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Polymer Crystallization Controls Cyano-OPV Assembly for High-Performance Solid-State Fluorescence.

Xue-Wei Wei^1,2, Cong Chen¹, Tianyu Wu¹

¹Department of Materials Science and Engineering, College of New Energy and Materials, China University of Petroleum, Beijing 102249, P. R. China.

ACS Macro Letters

|January 9, 2026

Summary

This summary is machine-generated.

Researchers enhanced solid-state photoluminescence quantum yield (PLQY) in cyano-oligophenylenevinylene derivatives by using polymer crystallization. This supramolecular approach achieved a near-perfect 97% PLQY, overcoming aggregation-caused quenching for advanced optoelectronics.

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Area of Science:

Materials Science
Polymer Chemistry
Photophysics

Background:

Cyano-substituted oligo(p-phenylenevinylene) derivatives (cyano-OPVs) exhibit excellent solution photoluminescence quantum yield (PLQY).
Solid-state emission is severely hampered by aggregation-caused quenching (ACQ), reducing PLQY to 20%-40% and limiting device applications.

Purpose of the Study:

To develop a novel strategy for enhancing the solid-state PLQY of cyano-OPVs.
To overcome the limitations of ACQ in solid-state emissive materials through supramolecular interactions and polymer crystallization.

Main Methods:

Synthesized a 2-ureido-4[1H]-pyrimidinone (UPy)-functionalized cyano-OPV derivative (UPy-OPV-UPy).
Incorporated UPy-OPV-UPy into a crystallizable UPy-terminated poly(butylene succinate) (PBS-UPy) matrix.
Investigated photophysical properties and isothermal crystallization kinetics of the blends.

Main Results:

Achieved a remarkable solid-state PLQY of approximately 97% in PBS-UPy/UPy-OPV-UPy blends.
Demonstrated that crystallization-driven supramolecular reorganization disrupts unfavorable fluorophore aggregates.
Outperformed traditional solid-state fluorescent materials and even solution-state performance.

Conclusions:

Harnessing polymer crystallization via supramolecular interactions is an effective strategy to enhance solid-state PLQY.
This approach offers a new paradigm for designing high-performance solid-state emissive materials.
Successfully mitigated aggregation-caused quenching, paving the way for advanced optoelectronic devices.