Stability screening of phosphorescent iridium(III) complexes

INOR 300

Christoph Ulbricht, c.ulbricht@tue.nl1, Andreas Winter, a.winter@tue.nl2, and Ulrich S. Schubert, u.s.schubert@tue.nl1. (1) Laboratory of Macromolecular Chemistry and Nanoscience, Eindhoven University of Technology and Dutch Polymer Institute (DPI), P.O. Box 513, Eindhoven, 5600 MB, Netherlands, (2) Laboratory of Macromolecular Chemistry and Nanoscience, Eindhoven University of Technology and Dutch Polymer Institute, P.O. Box 513, Eindhoven, 5600 MB, Netherlands
Phosphorescent transition-metal complexes feature potential to improve the performance of organic light emitting devices (OLEDs) significantly, approaching internal quantum efficiencies up to 100%. Especially phosphorescent iridium(III) complexes, which exhibit the possibility to tune optical and electrical properties by varying the attached ligands, are interesting candidates to build up devices. Four main groups of iridium(III) complexes, acetoacetonates, homoleptic ones, picolinates as well as charged ones, are known to the literature. Their synthesis usually involves neutral to basic conditions. For the development of materials applicable in devices, the complexes involved need to be stable under the conditions of potential post-complexation modifications and device preparation. In this contribution, we describe a stability screening of commercially available as well as synthesized, charged and neutral Ir(III) complexes in relation to low pH values and high temperatures.

 

Synthesis and Characterization of Materials
7:00 PM-10:00 PM, Sunday, August 19, 2007 BCEC -- Exhibit Hall - B2, Poster

Division of Inorganic Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007