Linked Life Data

18666280

Source:http://linkedlifedata.com/resource/pubmed/id/18666280

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2008-11-4
pubmed:abstractText
We report a significant decrease in turn-on times of light-emitting electrochemical cells (LECs) by tethering imidazolium moieties onto a cationic Ir complex. The introduction of two imidazolium groups at the ends of the two alkyl side chains of [Ir(ppy)(2)(dC6-daf)](+)(PF(6))(-) (ppy = 2-phenylpyridine, dC6-daf = 9,9'-dihexyl-4,5-diazafluorene) gave the complex [Ir(ppy)(2)(dC6MIM-daf)](3+)[(PF(6))(-)](3) (dC6MIM-daf = 9,9-bis[6-(3-methylimidazolium)hexyl]-1-yl-4,5-diazafluorene). Both complexes exhibited similar photoluminescent/electrochemical properties and comparable electroluminescent efficiencies. The turn-on times of the LECs based on the latter complex, however, were much lower than those of devices based on the former. The improvement is ascribed to increased concentrations of mobile counterions ((PF(6))(-)) in the neat films and a consequent increase in neat-film ionic conductivity. These results demonstrate that the technique is useful for molecular modifications of ionic transition-metal complexes (ITMCs) to improve the turn-on times of LECs and to realize single-component ITMC LECs compatible with simple driving schemes.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
Nov
pubmed:issn
1861-471X
pubmed:author
pubmed:issnType
Electronic
pubmed:day
13
pubmed:volume
3
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1922-8
pubmed:year
2008
pubmed:articleTitle
Decreased turn-on times of single-component light-emitting electrochemical cells by tethering an ionic iridium complex with imidazolium moieties.
pubmed:affiliation
Department of Electrical Engineering, Graduate Institute of Electro-optical Engineering, National Taiwan University, Taipei 106, Taiwan.
pubmed:publicationType
Journal Article