Please select the desired project time frame:

• July 2026
• January 2026
• July 2025
• January 2025
• July 2024
• January 2024
• July 2023
• January 2023
• July 2022
• January 2022
• July 2021
• January 2021
• July 2020
• January 2020
• July 2019
• January 2019
• July 2018
• January 2018
• July 2017
• January 2017
• July 2016
• January 2016
• July 2015
• January 2015
• July 2014
• January 2014
• July 2013
• January 2013
• July 2012
• January 2012
• July 2011
• January 2011
• July 2010
• January 2010
• July 2009
• January 2009
• July 2008
• January 2008
• July 2007
• January 2007
• July 2006
• January 2006
• July 2005
• January 2005
• July 2004
• January 2004
• July 2003
• January 2003
• July 2002
• January 2002
• July 2001
• January 2001

Start of funding 01.01.2005

New Triplet Emitter Materials for Organic Light Emitting Diodes (OLEDs)

---

Prof. Dr. Hartmut Yersin’s group (University of Regensburg, Germany) and Prof. Dr. Mark E. Thompson’s group (University of Southern California, Los Angeles, USA) established a cooperation on OLED material characterization as a basis for further material development. The OLED technology has a great potential to be applied in television screens, large area displays, flexible and/or transparent displays, large area light sources, etc.. For OLEDs, the emitter materials play a crucial role. In particular, organometallic triplet emitter complexes provide electro-phosphorescence with high brightness and power efficiency. The cooperation aims to deepen the understanding of photophysical properties of triplet emitters and their interactions with matrix materials. The obtained knowledge is aimed to be utilized for developing new materials which meet the requirements for being applied in OLED devices.

Final report:
In the scope of this project, new materials for OLEDs were synthesized and photophysically characterized. These compounds represent triplet emitters which can be applied for highly efficient OLEDs. The joint investigations resulted in seven publications in highly ranked international journals.

Rausch A. F., Thompson M. E., Yersin H.
Blue Light Emitting Ir(III) Compounds for OLEDs - New Insights into Ancillary Ligand Effects on the Emitting Triplet State
J. Phys. Chem. A, 113, 5927 (2009)

Rausch A. F., Thompson M. E., and Yersin H.
Matrix Effects on the Triplet State of the OLED Emitter Ir(4,6-dFppy)(pic) (FIrpic): Investigations by High-Resolution Optical Spectroscopy
Inorg. Chem., 48, 1928 (2009)

Rausch A. F., Thompson, M. E., Yersin, H.
Triplet state relaxation processes of the OLED emitter Pt(4,6-dFppy)(acac)
Chem. Phys. Lett., 468, 46 (2009)

Bauer R., Finkenzeller W. J., Bogner U., Thompson M. E., Yersin H.
Matrix influence on the OLED emitter Ir(btp)2(acac) in polymeric host materials - Studies by persistent spectral hole burning
Organic Electronics, 9(5), 641 (2008)

Rausch A. F., Homeier H. H. H., Djurovich P. I., Thompson M. E., Yersin H.
Spin-orbit coupling routes and OLED performance - Studies of blue light emitting Ir(III) and Pt(II) complexes in:
Organic Light Emitting Materials and Devices XI, eds. Z. H. Kafafi, F.So, Proceedings of SPIE, 6655, 66550F (2007)

Finkenzeller W. J., Thompson M. E., and Yersin H.
Phosphorescence dynamics and spin-lattice relaxation of the OLED emitter Ir(btp)2(acac)
Chem. Phys. Lett., 444, 273 (2007)

Finkenzeller W. J., Hofbeck T., Thompson M. E., and Yersin H.
Triplet state properties of the OLED emitter Ir(btp)2(acac) - Characterization by site-selective spectroscopy and application of high magnetic fields
Inorg. Chem., 46, 5076 (2007)