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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 31, Number 1
BKCSDE 31(1)
January 20, 2010 

Photorefractive Performance of Poly[methyl-3-(9-carbazolyl) propylsiloxane] Based Composites Sensitized with Poly(3-hexylthiophene) in a 0.2-1wt % Range
Jin Woo Oh*, Nakjoong Kim*
Poly(3-hexylthiophene), Space charge field, Refractive index modulation, PR grating buildup speed
In this work, we report on the characterization of six low-Tg poly[methyl-3-(9-carbazolyl) propylsiloxane] based photorefractive (PR) composites sensitized with poly(3-hexylthiophene) (P3HT) in different concentrations, ranging from 0.2 to 1 wt %. At 632.8 nm, photoconductivity, space charge field, refractive index modulation, and grating buildup time were measured versus external electric field. The photoconductivity was strongly dependent on the visible light absorption and mobility. The magnitude of space charge field was affected by the conductivity contrast σph/(σph + σd). The refractive index modulation increased with the magnitude of space charge field and the PR grating buildup speed increased with the photoconductivity.
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