Photoinduced phase transformation in polythiophene

N. Hosaka, H. Tachibana, N. Shiga, M. Matsumoto, Y. Tokura

Research output: Contribution to journalArticlepeer-review

52 Citations (Scopus)


The thermally restorable photoswitching between the spectroscopically distinct two phases has been observed for thin films of poly(3-alkylthiophene) with regioregular alkyl sidegroups. The primary process of the photoinduced phase transition is completed within a duration of the exciting laser pulse (5 ns), in which photogenerated electron-hole pairs on the polymer backbone with the density above a critical value appear to trigger a self-activated process for the phase conversion. Such a fast photoswitching of the electronic and/or structural state may be applied as well to many other conjugated polymers with optoelectronic functionality.

Original languageEnglish
Pages (from-to)1672-1675
Number of pages4
JournalPhysical review letters
Issue number8
Publication statusPublished - 1999
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)


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