Prof. Dr. Hartmut Yersin
University of Regensburg

Prof. Harry B. Gray
California Institute of Technology, Pasadena (CALTECH)
Division of Chemistry and Chemical Engineering

The research groups of Prof. Dr. Hartmut Yersin and Prof. Dr. Harry B. Gray will focus on new platinum and iridium dimers. These compounds represent members of a new class of materials. They are promising candidates for applications as emitters in OLEDs or as optical sensors. The photophysical properties of this outstanding class of compounds will be investigated to develop a deeper knowledge about the electronic structures and the molecular characteristics and processes. This approach will push the design and optimization of further compounds with improved properties with respect to the different applications mentioned above.

Final report:

The aim of the granted project was to develop new photonic materials. A new d⁸-d⁸ diplatinate complex was designed and characterized in deep detail. In particular, the resulting compound [Pt₂(pop BF₂)₄]^4– exhibits an intense dual emission, consisting of a fluorescence and phosphorescence, at a total photoluminescence quantum yield of ≈ 100 %, even at ambient temperature. The very rare phenomenon of a dual emission opens important and novel applications in OLED and sensing technologies, for example, color tunable lighting devices and color changing probes for oxygen and temperature sensing, respectively. Results of our research were filed as patents.

• H. B. Gray, T. Hofbeck, Y. C. Lam, J. R. Winkler, H. Yersin
Platin-Dimer-Komplex für die optische Sensorik von Sauerstoff und Temperatur,
DE 10 2014 111 050.1

• H. B. Gray, T. Hofbeck, Y. C. Lam, J. R. Winkler, H. Yersin
Platinum Dimer Complex For Optical Sensing of Oxygen And Temperature,
EP13179290.5