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Alkali-Metal-Intercalated Percolation Network Regulates Self-Assembled Electronic Aromatic Molecules
Yong Hu1, Guohua Zhong2, Ying-Shi Guan1
1Department of Mechanical and Aerospace Engineering, Research and Education in Energy, Environment & Water (RENEW) Institute, University at Buffalo, The State University of New York, Buffalo, NY, 14260, USA.
Advanced Materials (Deerfield Beach, Fla.)
|January 26, 2019
Summary
Potassium intercalation in aromatic molecular crystals creates percolation networks. This enables control over conductivity and electronic properties, paving the way for advanced molecular electronic solids.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Organic Electronics
Background:
- Correlated electronic molecular crystals are a growing field with interest in alkali-metal-intercalated aromatic hydrocarbons for high-temperature superconductivity.
- Discovering superconducting aromatic molecular crystals is challenging due to small shielding fraction volumes.
- A design principle for percolation networks in thin films is crucial for exploiting this potential.
Purpose of the Study:
- To investigate the effect of potassium intercalation on percolation networks in self-assembled aromatic molecular crystals.
- To demonstrate the role of one-dimensional (1D) dipole pairs in regulating conductivity and electronic/optical transitions.
- To develop a methodology for creating stable solid-solution aromatic molecular films for technological applications.
Main Methods:
- Potassium intercalation of self-assembled aromatic molecular crystals.
- Fabrication of solid-solution aromatic molecular films.
- Analysis of electronic and optical transitions, conductivity, and charge-carrier itinerancy.
Main Results:
- Potassium intercalation establishes percolation networks in aromatic molecular crystals.
- One-dimensional (1D) dipole pairs, driven by dipole interactions, control conductivity and electronic/optical properties.
- A switchable metal-to-insulator transition is achieved through light-induced electron interactions enhancing charge-carrier itinerancy.
Conclusions:
- The study reveals a method to engineer percolation networks in alkali-metal-intercalated molecular crystals.
- This research facilitates the development of aromatic molecular electronic solids with tunable properties.
- The findings offer a pathway for long-term modulation of electronic efficacy in nanotechnological thin films.
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