Dresden 2006 – wissenschaftliches Programm
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HL: Halbleiterphysik
HL 31: Organic semiconductors
HL 31.14: Vortrag
Mittwoch, 29. März 2006, 18:00–18:15, POT 51
Modified quinolates for pH-probes and high performance light emitting devices — •Stephan Rentenberger1, Stefan Kappaun2, Alexander Pogantsch1, Franz Stelzer2, Egbert Zojer1, and Christian Slugovc2 — 1Institute of Solid State Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria — 2Institute for Chemistry and Technology of Organic Materials, Graz University of Technology, Stremayrgasse 16, 8010 Graz, Austria
Aluminum quinolates (AlQ3) were first reported by Tang and VanSlyke in 1987 to possess electroluminescent properties and are currently widely used as light emitting electron transport materials for organic light emitting devices (OLEDs). As recent studies revealed, boron compounds are in general more stable than the corresponding aluminum compounds. While ligand precursors of those complexes exhibit characteristic features that can be used for pH-sensing purposes, the corresponding boron complexes display impressive properties as emitting layers in OLEDs. In our presentation we demonstrate both, the influence of protonation on the emission characteristics of the ligand precursors, and the application of the corresponding boron complexes in highly stable OLEDs. Additionally color-tuning by controlling the extension of the pi-conjugated system is achieved.