Focus - Organic Electronics
My research program is devoted to the development of
fundamental structure-function relationships in electronic polymers. The primary
focus is to gain a deeper understanding of the effects of supramolecular
organization on electronic and optical properties and how the organization of
electroactive organic materials on the nanometer length scale can be optimized
to control desired properties. Such fundamental work is combined with a focus on
developing new materials for application in solar energy conversion.
Polymer-Based Solar Cells
based photovoltaic devices have attracted a great deal of attention based on the
potential for realizing low-cost, solution processable, and flexible solar
cells. Recently, power conversion efficiencies of ~5% have been reported for the
poly(3-hexylthiophene)/[6,6]-phenyl-C61 butyric acid methyl ester
(P3HT:PCBM) bulk heterojunction solar cell. There is
a great deal of interest in my group in developing new materials that will lead
to polymer based solar cells with improved performance and enhanced stability.
Work is focused on synthesizing new polymers and understanding how the chemical
structure of the polymer influences electronic, physical, and materials
Supramolecular Assembly of Electroactive Polymers
polymers have received a great deal of attention for potential applications in
light emitting diodes (LEDs) and photovoltaic devices (PVDs). In such cases,
electronic function is contingent on the interaction of two or more
semiconducting materials. Specifically, in PVDs, donor and acceptor materials
must work together in order to effectively harvest light, generate charge
carriers, and transport charge. One of the most effective means for assembling
two or more materials on the nanometer length scale is via the use of block
copolymers, which are known to assemble in highly organized morphologies.
However, a general platform for semiconducting block copolymers that allows
organized assembly of two or more electroactive components has not been
developed. As such, the development of new semiconducting block copolymers is a
major focus of research in my group.
Selected publications Publications at USC:
Publications at USC: