materials Technologies, 3(11), 1800229. doi:10.1002/admt.201800229en
dc.identifier.urihttp://hdl.handle.net/1974/27872
dc.description.abstractThe stress characteristics of the polymer light-emitting electrochemical cells (PLECs) are comprehensively evaluated by varying a host of material and operational parameters. PLECs with the lowest salt concentration of less than 2.5% exhibit runaway voltage drift that leads to rapid cell destruction. PLECs with the lowest electrolyte polymer concentration and a 5% salt content exhibit the longest luminance half-life, but are slow to activate and are plagued by black spots. At moderate-to-high electrolyte concentrations, the PLECs are relatively stable but are not immune to black spots and voltage drift. A lifetime figure-of-merit is introduced to quantitatively account for all three indicators of cell degradation in luminance decay, voltage drift, and black spot formation. A surprising discovery is that voltage drift and black spot formation can be effectively suppressed by drastically increasing the electrolyte content. A cell with a 70% electrolyte content exhibits the best lifetime of nearly 350 h when operated at a constant current density of 167 mA cm−2. The black spots can also be effectively eliminated by employing silver instead of aluminum as the cathode material.en
dc.description.sponsorshipNatural Sciences and Engineering Research Council of Canada: RGPIN-2015-05344en
dc.publisherWileyen
dc.rightsThis is the peer reviewed version of the following article: Hu, S., & Gao, J. (2018). Stress Testing Polymer Light-Emitting Electrochemical Cells: Suppression of Voltage Drift and Black Spot Formation. Advanced Materials Technologies, 3(11), 1800229. doi:10.1002/admt.201800229, which has been published in final form at http://dx.doi.org/10.1002/admt.201800229. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.en
dc.subjectblack spotsen
dc.subjectdegradationen
dc.subjectlifetimeen
dc.subjectlight-emitting electrochemical cellsen
dc.subjectpolymer light-emitting electrochemical cellen
dc.titleStress Testing Polymer Light-Emitting Electrochemical Cells: Suppression of Voltage Drift and Black Spot Formationen
dc.typejournal articleen
dc.identifier.doihttps://dx.doi.org/10.1002/admt.201800229


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