Screening structure-property correlations and device performance of Ir(III) complexes in multi-layer PhOLEDs

Nan Tian; Daniel Lenkeit; Simon Pelz; Dimitrios Kourkoulos; Dirk Hertel; Klaus Meerholz; Elisabeth Holder

doi:10.1039/c1dt11059d

Screening structure-property correlations and device performance of Ir(III) complexes in multi-layer PhOLEDs

Dalton Trans. 2011 Nov 21;40(43):11629-35. doi: 10.1039/c1dt11059d. Epub 2011 Sep 30.

Authors

Nan Tian¹, Daniel Lenkeit, Simon Pelz, Dimitrios Kourkoulos, Dirk Hertel, Klaus Meerholz, Elisabeth Holder

Affiliation

¹ Functional Polymers Group and Institute of Polymer Technology, University of Wuppertal, Gaussstr. 20, D-42097 Wuppertal, Germany.

PMID: 21960010
DOI: 10.1039/c1dt11059d

Abstract

The structure-property correlations of a set of heteroleptic red- and green-emitting Ir(III) complexes with different temperature sensitivities and charge trapping capabilities are described, revealing superb performance in multi-layer phosphorescent organic light-emitting diodes (PhOLEDs) expressed by very high maximum luminous efficiencies up to 36.8 cd A(-1). Using 2-phenylpyridine and with 2-(naphthalen-1-yl)pyridine as the C^N ligand, the resulting red emitting complex featured a maximum luminous efficiency of 10.8 cd A(-1); one of the most excellent device performances within this class of red Ir(III) emitters.