Photocurrent generation of diarylethene polymers

Eunkyoung Kim, Hyo Won Lee

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

The combination of photochromism and electrical properties in diarylethene (DA) polymers were investigated. Photoswitching function could be introduced into a polymer by incorporating 2,3-bis(2-methylbenzo[b]thiophene-3-yl) hexafluorocyclopentene (BTF) unit plus p-phenylene vinylene (PPV) unit alternatively. The photochromic film of BTF-PPV polymer become dark colored upon exposure to a UV light because π-conjugation delocalizes between the π-conjugative groups and the new absorption band centered at 570 nm was observed from the colored film. In dark the photochromic electrode coated with BTF-PPV copolymer did not show current generation. Upon exposure to UV, large incident photon-to-current generation was observed with the quinone/hydroquinone carrier couple under a bias potential of 165 mV (vs. Ag/AgCl). By optical modulation, a reversible photocurrent generation was observed from the photochromic electrode. On the otherhands, DA polymers derived from 2,3-bis(2-methyl-3-thienyl)hexafluorocyclopentene (TF) and PPV showed no photocurrent generation, indicating photodecomposition of the closed isomer.

Original languageEnglish
Pages (from-to)581-586
Number of pages6
JournalMolecular Crystals and Liquid Crystals
Volume431
DOIs
Publication statusPublished - 2005

Bibliographical note

Funding Information:
This work was financially supported by the Ministry of Science and Technology (MOST) of Korea and the grant from Yonsei University.

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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