Jump to main content
Jump to site search

Issue 31, 2017
Previous Article Next Article

Controlling the morphology and crystallization of a thiophene-based all-conjugated diblock copolymer by solvent blending

Author affiliations

Abstract

We report the crystallization and microphase separation behavior of an all-conjugated poly(3-hexylthiophene)-b-poly[3-(6-hydroxy)hexylthiophene] (P3HT-b-P3HHT) block copolymer in mixed solvents and demonstrate how the conformations of P3HT and P3HHT chains influence the photophysical properties of the copolymer. It is shown that the balance among π–π stacking of P3HT, P3HHT and microphase separation of the copolymer can be dynamically shifted by controlling the rod–rod interactions of the copolymer via changing the block ratio and solvent blending. A series of nanostructures such as well-ordered nanofibers, spheres and lamellar structures are formed and their formation mechanisms and kinetics are discussed in detail. The variations in P3HT-b-P3HHT conformations are concomitant with a hybrid photophysical property depending on the competition between intrachain and interchain excitonic coupling, resulting in the transformation between J- and H-aggregation. Overall, this work demonstrates how the P3HT-b-P3HHT conformations crystallize and phase-separate in the solution and solid state, and the correlation between their structures and photophysical properties, which improves our understanding of all-conjugated rod–rod block copolymer systems.

Graphical abstract: Controlling the morphology and crystallization of a thiophene-based all-conjugated diblock copolymer by solvent blending

Back to tab navigation

Supplementary files

Publication details

The article was received on 06 Jun 2017, accepted on 27 Jun 2017 and first published on 28 Jun 2017


Article type: Paper
DOI: 10.1039/C7SM01126A
Citation: Soft Matter, 2017,13, 5261-5268
  •   Request permissions

    Controlling the morphology and crystallization of a thiophene-based all-conjugated diblock copolymer by solvent blending

    H. Cui, X. Yang, J. Peng and F. Qiu, Soft Matter, 2017, 13, 5261
    DOI: 10.1039/C7SM01126A

Search articles by author

Spotlight

Advertisements