21 FebMaterial Science and Engineering Graduate SeminarTuning Structure and Ordering for Charge Transport in Frameworks of Organic Semiconductors
Tuning Structure and Ordering for Charge Transport in Frameworks of Organic Semiconductors
  • Dr. Yi Liu
  • Director of Organic and Macromolecular Synthesis Facility, Lawrence Berkeley National Laboratory
  • Thursday, February 21, 2019
  • 12:00 PM - 01:00 PM
  • Auditorium (Room 0215) between building 2 & 3
2019-02-21T12:002019-02-21T13:00Asia/RiyadhTuning Structure and Ordering for Charge Transport in Frameworks of Organic SemiconductorsMSE Graduate Seminar (MSE 398) - Spring 2019Auditorium (Room 0215) between building 2 & 3Mazen E. Mero

​ABSTRACT: Organic semiconductors with tunable optoelectronic properties are of great interest for their applications in high performance electronic devices, such as organic field-effect transistors (OFET) and organic photovoltaics (OPVs). One of the fundamental aspects related to their optoelectronic properties is the control of molecular packing, long range ordering, as well as donor-acceptor interfaces, all of which are essential for charge separation and charge transport. Our two-pronged approaches toward the development of high-performance semiconductor materials include (a) developing electroactive building blocks that satisfy bandgap engineering, high absorptivity, and strong intermolecular interactions, and (b) building network structures to facilitate charge transport. In this talk I will describe our recent advances on the development of new electroactive building blocks and their incorporation in conjugated polymers, as well as framework materials based on covalent organic frameworks (COFs) and graphitic materials. The combination of molecular level understanding of material composition and control of thin film ordering offer great opportunity for novel electronic materials.

BIOGRAPHY: Yi Liu is a Career Staff Scientist and the Organic Facility Director at the Molecular Foundry, Lawrence Berkeley National Laboratory, USA. He obtained his Ph.D. degree in Chemistry in 2004 from the University of California, Los Angeles. After his post-doctoral research at the Scripps Research Institute, he joined the Molecular Foundry in 2006 as an independent principal investigator. His research interests include design and self-assembly of functional organic and organic-inorganic hybrid framework materials, materials chemistry for organic electronics, and fundamental understanding of the associated electronic processes.


  • Mazen E. Mero