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Highly ordered n/p-co-assembled materials with remarkable charge mobilities.

Javier López-Andarias1, María José Rodriguez, Carmen Atienza

  • 1Departamento de Química Orgánica I, Facultad de Ciencias Química, Universidad Complutense , E-28040 Madrid, Spain.

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|December 23, 2014
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Summary

Researchers created ordered donor/acceptor nanofibers using ionic self-assembly. This method yields highly efficient n/p-materials for optoelectronics and photovoltaics.

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Chemical Engineering

Background:

  • Controlling self-organization and morphology of chemical architectures is crucial for enhancing energy-conversion efficiencies in optoelectronic devices.
  • Developing novel donor/acceptor materials is key for advancing photovoltaic and optoelectronic technologies.

Purpose of the Study:

  • To report a novel method for creating highly ordered donor/acceptor functional materials using ionic self-assembly.
  • To demonstrate the effectiveness of n/p-co-assembled nanofibers in optoelectronic applications.

Main Methods:

  • Ionic self-assembly was employed to separately organize electron donor (tetrathiafulvalene) and electron acceptor (perylene-bisimide) molecules into n- and p-nanofibers.
  • The n- and p-nanofibers, possessing oppositely charged ionic groups, were co-assembled to achieve periodic alignments and segregated nanodomains.

Main Results:

  • The co-assembly resulted in a material with alternately segregated donor/acceptor nanodomains.
  • Photoconductivity measurements of the n/p-co-assembled materials reached up to 0.8 cm(2) V(-1) s(-1).
  • The study confirmed the successful design of effective heterojunction structures.

Conclusions:

  • The ionic self-assembly method provides a facile route to highly ordered n/p-materials.
  • These materials hold significant potential for applications in optoelectronics and photovoltaics.
  • The achieved high photoconductivity validates the design strategy for efficient energy conversion.