Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session B17: Organic Film Structure, Properties, and Dynamics
11:15 AM–2:03 PM,
Monday, March 5, 2018
LACC Room: 306A
Sponsoring Unit: DMP
Chair: Mina Yoon, Oak Ridge National Laboratory
Abstract: B17.00008 : Tailoring the growth and electronic structures of organic molecular thin films*
12:39 PM–1:15 PM
(Michigan State Univ)
(Michigan State Univ)
Understanding and control of heterointerfaces between organic and inorganic materials are critical for the development of organic electronics, molecular electronics, molecular/biological sensors, and energy harvesting devices. On the one hand, achieving large-scale molecular ordering on inorganic substrates remains a significant challenge that requires a thorough understanding of the growth mechanism. On the other hand, elucidating the charge behavior, electronic structures and energy-level alignment at the heterointerfaces are crucially important for enhancing the transport properties in hybrid devices. In this talk, I will discuss our recent discovery of the anisotropic crystalline step-flow growth of the prototypical metal phthalocyanine molecules on the deactivated Si(111)-B surface. I will then address the growth mechanism and show that the molecular ordering and molecular orientation can be effectively controlled through selective orbital coupling between the molecule and substrate. Finally, I will illustrate the effects of substrate electrostatic screening, mediated by interfacial charge transfer, on molecular electronic structures and energy-level alignment at the heterointerfaces.
*We acknowledge the financial support from the U.S. Department of Energy (DOE) Office of Science Early Career Research Program (Grant No. DE-SC0006400) through the Office of Basic Energy Sciences.
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