Controlling Charge-Transfer at Organic Semiconductor Interfaces

April 23, 2014
4:00-5:00pm
Location: 750 CEPSR
Speaker: Prof. Oliver Monti, Associate Professor, Department of Chemistry, University of Arizona

Abstract

Charge injection and collection at organic semiconductor interfaces are essential steps in the operation of any organic electronic device. The efficiency and dynamics of these processes depends critically and in non-trivial ways on the electronic structure at interfaces. The forces that control electronic structure and dynamics at organic semiconductor interfaces are a function of many interrelated factors in ways that are still poorly understood.

In this talk, I will discuss several specific illustrations of broader principles of the factors that determine electronic structure and charge-transfer at interfaces. I will show how the specific molecule-surface interaction mediates molecular self-assembly on the surface, tightly coupling electronic and film structure. I will further discuss how for hybrid interfaces formed between organic and inorganic semiconductors a rather different array of forces is at work; I will also explain how these forces can be harnessed to ontrol the interfacial electronic structure and charge-injection efficiencies.

Speaker Bio

Oliver MontiProf. Oliver Monti was educated at ETH Zurich (Switzerland), where he completed a combined degree in Chemistry and Physics under the supervision of Prof. Martin Quack. He moved to Oxford University (UK) to complete his D.Phil, where he was a Greendale Senior Scholar investigating photodissociation dynamics and high-n Rydberg states with Prof. Tim Softley. He obtained a Swiss National Science Foundation postdoctoral fellowship to develop novel photoionization microscopy methods at JILA with Prof. David Nesbitt. In 2004, he was hired as an Assistant Professor at the Department of Chemistry and Biochemistry at the University of Arizona; he was promoted to Associate Professor in 2011. Prof. Monti's research interests focus on electronic structure and ultrafast dynamics at organic semiconductor interfaces, ranging from charge and spin-transfer to charge-transport. He is well known for making a mean espresso to help him and others think clearly.

Hosted by Richard Osgood.


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