期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 16, 期 14, 页码 1384-1389出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/b517175j
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A copolymer of diarylethene and trimethylsilyl-substituted p-phenylene vinylene (TPV) was synthesized to achieve photo-induced electrical change in a solid medium. The photoisomerization of the polymer was induced by incorporating a 2,3-bis(2-methylbenzo[b]thiophen-3yl) hexafluorocyclopentene (BTF) unit, while TPV units directly connected to BTF allowed the extension of p-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 p-electron connectivity through a mainchain polymer.
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