Optical properties of ferroelectric nanocrystal-containing polymer BaTiO3polycarbonate films

W. C. Liu, A. D. Li, J. Tan, Chee Leung Mak, K. H. Wong, D. Wu, Nai Ben Ming

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

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 languageEnglish
Article number024112
JournalJournal of Applied Physics
Volume98
Issue number2
DOIs
Publication statusPublished - 15 Jul 2005

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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