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Elsevier, Current Applied Physics, 3(12), p. 903-907, 2012

DOI: 10.1016/j.cap.2011.12.005

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Large piezoresponse of lead-free Bi0.5(Na0.85K0.15)0.5TiO3 thin film

Journal article published in 2012 by Chang Won Ahn ORCID, Sung Sik Won, Aman Ullah, Sun Young Lee, Su Dae Lee, Ji Hye Lee, William Jo, Ill Won Kim
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This paper is available in a repository.

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Abstract

0.85Bi0.5Na0.5TiO3–0.15Bi0.5K0.5TiO3 (BNKT15) lead-free thin films were prepared on Pt(111)/TiO2/SiO2/Si(100) substrates by the chemical solution deposition method. BNKT15 are MPB composition in the Bi0.5Na0.5TiO3–Bi0.5K0.5TiO3 (BNT–BKT) system. The maximum piezoelectric coefficient (d33,f) value of BNKT15 thin film is approximately 75 pm/V, which is comparable to that of polycrystalline PZT thin films. These results suggest that BNKT15 thin film can be used as an alternative for PZT films in piezoelectric micro-electromechanical systems.