A twisted polydiacetylene quantum wire: Influence of conformation on excitons in polymeric quasi-1D systems

Antoine Al Choueiry; Thierry Barisien; Jéremy Holcman; Laurent Legrand; Michel Schott; Gerhardt Weiser; Mirela Balog; Jérome Deschamps; Sylvain Dutremez; Jean-Sébastien Filhol

arXiv · 0912.3062

A twisted polydiacetylene quantum wire: Influence of conformation on excitons in polymeric quasi-1D systems

Antoine Al Choueiry·Thierry Barisien·Jéremy Holcman·Laurent Legrand·Michel Schott·Gerhardt Weiser·Mirela Balog·Jérome Deschamps·Sylvain Dutremez·Jean-Sébastien Filhol

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Abstract

Highly luminescent isolated polydiacetylene (PDA) chains in a new diacetylene crystal are studied. The diacetylene crystal structure and theoretical calculations suggest that the chains are not planar and more strongly twisted than any known PDA. Yet the chains behave as quasi perfect quantum wires, showing that this behaviour is generic among PDA, provided crystal order is high enough. The exciton energy, E0, is higher than in any other well ordered PDA providing a relationship between E0 and twist angle. On the other hand the exciton binding energy and Bohr radius are significantly affected as demonstrated in electroabsorption experiments (and developed in a companion paper).

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Antoine Al Choueiry, Thierry Barisien, Jéremy Holcman, Laurent Legrand, Michel Schott, Gerhardt Weiser, Mirela Balog, Jérome Deschamps, Sylvain Dutremez, Jean-Sébastien Filhol. 2009-12-16. A twisted polydiacetylene quantum wire: Influence of conformation on excitons in polymeric quasi-1D systems. https://arxiv.org/abs/0912.3062

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