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Kwon, Tae-Hyuk
Energy Recognition
Research Interests
  • Energy transfer, organic solar cells, supercapacitor, ultrasonic spray chemistry, dithienothiophene, iridium complexes, phosphorescent bioapplications


New Approach Toward Fast Response Light-Emitting Electrochemical Cells Based on Neutral Iridium Complexes via Cation Transport

DC Field Value Language Kwon, Tae-Hyuk ko Oh, Yong Ho ko Shin, Ik-Soo ko Hong, Jong-In ko 2014-11-14T00:09:52Z - 2014-11-13 ko 2009-03 ko
dc.identifier.citation ADVANCED FUNCTIONAL MATERIALS, v.19, no.5, pp.711 - 717 ko
dc.identifier.issn 1616-301X ko
dc.identifier.uri -
dc.description.abstract Here, a new method is presented to increase the turn-on time and stability of light-emitting electrochemical cells (LECs). To this end, a neutral iridium complex (5) containing a pendant Na(+) ion that is generally known to have a faster mobility In the solid film than bulky anions is introduced, instead of the classic Ionic transition metal complex (iTMC) with counter anion (7). Synthesis, photophysical and electrochemical studies of these complexes are reported. In the device configuration of ITO/5 or 7+PEO (polyethylene oxide) (100-110 nm)/Au, as the voltage increases, complex 5 emits red light at -3.6 V while complex 7 appears at -S.6 V, although their electrochemical and photophysical gap are similar. Furthermore, at constant voltage, -3V, the turn-on time of complex 5 was less than 0.5 min, which is a 60-fold faster turn-on time compared to the iTMC (7) with PF(6). These results are presumably due to the faster delivery of the Na(+) ions to the electrode compared to PF(6) ions. Also, the device lifetime of complex 5 exhibits a six-fold increase in stability and a three-fold shorter time to reach maximum brightness at constant bias compared to the device made with complex 7. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher WILEY-V C H VERLAG GMBH ko
dc.title New Approach Toward Fast Response Light-Emitting Electrochemical Cells Based on Neutral Iridium Complexes via Cation Transport ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-62149114913 ko
dc.identifier.wosid 000264502000005 ko
dc.type.rims ART ko
dc.description.wostc 43 *
dc.description.scopustc 41 * 2015-05-06 * 2014-11-13 *
dc.identifier.doi 10.1002/adfm.200801231 ko
dc.identifier.url ko
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