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Probing Ultrastrong Through-Space Electronic Coupling in Donor-Acceptor Systems at the Single-Molecule Level
Xin Wang1,2, Dan Yang3, Jiazheng Diao1
1Hefei National Research Center For Physical Sciences At the Microscale, University of Science and Technology of China, Hefei, China.
Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 5, 2026
Summary
Through-space donor-acceptor (TSDA) interactions offer a new way for charge transport in organic electronics. Optimized TSDA systems show high conductance, rivaling traditional molecular wires.
Area of Science:
- Organic electronics
- Semiconductor physics
- Molecular electronics
Background:
- Through-space donor-acceptor (TSDA) interactions are a novel concept in organic semiconductors.
- Molecular-level charge transport via TSDA is less understood than through-bond mechanisms.
Purpose of the Study:
- To investigate the charge transport properties of TSDA systems at the single-molecule level.
- To determine the factors influencing charge transport efficiency in face-to-face donor-acceptor configurations.
Main Methods:
- Utilized single-molecule techniques for direct probing of TSDA charge transport.
- Performed current-voltage characterization, flicker noise analysis, and mechanical stretching measurements.
- Conducted theoretical calculations and photophysical studies.
Main Results:
- Achieved conductance values up to ~0.19 G0 in optimized TSDA systems.
- Demonstrated robust electronic and mechanical coupling through various measurements.
- Confirmed through-space transmission as the dominant charge transport mechanism.
Conclusions:
- Established non-covalent TSDA coupling as an effective charge transport pathway.
- Provided molecular-level insights for designing advanced donor-acceptor systems.
- Highlighted the potential of TSDA interactions for organic electronics and optoelectronics.
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