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Proceedings Paper

Novel oligonuclear copper complexes featuring exciting luminescent characteristics
Author(s): Daniel M. Zink; Daniel Volz; Larissa Bergmann; Martin Nieger; Stefan Bräse; Hartmut Yersin; Thomas Baumann
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Paper Abstract

A series of highly luminescent mono-, di-, and trinuclear copper(I) complexes has been synthesized using modular ligand systems of easily accessible N^N, P^P or P^N ligands in order to show the rich structural diversity of copper(I) compounds. Those systems allow for the design of various emitting materials with desired photophysical properties, such as emission colors and high efficiencies. The complexes were characterized with well-established methods such as X-ray crystallographic studies or elemental analysis and, in addition, due to their interesting photoluminescence characteristics, their emission properties were further investigated by means of spectroscopic methods as well as DFT-calculations. In detail, various cationic and neutral mononuclear complexes have been synthesized in order to investigate the photophysical properties of this these different types of emitting compounds. It has been found that neutral copper(I) complexes show superior emission properties (with PLQY up to 89%) compared to their cationic counterparts. Furthermore, a series of dinuclear and trinuclear copper(I) complexes has been synthesized featuring an easy tunable emission maximum from sky blue to deep red (481 nm to 713 nm) with extraordinary high photoluminescence quantum yields up to 99%. In addition, a new crosslinking-technique has been developed to open up the door for a new way to fully solution processed OLED using these promising emitting compounds: Alkyne-substituted emitting complexes crosslink automatically with azide-polymers in a copper-catalyzed alkyne-azide Click reaction.

Paper Details

Date Published: 27 September 2013
PDF: 17 pages
Proc. SPIE 8829, Organic Light Emitting Materials and Devices XVII, 882907 (27 September 2013); doi: 10.1117/12.2028619
Show Author Affiliations
Daniel M. Zink, cynora GmbH (Germany)
Daniel Volz, cynora GmbH (Germany)
Karlsruhe Institute of Technology (Germany)
Larissa Bergmann, cynora GmbH (Germany)
Karlsruhe Institute of Technology (Germany)
Martin Nieger, Univ. of Helsinki (Finland)
Stefan Bräse, Karlsruhe Institute of Technology (Germany)
Hartmut Yersin, Univ. Regensburg (Germany)
Thomas Baumann, cynora GmbH (Germany)

Published in SPIE Proceedings Vol. 8829:
Organic Light Emitting Materials and Devices XVII
Franky So; Chihaya Adachi, Editor(s)

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