Exciton dynamics of molecular aggregate systems composed of triangular lattice units: Structural dependence of exciton-migration and recurrence

Takuya Minami, Masayoshi Nakano, Hitoshi Fukui, Hiroshi Nagai, Ryohei Kishi, Hideaki Takahashi

研究成果: Article査読

4 被引用数 (Scopus)

抄録

The exciton dynamics in molecular aggregate models composed of triangular lattice units have been investigated using the quantum master equation approach including relaxation terms originating in weak exciton-phonon coupling. We observe directed migration and recurrence motion of exciton after the irradiation of a laser field. It is found that the triangular lattice aggregates tend to suppress the decoherence behavior and thus to exhibit more distinguished longer-term exciton recurrence than the similar size dendritic aggregates, although the former show less efficient exciton migration, that is, light-harvesting behavior, than the latter. These dynamical features of exciton in the triangular lattice aggregate models turned out to be characterized by the strong interactions among spatially close-packed monomers through the branching points, originating in the equilateral triangular structure, as well as by the fractal, tournament-like, architecture.

本文言語English
ページ(範囲)16675-16681
ページ数7
ジャーナルJournal of Physical Chemistry C
112
42
DOI
出版ステータスPublished - 2008 10月 23
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • エネルギー(全般)
  • 物理化学および理論化学
  • 表面、皮膜および薄膜

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