Halogen-bonded Assemblies for Organic Opto-Electronic Devices

  • Facchetti, Antonio F (PD/PI)

Project: Research project

Project Details

Description

In halogen-bonding (XB), carbon-bound halogen atoms act as electron acceptors for the lone-pair electrons of heteroatoms. The potential of these Lewis acid–base interactions has seen much progress in recent years. Numerous interesting research possibilities remain, given that supramolecular chemistry is complex and the properties of the resulting assemblies are not yet fully understood. We propose to fabricate halogen-bonding supramolecular thin film assemblies, investigate the details of their electronic structure, morphology, and microstructure, determine whether/how they can be utilized according to the nature of the XB molecular components and substrate type, and finally implement them into various opto-electronic devices. The proposed experimental study, targeting new halogen-bonded thin films, is based on our initial results (van der Boom, Facchetti et al. J. Am. Chem. Soc. 2008, 130, 8162-8163; J. Am. Chem. Soc., 2010, 132, 12528-12530). The properties of this intriguing class of interactive molecules and films will be investigated by combining UV-vis and FT-IR spectroscopy, second-harmonic generation, ellipsometry, atomic force microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, and aqueous contact angle measurements. Our experimental study will be supported by M. Iron (theory; Weizmann Institute), S.-T. Ho (optical device engineering, Northwestern University), and Y. Xia (electronic device engineering, Polyera Corp.). The optical and electronic properties of the XB thin films will also be studied and when they meet the given specifications, these XB thin films will be implemented into organic thinfilm semiconductor devices such as field-effect transistors, electrooptical modulators, and solar cells. The proposed research covers diverse halogen-bonding chemistries and is expected to promote a better fundamental understanding of their molecular structure-property relationships. Moreover, it will lead to conceptually new functional materials, and will enable the fabrication of new and optimized opto-electronic devices.
StatusFinished
Effective start/end date9/1/138/31/18

Funding

  • United States-Israel Binational Science Foundation (2012250)

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