Journal article

Triplet energy back transfer in conjugated polymers with pendant phosphorescent iridium complexes

Nicholas R Evans, Lekshmi Sudha Devi, Chris SK Mak, Scott E Watkins, Sofia I Pascu, Anna Koehler, Richard H Friend, Charlotte K Williams, Andrew B Holmes

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | AMER CHEMICAL SOC | Published : 2006

Abstract

The nature of Dexter triplet energy transfer between bonded systems of a red phosphorescent iridium complex 13 and a conjugated polymer, polyfluorene, has been investigated in electrophosphorescent organic light-emitting diodes. Red-emitting phosphorescent iridium complexes based on the [Ir(btp)(2)(acac)] fragment (where btp is 2-(2'-benzo[b]thienyl)pyridinato and acac is acetylacetonate) have been attached either directly (spacerless) or through a -(CH(2))(8)- chain (octamethylene-tethered) at the 9-position of a 9-octylfluorene host. The resulting dibromo-functionalized spacerless (8) or octamethylene-tethered (12) fluorene monomers were chain extended by Suzuki polycondensations using the..

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University of Melbourne Researchers