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Updated: Jan 31, 2026

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Interfacial Molecular-level Structures of Polymers and Biomacromolecules Revealed via Sum Frequency Generation Vibrational Spectroscopy

Published on: August 13, 2019

Engineering Interfacial Donor-Acceptor Molecular Cocrystals.

Nikolai Severin^1,2, Neda Todorova^2,3, Tomáš Neveselý^2,3

¹Department of Physics, Humboldt-Universität zu Berlin, 12489 Berlin, Germany.

The Journal of Physical Chemistry Letters

|January 29, 2026

Summary

This summary is machine-generated.

Researchers explored how Y6 molecules assemble at interfaces using scanning tunneling microscopy. Coadsorption with donor molecules formed ordered cocrystals, crucial for advancing organic solar cell performance.

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Last Updated: Jan 31, 2026

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Area of Science:

Materials Science
Organic Electronics
Surface Science

Background:

Y6 is a key non-fullerene acceptor in organic solar cells.
Its interfacial assembly behavior is poorly understood.
In-depth studies are needed to optimize device performance.

Purpose of the Study:

Investigate the self-assembly of Y6 at solid-liquid interfaces.
Understand how Y6 interacts with donor molecules.
Explore the formation of interfacial cocrystals.

Main Methods:

Utilized room-temperature scanning tunneling microscopy (STM).
Studied Y6 self-assembly on a graphite surface.
Examined coadsorption with polycyclic aromatic hydrocarbon donor molecules.

Main Results:

Demonstrated the formation of donor-acceptor interfacial cocrystals.
Showcased tailored molecular structures and order within cocrystals.
Revealed the interplay of intermolecular forces driving assembly.

Conclusions:

Gained insights into Y6 interfacial assembly.
Facilitated engineering of multicomponent interfacial nanostructures.
Aimed to improve charge separation and transport in organic optoelectronics.