Thursday, October 10, 2019 noon to 1 p.m.

Bernard Kippelen
Center for Organic Photonics and Electronics, School of Electrical and Computer Engineering, Georgia Institute of Technology

Abstract:
We live in a world in flux where technology is changing at a pace that is unprecedented in human history.
In the next decade, “deep tech" will continue to play a major role in pushing further the technological
frontiers. Deep-tech innovations lie at the crossroads of massive shifts in demand led by megatrends such
as global climate change, demographic shifts, resource scarcity, and scientific progress such as the fusion
of the physical, digital, and biological domains. In that next wave of innovation, advances in new materials
and processing methods will continue to play a central role.
In this talk, we will discuss how printable organic conjugated semiconducting molecules and polymers
are creating new disruptive technologies that are impacting all industries. We will present recent advances
in various solid-state device platforms including, organic light-emitting diodes (OLEDs), organic
photodetectors (OPDs), organic photovoltaic devices (OPVs), and organic thin-film transistors (OTFTs).
We will emphasize the importance of interfaces in devices and show examples on how to engineer their
electrical properties. We will present a simple processing technique for the electrical doping of organic
semiconductors over a limited depth near the surface of the film that is based on immersing the film into a
polyoxometalate solution. Such approached can drastically reduce the fabrication cost of such devices,
simplify device architecture, and lead to all-organic devices fabricated by all-additive printing techniques.
As an illustration of the simplicity and versatility of this process we will discuss how high-performance
organic solar cells with simplified architecture can be implemented. Finally, we will present the results of
a detailed operational lifetime study of OTFTs showing that organic photonics and electronics can yield a
stability level superior to that of amorphous silicon.

Biography:

Bernard Kippelen is the Joseph M. Pettit Professor of Electrical and Computer Engineering at the Georgia Institute of Technology, Atlanta, GA, USA. His research interests range from the investigation of fundamental physical processes (nonlinear optical activity, charge transport, light harvesting and emission) in organic-based nanostructured thin films, to the design, fabrication and testing of light-weight flexible optoelectronic devices based on hybrid printable materials. He is a co-founder and co-President of the Institut Lafayette, an innovation platform located on Georgia Tech’s European campus Georgia Tech Lorraine (Metz, France). He was raised in Soultz, Alsace, France, and is a US and French citizen. He studied at the University Louis Pasteur in Strasbourg where he received a Maitrise in Solid-State Physics in 1985, and a Ph.D. in Nonlinear Optics in 1990. From 1990 to 1997 he was Chargé de Recherches at the French CNRS. In 1991, he joined the Optical Sciences Center at the University of Arizona as a postdoctoral fellow and joined the faculty in 1998 as an Assistant Professor. He was promoted to Associate Professor with tenure in 2001. He joined Georgia Tech in 2003 with the rank of Professor. He served as Director of the Center for Organic Photonics and Electronics on the Georgia Tech campus in Atlanta from 2011 to 2019. He holds 25 patents and has co-authored over 700 scientific communications, including over 275 peer-reviewed journal publications and 14 book chapters. His work has received over 25,000 citations and his h-index is 79 (Google Scholar). He served as chair and co-chair of numerous international conferences on organic optoelectronic materials and devices. He has graduated 22  Ph.D. students and advised 23 postdoctoral fellows. He is the recipient of an NSF-Career Award (2000), a 3M Corporation Young Faculty Award (2000), a FlexTech Alliance Award (2012), a Printed Electronics USA Award (2012), the Georgia Tech Class of 1934 Outstanding Interdisciplinary Activity Award (2014), and the Georgia Tech Steven A. Denning Faculty Award for Global Engagement (2019). His research was featured in numerous media outlets, including Forbes and Reuters. He was elected a Fellow of the Optical Society of America (2006), and a Fellow of SPIE (2007). He served as a Deputy Editor for Optics Express (2009-2012) and was the founding Editor of Energy Express (2010-2012).    

Location:

CREOL: CROL-103

Contact:

Dr. Michael Georgiopoulos michaelg@ucf.edu

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