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http://hdl.handle.net/10397/4190
| Title: | Optical properties of ferroelectric nanocrystal-containing polymer BaTiO₃/polycarbonate films | Authors: | Liu, WC Li, AD Tan, J Mak, CL Wong, KH Wu, D Ming, N |
Issue Date: | 15-Jul-2005 | Source: | Journal of applied physics, 15 July 2005, v. 98, no. 2, 024112, p. 1-5 | Abstract: | BaTiO₃(BT)-nanocrystal-doped polycarbonate polymer composite thin films (BT/PC) with different BT concentrations were prepared by spin-coating method. Ultrafine BT (~40–50 nm) nanocrystals with pure perovskite tetragonal phase were synthesized by hydrothermal method. The structure of BT nanocrystals and composite films were studied by means of x-ray diffraction and transmission scanning microscopy. The composite films were poled with a high electric field at a suitable temperature to yield a noncentrosymmetric arrangement and produce better electro-optic properties. The poling condition under external electric field was optimized through the dielectric properties of BT and PC polymer and the effective-field intensity theory. The electro-optic (EO) coefficients and transmittance of composite films with various BT concentrations were also evaluated. The average effective linear EO coefficient and figure of merit of 20-wt % BT-doped composite films were about 63.1 and 103.1 pm/V, respectively. BT/PC composite films show excellent electro-optic properties for application in integrated optoelectronics and optics. | Keywords: | Ferroelectric materials Nanostructured materials Polymer films Composite materials Barium compounds Spin coating X-ray diffraction Transmission electron microscopy Dielectric polarisation Electro-optical effects |
Publisher: | American Institute of Physics | Journal: | Journal of applied physics | ISSN: | 0021-8979 | EISSN: | 1089-7550 | DOI: | 10.1063/1.1984076 | Rights: | © 2005 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in W. C. Liu et al., J. Appl. Phys. 98, 024112 (2005) and may be found at http://link.aip.org/link/?jap/98/024112. |
| Appears in Collections: | Journal/Magazine Article |
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