Photo-induced electrical switching through a mainchain polymer

Eunkyoung Kim, Hyo Won Lee

Research output: Contribution to journalArticlepeer-review

50 Citations (Scopus)


A copolymer of diarylethene and trimethylsilyl-substituted p-phenylene vinylene (TPV) was synthesized to achieve photo-induced electrical change in a solid medium. The photo-isomerization of the polymer was induced by incorporating a 2,3-bis(2-methylbenzo[b]thiophen-3-yl)hexafluorocyclopentene (BTF) unit, while TPV units directly connected to BTF allowed the extension of π-electron delocalization. The conductivity of the polymer was significantly increased when the BTF unit was converted to a closed form (colored) using UV light. The conductivity switching was reversible by using UV and visible-light sources. The neat polymer film showed higher conductivity, while the doped polymer film with a BTF-TPV content of 10 wt% showed conductivity that was 10 times smaller than that of the neat polymer film, as estimated by the I-V plot on a photocell structured as Au/polymer/ITO. This shows the importance of π-electron connectivity through a mainchain polymer.

Original languageEnglish
Pages (from-to)1384-1389
Number of pages6
JournalJournal of Materials Chemistry
Issue number14
Publication statusPublished - 2006

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Chemistry


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