Highly Ordered Supramolecular Materials of Phase-Separated Block Molecules for Long-Range Exciton Transport

Martin H.C. van Son, Anton M. Berghuis, Bas F.M. de Waal, Felix A. Wenzel, Klaus Kreger, Hans-Werner Schmidt, Jaime Gómez Rivas, Ghislaine Vantomme, E. W. Meijer (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)
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Abstract

Efficient energy transport over long distances is essential for optoelectronic and light-harvesting devices. Although self-assembled nanofibers of organic molecules are shown to exhibit long exciton diffusion lengths, alignment of these nanofibers into films with large, organized domains with similar properties remains a challenge. Here, it is shown how the functionalization of C3-symmetric carbonyl-bridged triarylamine trisamide (CBT) with oligodimethylsiloxane (oDMS) side chains of discrete length leads to fully covered surfaces with aligned domains up to 125 × 70 µm2 in which long-range exciton transport takes place. The nanoscale morphology within the domains consists of highly ordered nanofibers with discrete intercolumnar spacings within a soft amorphous oDMS matrix. The oDMS prevents bundling of the CBT fibers, reducing the number of defects within the CBT columns. As a result, the columns have a high degree of coherence, leading to exciton diffusion lengths of a few hundred nanometers with exciton diffusivities (≈0.05 cm2 s−1) that are comparable to those of a crystalline tetracene. These findings represent the next step toward fully covered surfaces of highly aligned nanofibers through functionalization with oDMS.

Original languageEnglish
Article number2300891
Number of pages7
JournalAdvanced Materials
Volume35
Issue number25
DOIs
Publication statusPublished - 22 Jun 2023

Bibliographical note

Funding Information:
This work was financed by NWO (TOP‐PUNT Grant 10018944) and the Dutch Ministry of Education, Culture and Science (Gravitation Program: 024.001.035). The authors thank Prof. Richard Hildner for his contribution to the scientific discussions.

Funding

This work was financed by NWO (TOP‐PUNT Grant 10018944) and the Dutch Ministry of Education, Culture and Science (Gravitation Program: 024.001.035). The authors thank Prof. Richard Hildner for his contribution to the scientific discussions.

FundersFunder number
Ministerie van Onderwijs, Cultuur en Wetenschap024.001.035
Ministerie van Onderwijs, Cultuur en Wetenschap
Nederlandse Organisatie voor Wetenschappelijk Onderzoek10018944
Nederlandse Organisatie voor Wetenschappelijk Onderzoek

    Keywords

    • alignment
    • diffusion
    • excitons
    • long-range transport
    • nanofibers

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