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Materials Science at Oregon State University

Photophysics of organic materials: from thin-film devices to single molecules

Date: Thursday, Feb 2nd
Presenter: Prof. Oksana Ostroverkhova, OSU Physics

Abstract


Organic (opto)electronic materials have been explored in a variety of applications in electronics and photonics. They offer several advantages over traditional silicon technology, including low-cost processing, fabrication of large-area flexible devices, and widely tunable properties through functionalization of the molecules. Over the past decade, remarkable progress in the material design has been made, which led to a considerable boost in performance of organic thin-film transistors, solar cells, and other applications that rely on (photo)conductive properties of the material. Nevertheless, the nature of photoexcitations, charge carrier photogeneration, and transport in organic semiconductors is not completely understood. In this presentation, I will summarize our efforts towards understanding photoinduced charge carrier dynamics in high-performance organic materials and towards development of novel, sustainable organic materials.

Bio:
Oksana Ostroverkhova received her Diploma with Honors in Physics and Optical Engineering from Kiev Taras Shevchenko National University (Kiev, Ukraine) in 1996. During her graduate studies at Case Western Reserve University (Cleveland, USA) in the group of Prof. K. D. Singer, she specialized in the photoconductive and nonlinear optical properties of polymers and liquid crystals and obtained her PhD in Physics in 2001. Her postdoctoral work at Stanford University (Stanford, USA) in the group of Prof. W.E. Moerner (Nobel Prize in Chemistry 2014) involved physics and applications of photorefractive organic materials; there she also began her quest into single molecule fluorescence spectroscopy of organic optoelectronic materials. The Killam Memorial Fellowship award enabled Dr. Ostroverkhova’s work on ultrafast THz spectroscopy of organic semiconductors in the group of Prof. F.A. Hegmann at the University of Alberta (Edmonton, Canada). In 2005, Dr. Ostroverkhova joined Physics Department at Oregon State University (Corvallis, USA), where she is currently an Associate Professor. She is a recipient of several awards including the NSF CAREER award, OSU Carter Award for Outstanding and Inspirational Teaching, and OSU Milton Harris Award in Basic Research. Her current research interests are in the optoelectronic properties of organic materials spanning various time and spatial scales, in the development of sustainable (opto)electronic materials, and in utilizing optical properties of materials in entomology.