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 pmV, respectively. BT/PC composite films show excellent electro-optic properties for application in integrated optoelectronics and optics.
Original language | English |
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Article number | 024112 |
Journal | Journal of Applied Physics |
Volume | 98 |
Issue number | 2 |
DOIs | |
Publication status | Published - 15 Jul 2005 |
ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- General Physics and Astronomy