Linked Life Data

20146471

Source:http://linkedlifedata.com/resource/pubmed/id/20146471

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2010-3-3
pubmed:abstractText
Three Ir-based materials were synthesized through metathesis reaction between halide and alkali metal salts of two cationic and three anionic Ir complexes, respectively. The resulting "soft salt" complexes are composed of an organometallic cation and an organometallic anion. The electrochemical and photophysical characterization of these compounds is reported. The redox potentials of the soft salts are shown to be determined by the lowest energy potentials of the two ions. Energy transfer between the ions in solution is observed, and found to take place at diffusion controlled rates. Organic LEDs were prepared with each of the three soft salts, using the simple structure of anode/PVK/soft salt/BCP/cathode. The soft salts yielded maximal external quantum efficiencies (EQE) ranging from 0.2% to 4.7%. The study suggests that the internal energy alignment between two ions in the soft salts is responsible for the widely disparate results. To achieve a high EQE, it is critical to have the HOMO and LUMO values of one of the ions fall between those of the other ion, that is, one ion has both the lowest oxidation potential and the least negative reduction potential.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1520-5126
pubmed:author
pubmed:issnType
Electronic
pubmed:day
10
pubmed:volume
132
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3133-9
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Study of ion-paired iridium complexes (soft salts) and their application in organic light emitting diodes.
pubmed:affiliation
Department of Chemical Engineering and Materials Science, University of Southern California, Los Angeles, California 90089, USA.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't