Effect of PbO Seeding Layers on the Structure and Properties of the Sol–Gel-Derived BiScO3–PbTiO3 Thin Films

Authors

  • Caifu Zhong,

    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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  • Xiaohui Wang,

    Corresponding author
    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
      †Author to whom correspondence should be addressed. e-mail: wxh@tsinghua.edu.cn
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  • Yunyi Wu,

    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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  • Longtu Li

    1. State Key Laboratory of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China
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  • D. Damjanovic—contributing editor

  • This work was the supported by National Science fund for distinguished young scholars (Grant No. 50625204), Science Fund for Creative Research Groups (Grant No.50921061), and by the Ministry of Sciences and Technology of China through 973-project under Grant 2009CB623301, also by outstanding tutors for doctoral dissertations of S&T project in Beijing (No. YB20081000302).

†Author to whom correspondence should be addressed. e-mail: wxh@tsinghua.edu.cn

Abstract

Structure and dielectric/piezoelectric properties of the sol–gel-derived 0.36BiScO3–0.64PbTiO3 (BSPT) thin films deposited on Pt(111)/Ti/SiO2/Si(100) substrates with PbO seeding layers are investigated. Highly (100)-oriented BSPT thin films with thickness ranging from 250 to 950 nm were synthesized by alternatively coating PbO seeding layers and BSPT layers. The as-deposited BSPT film with thickness of 950 nm showed high dielectric constant of 1850 and effective piezoelectric coefficient d33* of approximate 150 pm/V, the latter was comparable with that of the (001) epitaxial BSPT films grown on Nb–SrTiO3 single crystal substrates. The influence of PbO seeds on the structure and electric properties of the films is discussed as well.

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