Ba_xSr_{1鈭?/sub>xTiO3 thin films prepared by OTS monomolecular film reverse induction and liquid phase self-assembly method}

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• 作者：Zhao Gaoyang ; Tan Guoqiang ; Yin Jun ; Han Weiguang ; Xia Ao ; Ren Huijun
• 关键词：Liquid phase self-assembly method ; BaxSr1&minus ; xTiO3 ; Thin film ; Dielectrics
• 刊名：Journal of Alloys and Compounds
• 出版年：15 January, 2014
• 年：2014
• 卷：583
• 期：Complete
• 页码：614-619
• 全文大小：2428 K

文摘

Octadecyl-trichlorosilane self-assembled monolayers (OTS-SAMs) were prepared on the ITO glass substrate surface by self-assembled monomolecular film technique and Ba_xSr_{1鈭?/sub>xTiO3 thin film was prepared by the reverse induction and adsorption on the functionalized substrate surface. The morphologies of OTS-SAMs before and after UV-light irradiation, the variation of the contact angles, and the microstructure and electrical property of BaxSr1鈭?/sub>xTiO3 thin film were investigated. The results show that after UV-light irradiation, the hydrophilic film of OTS-SAMs with the thickness of 1 nm and the contact angle of 5掳 can be used to prepare the homogeneous BaxSr1鈭?/sub>xTiO3 thin film by the reverse induction method. As the increase of Ba content, the diffraction peaks corresponding to SrTiO3 crystal plane is shifted to small angles. The grains of the thin film are decreased as the increase of Ba doping content. When Sr/Ba is between 9/1 and 8/2, the dielectric constant of BaxSr1鈭?/sub>xTiO3 thin film is higher while the dielectric loss is smaller. At 10 kHz, the dielectric constant of Ba0.2Sr0.8TiO3 thin film is 880 and the dielectric loss is 0.04. The remnant polarization of BaxSr1鈭?/sub>xTiO3 thin film prepared by the reverse induction and adsorption and liquid phase self-assembly method is 0.64 渭C/cm² and the coercivity is 13.84 kV/cm.}